UPSC Mains 2024 Economics Optional Question Papers with Model Answers

All 56 questions of the 2024 Civil Services Main Examination, Economics Paper I and Economics Paper II, with marks and a suggested time per part. Solve each part on paper first, then open the model answer, or send it to answer-writing practice for evaluation.

UPSC Mains 2024 Economics Paper I

Question 1 (50 marks)

Q1(a) · Market Structures · 10 marks≈ 7 min
Monopolistic Competition (Chamberlin and Robinson)
Differentiate between perceived demand curve and proportional demand curve in a monopolistic competitive market. Explain why the proportional demand curve is steeper than the perceived demand curve.
हिंदी में प्रश्न
एक एकाधिकारात्मक प्रतियोगी बाज़ार में अनुभव किए गए माँग वक्र तथा आनुपातिक माँग वक्र में भेद कीजिए। समझाइए कि अनुभव किए गए माँग वक्र की तुलना में आनुपातिक माँग वक्र क्यों तीव्र ढलान वाला होता है।
Practise this question Market Structures notes
Model answer
Paper and question: Paper I, Q1(a)
Approach: Define Chamberlin's dd (perceived, ceteris paribus) and DD (proportional, share-of-market) curves and explain why DD is steeper.
In The Theory of Monopolistic Competition (1933), Edward Chamberlin gave each firm in a group of sellers of differentiated products two demand curves.
Perceived demand curve (dd): the demand the firm expects if it alone changes its price while rivals keep theirs unchanged. A price cut attracts customers from rivals as well as new buyers, so dd is relatively flat (elastic).
Proportional demand curve (DD): the demand the firm actually faces when all firms in the group change prices together. Each firm keeps a constant share (1/n) of the market demand, so DD is the firm's share of the market demand curve.
Why DD is steeper: when all firms cut price together, no firm gains customers from rivals; each gains only its share of the extra market demand. The quantity response to a given price change is therefore smaller along DD than along dd, so DD is less elastic and steeper.
Diagram: price on the vertical and quantity on the horizontal axis; a flat dd and a steeper DD crossing at the current price; a price cut along dd promises a large rise in sales, but because rivals follow, actual sales move along DD and dd slides down DD.
This gap explains why each firm keeps cutting price expecting gains, until the group reaches the tangency equilibrium.
Q1(b) · Theories of Employment, Income and Interest · 10 marks≈ 7 min
Classical Theory of Employment and Output
Discuss critically the phenomenon of classical dichotomy.
हिंदी में प्रश्न
प्रतिष्ठित विरोधाभास की घटना की आलोचनात्मक विवेचना कीजिए।
Practise this question Theories of Employment, Income and Interest notes
Model answer
Paper and question: Paper I, Q1(b)
Approach: Explain the dichotomy and its basis, then criticise it: Patinkin's real balance effect, Keynes' integration of money through the interest rate, and short-run non-neutrality.
The classical dichotomy divides the economy into two parts: the real sector, where demand and supply functions depend only on relative prices and determine output, employment and relative prices; and the monetary sector, where the quantity theory MV = PY determines the absolute price level. Money is a 'veil'.
Criticism 1, inconsistency: Patinkin (1956) showed that if real demands are homogeneous of degree zero in money prices alone, the price level is indeterminate, because Walras' law then makes the money market equation dependent on the others. Introducing the real balance effect (demand depends on M/P) restores determinacy but breaks the dichotomy, while preserving long-run neutrality.
Criticism 2, Keynes: in the General Theory (1936) money affects the interest rate through liquidity preference, and hence investment and output, so the monetary and real sectors are integrated.
Criticism 3, evidence: with sticky prices and wages, monetary policy has real effects in the short run, as RBI rate changes affect credit and output; the dichotomy holds, if at all, only in the long run.
Q1(c) · Public Finance · 10 marks≈ 7 min
Taxation: Sources of Revenue, Forms, Incidence and Effects
Show that ad valorem tax is preferable to specific sales tax from a firm's point of view in generating the same level of tax revenue.
हिंदी में प्रश्न
सिद्ध कीजिए कि एक फर्म के दृष्टिकोण से समान स्तर की कर-आय को उत्पन्न करने हेतु विशिष्ट बिक्री कर की तुलना में मूल्यानुसार कर को अधिक प्राथमिकता दी जाती है।
Practise this question Public Finance notes
Model answer
Paper and question: Paper I, Q1(c)
Approach: Compare a specific tax and an ad valorem tax that raise the same revenue from a profit-maximising (monopoly) firm; prove the result with MR-MC reasoning and a diagram.
A specific tax t per unit raises the firm's marginal cost to MC + t; an ad valorem tax at rate τ takes a share of revenue, so net marginal revenue becomes (1 − τ)MR.
Let q₁ be output under the specific tax, where MR = MC + t, and let τ raise the same revenue at q₁, so τp = t. Since MR is less than p on a downward-sloping demand curve, τMR is less than t. Hence at q₁, net marginal revenue under the ad valorem tax, MR − τMR, exceeds MR − t = MC.
So the firm expands output beyond q₁: output is larger and price lower. At q₁ profit would be the same under both taxes, so profit at the chosen output must be higher, and since revenue also rises, an even lower rate gives equal yield.
Diagram: demand D and MR falling, MC rising; the specific tax shifts MC up parallel to MC + t, the ad valorem tax pivots MR down to (1 − τ)MR; the ad valorem equilibrium lies to the right of the specific-tax equilibrium.
Hence, for equal revenue, the firm earns more profit under the ad valorem tax and consumers pay less; under perfect competition, where MR = p, the two taxes are equivalent.
Q1(d) · Money and Monetary Management · 10 marks≈ 7 min
Goals and Instruments of Monetary Policy in Closed and Open Economies
Examine the role of treasury bills in controlling money supply.
हिंदी में प्रश्न
मुद्रा की पूर्ति को नियन्त्रित करने में राजकोषीय बिल की भूमिका का परीक्षण कीजिए।
Practise this question Money and Monetary Management notes
Model answer
Paper and question: Paper I, Q1(d)
Approach: Define treasury bills, then explain how their issue and sale or purchase by the central bank (OMOs, MSS, repo collateral, SLR) absorbs or injects liquidity, with Indian examples.
Treasury bills are short-term, zero-coupon government securities issued at a discount and redeemed at face value; in India they are issued by RBI on behalf of the Centre in 91-, 182- and 364-day maturities, along with cash management bills.
Role in controlling money supply: (i) open market operations: when RBI or the government sells T-bills to banks, banks pay from their reserves, high-powered money falls and the money supply contracts; purchases do the reverse. (ii) Market Stabilisation Scheme (2004): T-bills and dated securities were issued specifically to absorb, or sterilise, the liquidity created by RBI's foreign exchange purchases; MSS was used again after demonetisation in 2016. (iii) T-bills are the main collateral in repo operations, through which RBI injects or absorbs reserves under the liquidity adjustment facility. (iv) They count towards the SLR, so banks' demand for them affects lendable resources. (v) Their yields signal short-term market rates and help transmit the policy rate.
Diagram: a T-bill sale shifts the money supply line left and raises the short-term interest rate.
Being short, liquid and nearly riskless, T-bills are the most flexible instrument for fine-tuning liquidity.
Q1(e) · Theories of Employment, Income and Interest · 10 marks≈ 7 min
Theories of Interest Rate Determination and the Term Structure
Write down the major assumptions behind Neoclassical Loanable Funds Theory of Interest.
हिंदी में प्रश्न
ब्याज के नव-प्रतिष्ठित ऋण-योग्य निधि सिद्धान्त की प्रमुख मान्यताओं का विवरण दीजिए।
Practise this question Theories of Employment, Income and Interest notes
Model answer
Paper and question: Paper I, Q1(e)
Approach: List the main assumptions of the loanable funds theory briefly, with its equilibrium condition.
The neoclassical loanable funds theory (Wicksell, Robertson, Ohlin, Viner) explains the rate of interest as the price that equates the demand for and supply of loanable funds: S + DH + ΔM + DI = I + H + DS.
Assumptions: (i) interest-elastic flows: saving and dishoarding rise with the interest rate, while investment, hoarding and dissaving fall as it rises; (ii) the level of income is given (usually full employment), so saving can be treated as a function of the interest rate alone; (iii) a perfectly competitive credit market in which the interest rate adjusts freely;
(iv) the banking system can create credit (ΔM), so money supply is a source of funds; (v) people hold idle balances, so hoarding and dishoarding are possible; (vi) a single, homogeneous rate of interest (no differences in risk or maturity); (vii) a closed economy, with analysis in terms of flows over a period (Robertson's period analysis); (viii) no money illusion in saving and investment decisions.
Diagram: interest rate against loanable funds; upward supply (S + DH + ΔM) and downward demand (I + H) crossing at the equilibrium rate.

Question 2 (50 marks)

Q2(a) · Welfare Economics · 20 marks≈ 14 min
Pareto Optimality and the Fundamental Theorems of Welfare Economics
Derive Pareto optimality conditions in production in a two commodities-two factors-two producers framework. Show that Pareto optimality does not necessarily guarantee for equity.
हिंदी में प्रश्न
उत्पादन में दो वस्तु-दो साधन-दो उत्पादकों के ढाँचे के अन्तर्गत पैरेटो इष्टतमता की शर्तों को व्युत्पन्न कीजिए। सिद्ध कीजिए कि पैरेटो इष्टतमता आवश्यक रूप से समानता का आश्वासन नहीं देती है।
Practise this question Welfare Economics notes
Model answer
Paper and question: Paper I, Q2(a)
Approach: Set up the 2×2×2 production problem, derive MRTS equality by a Lagrangian or the Edgeworth production box, derive the production possibility curve, then show with the utility frontier that efficiency can coexist with inequity.
Framework: two goods X and Y, produced by two producers (one for each good) using two factors, labour L and capital K, in fixed total supply L̄ and K̄. Production functions X = X(Lₓ, Kₓ) and Y = Y(Lᵧ, Kᵧ) have diminishing MRTS.
Derivation: production is Pareto optimal when the output of one good cannot be raised without reducing the other. Maximise X(Lₓ, Kₓ) subject to Y(L̄ − Lₓ, K̄ − Kₓ) = Ȳ. The Lagrangian Z = X(Lₓ, Kₓ) + λ[Y(L̄ − Lₓ, K̄ − Kₓ) − Ȳ] gives ∂X/∂Lₓ = λ·∂Y/∂Lᵧ and ∂X/∂Kₓ = λ·∂Y/∂Kᵧ. Dividing, MPLₓ/MPKₓ = MPLᵧ/MPKᵧ, i.e. MRTSₓ = MRTSᵧ: the isoquants of the two producers must be tangent.
Edgeworth production box: the box has sides L̄ and K̄; X's isoquants are measured from the lower-left origin and Y's from the upper-right. Points of tangency form the production contract curve; off it, as at a point where isoquants cross, a reallocation of factors can raise both outputs.
Diagram: left panel, the production box with origins Oₓ and Oᵧ, tangency points E1, E2, E3 joined into the contract curve, and a non-tangency point A; right panel, the production possibility curve obtained by plotting the outputs at E1, E2, E3, concave to the origin, with A lying inside it.
Competitive attainment: with competitive factor markets each producer sets MRTS = w/r, and since both face the same w/r, MRTSₓ = MRTSᵧ holds automatically.
Not a guarantee of equity: every point on the contract curve, and hence the PPC, is Pareto optimal. Adding exchange efficiency (MRSᴬ = MRSᴮ) and MRS = MRT, every point on the grand utility possibility frontier is efficient, including points where one person gets almost everything. Which point is reached depends on the initial ownership of factors, not on efficiency.
Equity therefore requires a value judgement, a Bergson-Samuelson social welfare function, and lump-sum redistribution (the second fundamental theorem); in practice India relies on taxes and transfers.
Q2(b) · Price Determination and Theories of Distribution · 15 marks≈ 11 min
Marshallian and Walrasian Approaches to Price Determination
Write down the behavioural assumptions used in Marshallian and Walrasian approaches of market stability. Show that these two approaches become conflicting when both the demand and supply curves are positively sloped.
हिंदी में प्रश्न
मार्शल और वालरस के बाज़ार की स्थिरता के दृष्टिकोण में प्रयुक्त व्यवहार-सम्बन्धी मान्यताओं को लिखिए। स्पष्ट कीजिए कि ये दोनों दृष्टिकोण उस समय परस्पर विरोधी हो जाते हैं जब माँग व पूर्ति दोनों वक्रों का ढाल सकारात्मक होता है।
Practise this question Price Determination and Theories of Distribution notes
Model answer
Paper and question: Paper I, Q2(b)
Approach: State the behavioural rule behind each approach, write each stability condition, then use linear upward-sloping demand and supply curves to prove that whenever one condition holds the other fails.
Walrasian assumption: buyers and sellers react to the quantity gap at a given price. When quantity demanded exceeds quantity supplied, competitive bidding raises price, and excess supply lowers it: dP/dt = k·[D(P) − S(P)], k positive. Price adjusts instantly relative to quantity.
Marshallian assumption: producers react to the price gap at a given quantity. If the demand price (what buyers will pay for Q) exceeds the supply price (what sellers need for Q), profits are abnormal and output expands: dQ/dt = k·[Pd(Q) − Ps(Q)]. Quantity is the slow, adjusting variable.
Stability conditions: Walras needs D′(P) − S′(P) negative; Marshall needs Pd′(Q) − Ps′(Q) negative.
Step 1: let inverse demand be P = a + bQ and inverse supply P = c + dQ, with b and d both positive (an upward-sloping demand curve, as for a Giffen or Veblen good).
Step 2: Marshall: Pd′ − Ps′ = b − d, negative only if b is less than d, i.e. the demand curve is flatter than the supply curve.
Step 3: Walras: D(P) = (P − a)/b and S(P) = (P − c)/d, so D′ − S′ = 1/b − 1/d, negative only if b is greater than d, i.e. the demand curve is steeper than the supply curve.
Result: since b cannot be both less and greater than d, an equilibrium that is Marshall-stable is Walras-unstable and vice versa; the two criteria give opposite verdicts whenever both curves slope upward (and agree only for normal curves of opposite slope).
Diagram: P on the vertical and Q on the horizontal axis; an upward demand curve DD steeper than an upward supply curve SS, crossing at E; at a price above P* supply exceeds demand horizontally (price falls back: Walras-stable), while at a quantity beyond Q* the demand price exceeds the supply price vertically (output expands further: Marshall-unstable).
The economic reason is that Walras measures the horizontal distance and Marshall the vertical distance between the same curves, and slopes enter as reciprocals. Which verdict is relevant depends on whether price or quantity adjusts faster in that market.
Q2(c) · Market Structures · 15 marks≈ 11 min
Monopolistic Competition (Chamberlin and Robinson)
Describe the short-run and long-run equilibrium of a firm under monopolistic competition.
हिंदी में प्रश्न
एकाधिकारात्मक प्रतियोगिता के अन्तर्गत एक फर्म के अल्पकालीन व दीर्घकालीन सन्तुलन का वर्णन कीजिए।
Practise this question Market Structures notes
Model answer
Paper and question: Paper I, Q2(c)
Approach: Describe short-run equilibrium (MR = MC with profit or loss) and long-run equilibrium with free entry (tangency of AR with LAC), using Chamberlin's diagrams, and note excess capacity.
Monopolistic competition (Chamberlin, 1933) has many sellers of differentiated products, free entry and exit, and some control over price; each firm faces a downward-sloping but elastic demand curve.
Short run: the number of firms is fixed. Each firm produces where MR = MC (MC cutting MR from below) and charges the price read from its demand curve. If price exceeds short-run average cost it earns supernormal profit; if price is below average cost but above AVC it makes a loss yet continues production.
Diagram: short run: AR and MR falling, U-shaped SAC and SMC; MR = MC at Q₁, price P₁ on AR above SAC, the profit rectangle shaded. Long run: AR tangent to LAC at E on its falling portion, with MR = LMC at the same output Qₑ, which lies to the left of the LAC minimum Qₘ.
Long run: supernormal profits attract new firms with close substitutes; each firm's demand curve shifts left (and becomes more elastic) until it is tangent to the LAC curve. At the tangency, P = LAC, so only normal profit is earned, and MR = LMC at the same output. Losses work in reverse as firms exit. In Chamberlin's group analysis, dd becomes tangent to LAC at the point where it cuts DD.
Features: since the demand curve slopes down, the tangency lies on the falling part of LAC: output is below the minimum-cost output (excess capacity) and P exceeds MC, so there is allocative inefficiency.
Long-run equilibrium thus combines monopoly power (P greater than MC) with zero economic profit, as seen in restaurants, salons and apparel brands.

Question 3 (50 marks)

Q3(a) · Theories of Employment, Income and Interest · 20 marks≈ 14 min
Keynesian Theory of Income and Employment
Explain the concept of underemployment equilibrium with graphical illustration. Why full employment cannot be reached automatically in Keynes' approach? Analyse.
हिंदी में प्रश्न
रेखाचित्र के उदाहरण से अल्प-रोजगार सन्तुलन की अवधारणा को समझाइए। कीन्स के दृष्टिकोण से पूर्ण रोजगार को स्वतः क्यों नहीं प्राप्त किया जा सकता है? विश्लेषण कीजिए।
Practise this question Theories of Employment, Income and Interest notes
Model answer
Paper and question: Paper I, Q3(a)
Approach: Define underemployment equilibrium with the Keynesian cross (or AD-AS), then analyse why automatic forces fail: wage rigidity, wage cuts reducing demand, liquidity trap, interest-inelastic investment and expectations.
Underemployment equilibrium (Keynes, General Theory, 1936) is a state in which aggregate demand equals aggregate supply, so there is no tendency for output to change, yet output is below the full-employment level and some workers are involuntarily unemployed.
Mechanism: income is determined where planned expenditure C + I + G equals output Y, i.e. where planned saving equals planned investment. With C = a + cY, equilibrium is Y = (a + I + G)/(1 − c). Nothing ensures that this Y equals full-employment output Yf; if investment is low because of pessimistic expectations, equilibrium falls short of Yf.
Diagram: expenditure on the vertical and income on the horizontal axis; a 45-degree line; aggregate expenditure C + I + G cutting it at E (income Ye) to the left of Yf; the vertical gap between the 45-degree line and expenditure at Yf is the deflationary gap; firms producing Yf would accumulate unsold stocks and cut back to Ye.
Why full employment is not automatic: (i) money-wage rigidity: workers resist money-wage cuts, so the labour market does not clear. (ii) Even with flexible wages, a wage cut lowers workers' incomes and consumption, so prices fall and the real wage need not fall; effective demand, not wages, governs employment. (iii) The interest-rate mechanism may fail: the fall in prices raises real balances and should lower interest rates (the Keynes effect), but in a liquidity trap the interest rate cannot fall further. (iv) Investment may be interest-inelastic in a slump, so even a lower rate does not raise investment. (v) Falling prices raise the real burden of debt and create expectations of further falls, depressing spending.
Assessment: the neoclassical synthesis argued that the Pigou effect would eventually restore full employment, but it is weak and slow. Keynes therefore concluded that the state must raise effective demand through fiscal policy, a conclusion India applied in the 2020 pandemic package and the rise in public capital expenditure since 2021–22.
Underemployment equilibrium is thus a consequence of deficient effective demand combined with rigidities and expectations that block self-correction.
Q3(b) · Theories of Employment, Income and Interest · 15 marks≈ 11 min
IS-LM Model and the Neo-classical Synthesis
Calculate the equilibrium national income (Y) and interest rate (r) by using an appropriate macroeconomic model from the information given below:
Aggregate saving function : s = −40 + 0·5(Y − T) + 0·25r
Tax function : T = 20 + 0·2Y
Investment function : I = 20 − 0·25r
Money demand function : L = 0·4Y − 0·5r
Aggregate money supply : M = 40 (rupees in crore)
How will the equilibrium values change when money supply is increased by ₹20 crore?
हिंदी में प्रश्न
नीचे दी हुई सूचनाओं के आधार पर सन्तुलित राष्ट्रीय आय (Y) तथा ब्याज दर (r) की गणना एक समुचित व्यापक आर्थिक मॉडल के उपयोग द्वारा कीजिए :
सकल बचत फलन : s = −40 + 0·5(Y − T) + 0·25r
कर फलन : T = 20 + 0·2Y
निवेश फलन : I = 20 − 0·25r
मुद्रा माँग फलन : L = 0·4Y − 0·5r
सकल मुद्रा पूर्ति : M = 40 (करोड़ रुपये)
जब मुद्रा की पूर्ति को ₹20 करोड़ बढ़ाया जाएगा, तब सन्तुलन मूल्यों में किस प्रकार परिवर्तन होगा?
Practise this question Theories of Employment, Income and Interest notes
Model answer
Paper and question: Paper I, Q3(b)
Approach: Use the IS-LM model: derive disposable income and saving, take goods-market equilibrium as S = I (the government spending what it collects), derive LM, solve, then repeat with M = 60 and compare.
The appropriate model is the IS-LM model, in which income and the interest rate clear the goods and money markets together. No government spending figure is given, so we take goods-market equilibrium as S = I, which is equivalent to S + T = I + G with the government spending its tax revenue (G = T).
Step 1: disposable income Y − T = Y − 20 − 0.2Y = 0.8Y − 20; saving S = −40 + 0.5(0.8Y − 20) + 0.25r = −50 + 0.4Y + 0.25r.
Step 2 (IS): S = I gives −50 + 0.4Y + 0.25r = 20 − 0.25r, so 0.4Y = 70 − 0.5r and Y = 175 − 1.25r.
Step 3 (LM): 40 = 0.4Y − 0.5r, so Y = 100 + 1.25r.
Step 4: 175 − 1.25r = 100 + 1.25r gives r = 30 and Y = 137.5 (check: 0.4 × 137.5 − 0.5 × 30 = 55 − 15 = 40).
Step 5 (M = 60): the new LM is 60 = 0.4Y − 0.5r, or Y = 150 + 1.25r. With IS, 175 − 1.25r = 150 + 1.25r gives r = 10 and Y = 162.5.
Result: the initial equilibrium is Y = ₹137.5 crore with r = 30 (per cent); after the money supply rises by ₹20 crore, income rises by 25 to ₹162.5 crore and the interest rate falls by 20 points to 10.
Interpretation: the monetary expansion creates an excess supply of money at the old interest rate; wealth holders buy bonds, bond prices rise and the interest rate falls. The lower rate raises investment (by 0.25 × 20 = 5 units) and saving rises with income until S = I again. The money multiplier here is ΔY/ΔM = 25/20 = 1.25. Its size depends on the interest sensitivity of investment and saving relative to that of money demand: because saving here also rises with the interest rate, the IS curve is fairly flat, which strengthens the effect of monetary policy on income. Graphically, LM shifts right from LM₁ to LM₂ and the equilibrium moves down along IS.
Diagram: r on the vertical and Y on the horizontal axis; a downward IS (Y = 175 − 1.25r) and LM₁ crossing at E₁ (137.5, 30); LM₂ shifted right by 50 at each r, crossing IS at E₂ (162.5, 10).
Q3(c) · Theories of Employment, Income and Interest · 15 marks≈ 11 min
Theories of Interest Rate Determination and the Term Structure
Critically analyse classical theory of interest.
हिंदी में प्रश्न
ब्याज के प्रतिष्ठित सिद्धान्त का आलोचनात्मक विश्लेषण कीजिए।
Practise this question Theories of Employment, Income and Interest notes
Model answer
Paper and question: Paper I, Q3(c)
Approach: State the classical theory (interest equates saving and investment, as a reward for waiting and the price of capital) with a diagram, then criticise it: Keynes' indeterminacy argument, saving depends on income, neglect of money and hoarding, full-employment assumption, and empirical weakness.
The classical theory of interest (Marshall, Pigou, Fisher) treats interest as a real price set by thrift and productivity: saving, the reward for 'waiting', rises with the rate; investment, governed by the marginal productivity of capital, falls with it; the equilibrium rate equates the two at full employment.
Diagram: interest rate on the vertical and saving and investment on the horizontal axis; rising S and falling I crossing at r₀; an increase in thrift shifts S to S′, lowering the rate to r₁ and raising investment.
Criticisms: (i) Indeterminacy (Keynes, 1936): the saving schedule depends on income, and income depends on investment and so on the interest rate; a family of saving curves exists, one for each income level, so the rate cannot be determined unless income is already known. (ii) Saving is mainly a function of income, not of the interest rate; the interest elasticity of saving is small and may even be negative (target savers). (iii) It is a purely real theory that ignores money, hoarding, bank credit and the demand for money as an asset; yet in practice central banks influence the interest rate.
(iv) It assumes full employment; with unemployment, a rise in thrift lowers income (the paradox of thrift) rather than raising investment. (v) Investment depends heavily on expectations of profit (the marginal efficiency of capital), which are volatile, not just on the interest rate. (vi) It treats the interest rate as a single rate, ignoring term structure and risk.

Question 4 (50 marks)

Q4(a) · Money and Monetary Management · 20 marks≈ 14 min
Supply of Money and the Money Multiplier
Describe the mechanism of credit creation by commercial banks and its implications on multiplier effect. Analyse some of the limitations that can jeopardise the implications on multiplier effect.
हिंदी में प्रश्न
व्यापारिक बैंकों द्वारा साख सृजन के तन्त्र तथा गुणक प्रभाव पर इसके निहितार्थों का वर्णन कीजिए। कुछ सीमाओं का भी विश्लेषण कीजिए जो गुणक प्रभाव के निहितार्थों को हानि पहुँचा सकती हैं।
Practise this question Money and Monetary Management notes
Model answer
Paper and question: Paper I, Q4(a)
Approach: Explain fractional-reserve credit creation step by step with a numerical example (deposit multiplier 1/r), relate it to the money multiplier (1 + c)/(c + r), then analyse the leakages and limitations that reduce the multiplier.
Credit creation is the process by which commercial banks, keeping only a fraction of deposits as reserves, lend the rest and thereby create new deposits; loans create deposits.
Mechanism: suppose the reserve ratio is r = 10 per cent and a customer deposits ₹1,000 of new cash in Bank A. Bank A keeps ₹100 and lends ₹900; the borrower pays a supplier who deposits ₹900 in Bank B, which keeps ₹90 and lends ₹810, and so on. Total deposits = 1,000 + 900 + 810 + … = 1,000/(1 − 0.9) = 1,000/0.1 = ₹10,000; total new credit = ₹9,000.
Multiplier effect: the simple deposit multiplier is ΔD = ΔR/r, i.e. 1/r = 10. When the public also holds currency in proportion c to deposits, part of each loan leaks into cash, and the money multiplier becomes m = (1 + c)/(c + r). With c = 0.2 and r = 0.1, m = 1.2/0.3 = 4, much smaller than 10.
Limitations: (i) currency drain: a higher c (as with cash-intensive economies) reduces the multiplier; (ii) excess reserves: in uncertain times banks hold more than the required reserves; (iii) lack of demand for credit or of creditworthy borrowers and collateral, as in a recession, so banks cannot lend; (iv) bad loans: high NPAs erode capital and make banks risk-averse, as in India in 2016–19; (v) capital adequacy norms (Basel III) cap lending relative to capital; (vi) statutory liquidity ratio (SLR) requirements divert funds into government securities; (vii) central bank policy, such as a higher CRR.
Diagram: a flow chart of successive deposit rounds (1,000, 900, 810 …) converging to 10,000, beside a bar showing m falling from 10 to 4 as currency drain is added.
Q4(b) · Welfare Economics · 15 marks≈ 11 min
Market Failure: Externalities, Public Goods and Asymmetric Information
Distinguish between public goods and private goods. Explain how market failure occurs in the case of public goods.
हिंदी में प्रश्न
सार्वजनिक व निजी वस्तुओं में भेद कीजिए। सार्वजनिक वस्तुओं के सन्दर्भ में कैसे बाज़ार की असफलता उत्पन्न होती है, व्याख्या कीजिए।
Practise this question Welfare Economics notes
Model answer
Paper and question: Paper I, Q4(b)
Approach: Distinguish public and private goods by rivalry and excludability, then show why the market fails for public goods: vertical summation and the Samuelson condition versus private provision with free riding, with a diagram.
Private goods are rival and excludable: a mango eaten by one cannot be eaten by another, and non-payers can be refused. Public goods (Samuelson, 1954) are non-rival (an extra user costs nothing) and non-excludable (non-payers cannot be shut out): defence, lighthouses, clean air.
Efficient provision: for private goods, market demand is the horizontal sum of individual demands, and efficiency requires each consumer's MRS to equal MRT. For a public good, each unit is consumed jointly, so its social value is the sum of all consumers' marginal valuations: efficiency requires ΣMRS = MRT (the Samuelson condition), i.e. the vertically summed demand curve must cut the marginal cost curve.
Why the market fails: (i) non-excludability creates the free-rider problem: each consumer understates his valuation, expecting others to pay; (ii) private suppliers cannot collect revenue from non-payers, so they supply little or nothing; (iii) even if exclusion were possible, charging a positive price for a non-rival good excludes users whose consumption costs nothing, a deadweight loss; (iv) the Lindahl solution (personalised tax prices equal to each person's marginal valuation) is efficient in theory but fails because people have no incentive to reveal true preferences.
Diagram: quantity of the public good on the horizontal axis and price on the vertical; individual demand curves DA and DB; their vertical sum ΣD; a horizontal MC line; the efficient output Q* where ΣD cuts MC; private provision Qₚ, smaller than Q*, where only one consumer's demand meets MC.
Public goods are therefore provided by the state through taxation, as in India's defence, policing and disease-surveillance programmes.
Q4(c) · Money and Monetary Management · 15 marks≈ 11 min
Quantity Theories of Money: Fisher, Cambridge (Pigou) and Friedman
What is the difference between Fisher's theory and Cambridge cash balance approach to quantity theory of money? What is the criticism of each? Which one is more relevant in present context? Justify.
हिंदी में प्रश्न
मुद्रा के परिमाण सिद्धान्त के अन्तर्गत फिशर के सिद्धान्त तथा केम्ब्रिज के नकद शेष दृष्टिकोण में क्या अन्तर है? प्रत्येक दृष्टिकोण की क्या आलोचना की गई है? वर्तमान सन्दर्भ में कौन-सा दृष्टिकोण अधिक प्रासंगिक है? औचित्य सिद्ध कीजिए।
Practise this question Money and Monetary Management notes
Model answer
Paper and question: Paper I, Q4(c)
Approach: Contrast Fisher's transactions approach and the Cambridge cash-balance approach, give the criticisms of each, and argue which is more relevant today (Cambridge, as the basis of modern money-demand theory, with caveats).
Fisher (1911): MV = PT; with V and T constant in the short run (full employment, slowly changing institutions), the price level varies proportionately with M. Cambridge (Marshall, Pigou 1917, Keynes' early work): M = kPY, where k is the proportion of income people choose to hold as money.
Differences: (i) Fisher stresses the supply and flow of money (medium of exchange), Cambridge the demand for money as a stock (store of value); (ii) V is institutional, k behavioural; (iii) T includes all transactions, Y only final output; (iv) Cambridge allows k to vary with interest rates, wealth and expectations, and so explains short-run changes in the value of money.
Criticisms of Fisher: it is a truism (an identity) unless V and T are assumed constant; assuming full employment it ignores output changes; it neglects the interest rate and the store-of-value function; and T is hard to measure. Criticisms of Cambridge: it too assumes Y fixed and k stable; it does not specify the determinants of k precisely; and it ignores the speculative demand for money that Keynes later stressed.
More relevant today: the Cambridge approach, since modern theory (Keynes, Friedman) treats money demand as behavioural and central banks analyse income velocity. Yet digital payments such as UPI have made velocity unstable, which is why RBI moved to flexible inflation targeting in 2016.
Diagram: (Y, P) space with AD from M = kPY drawn as a rectangular hyperbola; a rise in k (more money held) shifts AD inward, lowering P at fixed Y.

Question 5 (50 marks)

Q5(a) · Economic Development · 10 marks≈ 7 min
Measuring Development: Human Development Indices and the Basic Needs Approach
Critically examine 'per capita' GDP as a crude indicator of development.
हिंदी में प्रश्न
विकास के सन्दर्भ में 'प्रति व्यक्ति' जी॰ डी॰ पी॰ एक अपरिष्कृत सूचक है। आलोचनात्मक व्याख्या कीजिए।
Practise this question Economic Development notes
Model answer
Paper and question: Paper I, Q5(a)
Approach: Explain what per capita GDP measures and why it is useful, then critically examine its shortcomings as a development indicator, and mention better measures.
Per capita GDP, the value of output divided by population, is the most widely used indicator of development because it is easy to measure, comparable and closely related to living standards. Yet it is a crude indicator.
Shortcomings: (i) it is an average that ignores distribution: a rise may accrue to a few; (ii) it excludes non-market activities such as household work and subsistence production, important in developing countries; (iii) it ignores environmental depletion and pollution, counting resource extraction as income; (iv) it counts 'regrettables' such as defence and pollution clean-up as output; (v) it omits leisure, health, education, freedom and security; (vi) exchange-rate conversion distorts comparisons unless PPP is used; (vii) GDP includes income paid to foreigners, so GNI may be a better income measure.
Sen showed that countries with similar income differ greatly in life expectancy and literacy (Kerala versus richer states).
Hence better measures such as the HDI, IHDI, multidimensional poverty index and green accounting supplement per capita GDP.
Q5(b) · Balance of Payments and Exchange Rates · 10 marks≈ 7 min
Exchange Rate Regimes: Fixed, Floating, Currency Boards and Developing Countries
Explain managed floating and sterilized interventions for exchange rate.
हिंदी में प्रश्न
विनिमय दर के प्रबन्धित चल तथा निष्फल हस्तक्षेपों को समझाइए।
Practise this question Balance of Payments and Exchange Rates notes
Model answer
Paper and question: Paper I, Q5(b)
Approach: Define managed floating and sterilised intervention, show how sterilisation keeps the monetary base unchanged, and give India's practice and the limits.
Managed floating is a regime in which the exchange rate is determined mainly by market demand and supply, but the central bank intervenes, without a pre-announced target, to smooth excessive volatility and prevent disorderly movements.
India has followed it since March 1993, when the rupee moved to a market-determined rate.
Sterilised intervention is foreign-exchange intervention whose effect on the domestic money supply is offset. When the RBI buys dollars to prevent appreciation, it injects rupees and its reserves rise; it then sells government securities (open market operations) or uses instruments such as the Market Stabilisation Scheme (2004) to absorb the extra rupees, so the monetary base (H = domestic credit + reserves) is unchanged. When it sells dollars, it buys securities to restore liquidity.
Sterilised intervention can influence the exchange rate through portfolio and signalling effects while preserving monetary control for inflation targeting. But it is costly (interest paid on securities exceeds the return on reserves), keeps domestic interest rates high and attracts further inflows, and becomes less effective as capital mobility rises.
Q5(c) · Economic Development · 10 marks≈ 7 min
Development and Environmental Sustainability
Discuss how carbon trading is helpful in reducing environmental degradation.
हिंदी में प्रश्न
कार्बन व्यापार किस प्रकार पर्यावरण अवनयन को कम करने में सहायक होता है? विवेचना कीजिए।
Practise this question Economic Development notes
Model answer
Paper and question: Paper I, Q5(c)
Approach: Explain cap and trade, why trading achieves a given emission cut at least cost (equalising marginal abatement costs), and give examples with limitations.
Carbon trading (cap and trade), proposed by J.H. Dales (1968), sets a ceiling (cap) on total emissions and issues permits equal to the cap; firms must hold a permit for each tonne emitted and may buy or sell permits.
It reduces degradation in two ways. First, the cap fixes the environmental outcome. Second, trading achieves it at least cost: firms with low marginal abatement costs cut more and sell permits, firms with high costs buy them, until marginal abatement costs are equal across firms (Montgomery, 1972). The permit price also gives a continuing incentive to adopt cleaner technology.
Diagram: two firms' marginal abatement cost curves; trading moves abatement until both MACs equal the permit price.
Examples include the EU Emissions Trading System (2005), the US sulphur dioxide programme (1990s), and India's Perform, Achieve and Trade scheme (2012) and Carbon Credit Trading Scheme (2023). Limitations: over-allocation of permits, price volatility, monitoring costs and the risk that firms relocate (carbon leakage).
Q5(d) · Trade Policy, Protection and the WTO · 10 marks≈ 7 min
Tariffs and Quotas: Effects and Comparison
"Higher tariffs do not increase employment, they just redistribute the unemployed." Do you agree with the statement? Explain.
हिंदी में प्रश्न
"उच्च प्रशुल्क रोजगार में वृद्धि न करके मात्र बेरोजगारों का पुनर्वितरण करते हैं।" क्या आप इस कथन से सहमत हैं? समझाइए।
Practise this question Trade Policy, Protection and the WTO notes
Model answer
Paper and question: Paper I, Q5(d)
Approach: Largely agree: explain how a tariff saves jobs in import-competing industries but destroys them elsewhere (exports, user industries, retaliation, exchange rate), give evidence, and note the Keynesian exception.
Largely yes. A tariff raises employment in the protected import-competing industry, but it reduces employment elsewhere, so the aggregate effect is close to zero and the unemployed are redistributed.
Channels of job loss: (i) user industries pay more for protected inputs and become less competitive; (ii) lower imports reduce foreign incomes and demand for the country's exports, and partners often retaliate; (iii) lower demand for foreign currency causes the domestic currency to appreciate, hurting exporters; (iv) consumers spend more on protected goods and less on others. Total employment in the long run depends on aggregate demand, labour-market institutions and productivity, not on the trade balance.
Evidence: studies of the 2018 US steel and aluminium tariffs (Flaaen and Pierce, 2019) found that job gains in steel were outweighed by losses in steel-using manufacturing; the Smoot-Hawley tariff of 1930 provoked retaliation that deepened the Depression.
In a deep recession with fixed exchange rates, a tariff may raise domestic demand in the short run, but only by exporting unemployment (a 'beggar-thy-neighbour' policy).
Q5(e) · Theories of International Trade · 10 marks≈ 7 min
Terms of Trade and Offer Curves
Explain how the equilibrium terms of trade are determined by using offer curves of the trading partners.
हिंदी में प्रश्न
समझाइए कि किस प्रकार व्यापार के भागीदारों के लिए अर्पण वक्रों की सहायता से संतुलित व्यापार की शर्तें तय होती हैं।
Practise this question Theories of International Trade notes
Model answer
Paper and question: Paper I, Q5(e)
Approach: Draw both offer curves, show that their intersection gives the equilibrium terms of trade and trade volumes, explain stability and the effect of a shift (e.g. a tariff or increased demand).
The offer curve of each country (Marshall, Edgeworth) shows how much of its export good it will give for various amounts of its import good at each terms of trade. Home exports X and imports Y; Foreign exports Y and imports X.
Diagram: X on the horizontal axis and Y on the vertical; Home's offer curve OH rises from the origin bending towards the Y axis; Foreign's offer curve OF rises bending towards the X axis; they intersect at E; the ray OE gives the equilibrium terms of trade, and the coordinates of E give Home's exports of X and imports of Y (equal to Foreign's imports and exports).
At any other terms of trade, Home's offer of X does not match Foreign's demand for X, so there is excess demand or supply and the terms of trade adjust until the two offers match at E, where trade is balanced. The equilibrium is stable when the sum of the import demand elasticities exceeds one (the Marshall-Lerner condition in real terms).
If Home's demand for Y rises or it imposes a tariff, its offer curve shifts; a tariff shifts OH towards its import axis (less X offered for each quantity of Y) and, for a large country, improves its terms of trade, while the volume of trade falls. The more elastic the partner's offer curve, the less the terms of trade change.

Question 6 (50 marks)

Q6(a) · Balance of Payments and Exchange Rates · 20 marks≈ 14 min
Balance of Payments Adjustment: Elasticity, Absorption and Monetary Approaches
Discuss the elasticity approach and absorption approach for adjustments in balance of payments.
हिंदी में प्रश्न
भुगतान शेष में समायोजन के लोच दृष्टिकोण तथा अवशोषण दृष्टिकोण का वर्णन कीजिए।
Practise this question Balance of Payments and Exchange Rates notes
Model answer
Paper and question: Paper I, Q6(a)
Approach: Explain the elasticity approach (Marshall-Lerner condition, J-curve) and the absorption approach (Alexander's B = Y − A, income and absorption effects), compare them and show they are complementary.
Both approaches analyse how a devaluation (or depreciation) can correct a current account deficit, but they emphasise different mechanisms.
Elasticity approach (Marshall, Lerner, Joan Robinson): devaluation changes relative prices, making exports cheaper abroad and imports dearer at home. Whether the trade balance improves depends on demand elasticities. The Marshall-Lerner condition states that, starting from balanced trade and with infinitely elastic supplies, devaluation improves the trade balance if the sum of the absolute price elasticities of demand for exports and imports exceeds one (|ex| + |em| greater than 1). In the short run elasticities are low, giving the J-curve.
Absorption approach (Sidney Alexander, 1952): from national income accounting, B = Y − A, where A = C + I + G is domestic absorption. A deficit means the country spends more than it produces, so devaluation can improve B only if it raises output Y relative to absorption or reduces absorption. ΔB = (1 − a)ΔY − ΔAd, where a is the propensity to absorb and ΔAd the direct effect on absorption. With unemployment, devaluation raises Y through net exports (income effect); at full employment it must reduce absorption through the real balance effect, money illusion, redistribution towards high savers or higher taxes, otherwise it only causes inflation.
Comparison: the elasticity approach focuses on relative prices (expenditure switching), the absorption approach on aggregate spending and output (expenditure reduction); the first is micro and partial, the second macro and general. Alexander first presented them as rivals, but Machlup and later writers showed they are complementary: devaluation needs favourable elasticities to switch spending, and absorption must fall relative to income to make room for better net exports.
Hence, as in India's 1991 adjustment, devaluation was combined with fiscal consolidation to reduce absorption.
Q6(b) · Theories of International Trade · 15 marks≈ 11 min
Comparative Advantage: Ricardo and Heckscher-Ohlin
By using Stolper-Samuelson theorem, discuss the possible effects of free trade on income inequalities in developing countries.
हिंदी में प्रश्न
स्टोलपर-सैम्युएलसन सिद्धान्त की सहायता से विकासशील देशों की आय की असमानताओं पर पड़ने वाले मुक्त व्यापार के सम्भावित प्रभावों की चर्चा कीजिए।
Practise this question Theories of International Trade notes
Model answer
Paper and question: Paper I, Q6(b)
Approach: State the Stolper-Samuelson theorem and its prediction for labour-abundant developing countries, then examine the evidence and the reasons why liberalisation has often raised inequality, and conclude.
Stolper-Samuelson theorem (1941): in the 2×2 H-O model, a rise in the relative price of a good raises the real return of the factor used intensively in producing it and lowers the real return of the other factor, with a magnification effect (the factor price changes more than proportionately).
Prediction for developing countries: these countries are abundant in unskilled labour. Free trade raises the relative price of their labour-intensive exports (textiles, garments, assembly), so real wages of unskilled workers rise and returns to capital and skill fall. Inequality between labour and capital, and between unskilled and skilled workers, should therefore fall.
Evidence: after liberalisation in Mexico, Colombia, Brazil and India, wage inequality often rose (Goldberg and Pavcnik, 2007). Reasons: (i) before reform the most protected sectors were often unskilled-labour-intensive, so tariff cuts lowered their relative prices; (ii) outsourcing within global value chains moves tasks that are skill-intensive for the developing country (Feenstra and Hanson); (iii) trade brings skill-biased technology; (iv) many factors and imperfect mobility between sectors and regions; (v) large informal sectors and entry of China and other low-wage exporters, which kept prices of labour-intensive goods low.
Hence Stolper-Samuelson implies that free trade should reduce inequality in labour-abundant countries, but in practice the effect depends on the pattern of protection, technology and labour mobility; complementary policies such as education, skills and social protection are needed.
Q6(c) · Balance of Payments and Exchange Rates · 15 marks≈ 11 min
Balance of Payments Adjustment: Elasticity, Absorption and Monetary Approaches
Explain how the elasticity of demand for foreign exchange is influenced by the elasticity of home demand for imports and by the elasticity of home supply of import-competing goods.
हिंदी में प्रश्न
समझाइए कि किस प्रकार विदेशी विनिमय की माँग की लोच, आयातों की घरेलू माँग की लोच तथा आयात प्रतियोगी उत्पादों की घरेलू पूर्ति की लोच से प्रभावित होती है।
Practise this question Balance of Payments and Exchange Rates notes
Model answer
Paper and question: Paper I, Q6(c)
Approach: Derive the elasticity of import demand from home demand and supply (eM = eD·D/M + eS·S/M), link it to the elasticity of demand for foreign exchange, and explain with a diagram and example.
A country's demand for foreign exchange arises from its imports: the quantity of foreign currency demanded equals the foreign-currency price of imports times the volume of imports. With foreign-currency prices given, a rise in the exchange rate (depreciation) raises the domestic price of imports and reduces the volume imported in proportion to the elasticity of import demand; so the elasticity of demand for foreign exchange equals the elasticity of import demand.
Import demand is excess demand: imports M = D − S, where D is home demand and S is home supply of the import-competing good. When the domestic price rises by a small percentage, D falls and S rises, so imports fall by both amounts. Hence eM = eD × (D/M) + eS × (S/M), where eD is the (absolute) elasticity of home demand and eS the elasticity of home supply of import-competing goods.
Implications: (i) the more elastic home demand, the more imports fall; (ii) the more elastic home supply of import substitutes, the more domestic producers replace imports; (iii) because D/M and S/M exceed one when imports are a small share of consumption, import demand is more elastic than either home demand or supply.
Diagram: home demand and supply of the importable; import demand derived as the horizontal gap between them, flatter than either curve; the resulting demand curve for foreign exchange slopes down with that elasticity.
So a country with good domestic substitutes and price-sensitive consumers has an elastic demand for foreign exchange, which makes depreciation effective; a country dependent on essential imports such as crude oil (India) has an inelastic demand.

Question 7 (50 marks)

Q7(a) · Theories of Growth · 20 marks≈ 14 min
Lewis Model of Development with Surplus Labour (and Ranis-Fei)
Explain how the structural transformation, in the economy, takes place with surplus labour as per Lewis theory of economic development.
हिंदी में प्रश्न
समझाइए कि लेविस के आर्थिक विकास के सिद्धान्त के अनुसार आधिक्य श्रम द्वारा अर्थव्यवस्था में किस प्रकार संरचनात्मक रूपान्तरण होता है।
Practise this question Theories of Growth notes
Model answer
Paper and question: Paper I, Q7(a)
Approach: Present Lewis's dual economy (assumptions, unlimited labour at the institutional wage, reinvestment of profits), the process of labour transfer to the turning point with the diagram, then critiques.
W. Arthur Lewis, in 'Economic Development with Unlimited Supplies of Labour' (1954), explained structural transformation as the transfer of labour from a traditional subsistence sector to a modern capitalist sector.
Assumptions: a dual economy; the subsistence sector (mainly agriculture) has surplus labour whose marginal product is zero or negligible, so labour can be withdrawn without reducing output; the subsistence wage is set by average product (an institutional wage); the capitalist sector pays a wage about 30% higher, enough to attract migrants, so it faces a perfectly elastic labour supply; capitalists save and reinvest all profits, workers do not save.
Process: the capitalist sector employs labour up to where its marginal product equals the wage. Profits are reinvested, the marginal product curve shifts out, and more labour is drawn in at the same wage. Profits and saving rise as a share of national income, from about 5% to 12% or more, which Lewis called the central problem of development. Employment, output and the industrial share rise while agriculture's share of labour falls.
Diagram: labour on the horizontal axis and wage on the vertical; a horizontal labour supply at the capitalist wage W; successive marginal product curves MP1, MP2, MP3 shift outwards with reinvestment; employment rises from L1 to L2 to L3; the area under each curve above W is profit; after the surplus is exhausted the supply curve turns upward (the turning point).
Turning point: once surplus labour is absorbed, wages rise in both sectors, agriculture is commercialised and the dual economy becomes an integrated one; this is the Lewis turning point, observed in Japan, and debated for China around 2010.
Critique: capital accumulation may be labour-saving (so employment need not rise), urban unemployment coexists with rising wages (Todaro), surplus labour may not exist (Schultz), and agriculture must grow to avoid food shortages (Ranis-Fei). Still, the model remains the basic account of structural change.
Q7(b) · Economic Development · 15 marks≈ 11 min
Planning, Tinbergen, Market versus Planning and Public-Private Partnership
What are the advantages and disadvantages of public-private partnership model for economic development? What are the key prerequisites for success of PPP model? Explain giving examples.
हिंदी में प्रश्न
आर्थिक विकास में सार्वजनिक-निजी भागीदारी मॉडल के लाभ व हानियाँ क्या हैं? सार्वजनिक-निजी भागीदारी मॉडल की सफलता की मुख्य पूर्व आवश्यकताएँ क्या हैं? उदाहरण के साथ व्याख्या कीजिए।
Practise this question Economic Development notes
Model answer
Paper and question: Paper I, Q7(b)
Approach: Define PPP and its models, list advantages and disadvantages with Indian examples, then set out the prerequisites for success (risk allocation, regulation, renegotiation framework, finance), citing the Kelkar Committee.
A public-private partnership is a long-term contract in which a private party finances, builds and operates a public asset or service, bears significant risk and is paid through user charges or government annuities. Models include BOT (build-operate-transfer), DBFOT, the Hybrid Annuity Model (HAM, used by NHAI since 2016) and TOT (toll-operate-transfer).
Advantages: additional finance beyond the budget; private efficiency, technology and management; faster completion and better maintenance through whole-life costing; transfer of construction and operating risk; and service quality, as in the Delhi, Mumbai, Hyderabad and Bengaluru airports developed under PPP from the mid-2000s.
Disadvantages: higher private cost of capital; complex contracts and high transaction costs; aggressive bidding followed by renegotiation and stalled projects (many highway BOT projects after 2011); contingent liabilities for government; user charges that may exclude the poor.
Prerequisites for success (many recommended by the Kelkar Committee on revisiting and revitalising PPP, 2015): (i) balanced risk allocation, each risk borne by the party best able to manage it; (ii) well-prepared projects with land and clearances in place; (iii) transparent competitive bidding; (iv) independent sectoral regulators; (v) a framework for renegotiation and quick dispute resolution; (vi) long-term finance, such as viability gap funding (from 2006) and infrastructure debt funds; (vii) capacity in public agencies.
PPP works best where outputs are measurable and revenues reliable, and is no substitute for good public procurement elsewhere.
Q7(c) · Trade Policy, Protection and the WTO · 15 marks≈ 11 min
Trade Policy and Developing Countries
Discuss the issues (pros and cons) in the debate over import substitution and export promotion strategy for developing countries. Which strategy would you favour and why? Explain.
हिंदी में प्रश्न
विकासशील देशों के लिए आयात प्रतिस्थापन तथा निर्यात संवर्धन की रणनीति के वाद-विवाद के मुद्दों (पक्ष-विपक्ष) की विवेचना कीजिए। आप किस रणनीति का समर्थन करेंगे और क्यों? समझाइए।
Practise this question Trade Policy, Protection and the WTO notes
Model answer
Paper and question: Paper I, Q7(c)
Approach: Set out the case for and against import substitution (ISI) and export promotion (EP), with Latin American, East Asian and Indian experience, then take a reasoned position.
Import substitution industrialisation (ISI) protects domestic industry with tariffs, quotas and licences so that goods previously imported are produced at home. Export promotion (EP) integrates the economy with world markets and encourages industries that can compete abroad.
ISI, pros: infant-industry protection (List, Hamilton), building an industrial base, saving foreign exchange, and the Prebisch-Singer and Nurkse export pessimism. Cons: high-cost, inefficient industries, small markets that prevent scale economies, anti-export bias through overvalued currencies, rent-seeking under licensing (Krueger, 1974), capital-intensive production with few jobs, and recurring foreign-exchange crises, as in Latin America and India before 1991.
EP, pros: specialisation by comparative advantage, scale economies, competitive discipline, technology through FDI and learning, labour-intensive employment and foreign-exchange earnings; the East Asian economies grew rapidly this way. Cons: exposure to world demand shocks and protectionism, the 'fallacy of composition' if all developing countries export the same goods, and the risk of a race to the bottom on wages.
Position: I favour export promotion combined with selective, time-bound support for new industries. East Asia itself used protection and industrial policy, but made support conditional on export performance; India's own growth accelerated after the 1991 reforms opened the economy. Today global value chains make it costly to protect inputs, so the PLI schemes (2020), which reward incremental production including exports, and investment in infrastructure and skills are the better route than broad import substitution.

Question 8 (50 marks)

Q8(a) · Economic Development · 20 marks≈ 14 min
Measuring Development: Human Development Indices and the Basic Needs Approach
Describe the major components used in Human Development Index (HDI) by the United Nations Development Programme (UNDP). Write down the methodological limitations of this index. Suggest appropriate method to eliminate these limitations.
हिंदी में प्रश्न
संयुक्त राष्ट्र विकास कार्यक्रम (यू॰ एन॰ डी॰ पी॰) के मानव विकास सूचकांक (एच॰ डी॰ आइ॰) के मुख्य अवयवों का वर्णन कीजिए। इस सूचकांक की प्राविधिक (क्रिया-पद्धति की) सीमाओं को लिखिए। इन सीमाओं को दूर करने के लिए उपयुक्त प्रविधि का सुझाव दीजिए।
Practise this question Economic Development notes
Model answer
Paper and question: Paper I, Q8(a)
Approach: Describe the three dimensions, indicators, goalposts and aggregation of the HDI with the formula; list its methodological limitations; then suggest remedies (inequality adjustment, quality indicators, alternative weighting, additional dimensions, sustainability adjustment).
The Human Development Index, introduced by UNDP in 1990 under Mahbub ul Haq and inspired by Sen's capability approach, measures average achievement in three dimensions.
Components: (i) a long and healthy life: life expectancy at birth (goalposts 20 and 85 years); (ii) knowledge: mean years of schooling of adults aged 25 and above (maximum 15) and expected years of schooling for children (maximum 18), averaged; (iii) a decent standard of living: GNI per capita in PPP dollars (goalposts 100 and 75,000), in logarithms. Each dimension index = (actual − minimum)/(maximum − minimum), and since 2010 HDI = (I_health × I_education × I_income)^(1/3), a geometric mean. In the 2025 Report India's HDI was 0.685, ranked 130th of 193 countries.
Methodological limitations: (i) the goalposts and equal weights are arbitrary; (ii) the geometric mean still allows substitution between dimensions, implying controversial trade-offs between income and longevity (Ravallion, 2012); (iii) averages ignore inequality within countries; (iv) indicators measure quantity, not quality (schooling, not learning); (v) the log of income treats income gains at high levels as almost worthless; (vi) missing dimensions: gender, freedom, security, environment.
Remedies: (i) adjust for inequality, as in the IHDI (2010), which discounts each dimension by its Atkinson inequality; (ii) use quality indicators such as learning-adjusted years of schooling and healthy life expectancy; (iii) derive weights statistically (principal component analysis) or through public consultation, and test rankings for sensitivity; (iv) supplement with the GDI, GII and Multidimensional Poverty Index; (v) adjust for sustainability, as in the planetary pressures-adjusted HDI (2020) or by using adjusted net savings; (vi) improve national data and disaggregate to sub-national levels.
With these remedies the HDI becomes a more reliable dashboard of human development, though no single index can capture all of it.
Q8(b) · Economic Development · 15 marks≈ 11 min
Myrdal, Kuznets and Structural Change; Role of Agriculture
Discuss the inverted 'U' shaped hypothesis by Kuznets in describing the relationship between inequality and economic growth. How is this hypothesis useful for developing countries?
हिंदी में प्रश्न
असमानता व आर्थिक वृद्धि के मध्य सम्बन्ध का वर्णन करने के लिए कुज़नेट्स के उल्टे 'U' आकार के वक्र की परिकल्पना का वर्णन कीजिए। विकासशील देशों के लिए यह परिकल्पना किस प्रकार लाभकारी है?
Practise this question Economic Development notes
Model answer
Paper and question: Paper I, Q8(b)
Approach: State Kuznets's hypothesis and its mechanism with the inverted-U diagram, review the evidence, then explain its usefulness and limits for developing countries.
Simon Kuznets, in 'Economic Growth and Income Inequality' (1955), suggested that income inequality first rises and then falls as income per head grows: an inverted U.
Mechanism: development shifts workers from a low-income, fairly equal agricultural sector to a high-income, more unequal urban-industrial sector. In the early stages a small modern sector widens the gap between sectors and inequality rises; as most workers move into the modern sector, as education spreads and as workers gain political power and social protection, inequality falls.
Diagram: income per head on the horizontal axis and the Gini coefficient on the vertical; an inverted-U curve rising to a peak at middle income and declining thereafter.
Evidence: cross-country data in the 1970s (Ahluwalia, 1976) seemed to support it, but time-series studies (Deininger and Squire, 1998) found little support within countries; East Asian economies grew fast with low inequality, and inequality has risen in most advanced countries since 1980 (Piketty, 2014).
Usefulness for developing countries: it warns that rising inequality in early growth is likely and should be anticipated; it highlights structural change, education and labour absorption as the forces that eventually reduce inequality; and it suggests policies such as land reform, mass education and social protection can shorten the rising phase. But it is not an iron law, so developing countries should not treat high inequality as a necessary price of growth.
Q8(c) · Theories of Growth · 15 marks≈ 11 min
Harrod-Domar Model
Distinguish between warranted rate of growth and natural rate of growth. Explain how knife-edge instability problem occurs in Harrod's model of economic growth.
हिंदी में प्रश्न
विकास की अपेक्षित दर तथा प्राकृतिक दर में अन्तर कीजिए। समझाइए कि किस प्रकार हैरोड के आर्थिक वृद्धि के मॉडल में चाकू की धार अस्थिरता की समस्या उत्पन्न होती है।
Practise this question Theories of Growth notes
Model answer
Paper and question: Paper I, Q8(c)
Approach: Define and distinguish Gw and Gn (meaning, determinants, nature), then explain the knife-edge between actual and warranted growth with its mechanism.
Warranted rate (Gw): in Harrod's model (1939) it is the growth rate at which entrepreneurs are satisfied that they have invested the right amount, so that saving equals desired investment and the actual capital-output ratio equals the required ratio Cr: Gw = s/Cr. It depends on behaviour (saving propensity and technology).
Natural rate (Gn): the maximum rate permitted by labour-force growth and technical progress, Gn = n + λ; it maintains full employment and depends on demography and technology. Gw is an equilibrium of the goods market and capacity use, Gn a full-employment ceiling; there is no mechanism making them equal.
Knife-edge instability: the actual rate is given by the identity G·C = s. Suppose G exceeds Gw. Since s is the same, C must be below Cr: capital is short relative to output, so firms raise investment. Through the multiplier this raises demand and G further, pushing it even further above Gw. If G is below Gw, C exceeds Cr, firms have idle capacity, cut investment, demand falls and G falls further.
Diagram: growth rate on the vertical axis and time on the horizontal; a horizontal line at Gw; paths starting slightly above Gw diverge upwards and paths starting slightly below diverge downwards, like a ball on a knife's edge.
The instability arises because investment follows the accelerator (it responds to the gap between actual and required capital) while the capital-output ratio and saving ratio are fixed. Solow (1956) removed it with factor substitution.

UPSC Mains 2024 Economics Paper II