Economics 2024 Paper I 50 marks Analyse

Q3

(a) Explain the concept of underemployment equilibrium with graphical illustration. Why full employment cannot be reached automatically in Keynes' approach? Analyse. (10+10=20 marks) (b) 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? (10+5=15 marks) (c) Critically analyse classical theory of interest. (15 marks)

हिंदी में प्रश्न पढ़ें

(a) रेखाचित्र के उदाहरण से अल्प-रोजगार संतुलन की अवधारणा को समझाइए। कौंस के दृष्टिकोण से पूर्ण रोजगार को स्वतः क्यों नहीं प्राप्त किया जा सकता है ? विस्लेषण कीजिए। (10+10=20 अंक) (b) नीचे दी हुई सूचनाओं के आधार पर संतुलित 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 मांग फलन : L = 0.4Y-0.5r सकल मुद्रा पूर्ति : M = 40 (करोड़ रुपये) जब मुद्रा की पूर्ति को ₹ 20 करोड़ बढ़ाया जाएगा, तब संतुलन मूल्यों में किस प्रकार परिवर्तन होगा? (10+5=15 अंक) (c) ब्याज के प्रतिष्ठित सिद्धांत का आलोचनात्मक विस्लेषण कीजिए। (15 अंक)

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Directive word: Analyse

This question asks you to analyse. The directive word signals the depth of analysis expected, the structure of your answer, and the weight of evidence you must bring.

See our UPSC directive words guide for a full breakdown of how to respond to each command word.

How this answer will be evaluated

Approach

Begin with a brief introduction contrasting classical and Keynesian macroeconomic frameworks. For part (a), spend approximately 35% of your effort explaining underemployment equilibrium with proper 45° line and aggregate demand diagrams, then analyse why wage-price flexibility fails to restore full employment due to effective demand deficiency. For part (b), allocate 30% to deriving IS and LM equations algebraically, solving for equilibrium Y and r, then showing the monetary expansion effect through LM shift. For part (c), use remaining 35% to critically examine classical interest theory, contrasting it with Keynes's liquidity preference and citing empirical limitations. Conclude by synthesising how these three parts illuminate the Keynesian revolution in macroeconomic policy.

Key points expected

  • Part (a): Underemployment equilibrium occurs when aggregate demand equals output below full employment level, shown by intersection of aggregate expenditure line with 45° line at Y* < Yf
  • Part (a): Full employment is not automatic because of (i) downward rigidity of money wages, (ii) liquidity trap, (iii) investment insensitivity to interest rates, and (iv) paradox of thrift—demonstrating breakdown of Say's Law
  • Part (b): Derivation of IS curve from goods market equilibrium: I = S+T-G, yielding Y = 120 - r; LM curve from money market: 40 = 0.4Y - 0.5r, yielding Y = 100 + 1.25r
  • Part (b): Simultaneous solution gives Y = 111.11 crore, r = 8.89%; with ΔM = +20, new LM shifts right, new equilibrium Y = 133.33 crore, r = 2.22% showing monetary policy effectiveness
  • Part (c): Classical theory treats interest as equilibrator of saving and investment at full employment; critique covers (i) circular reasoning in loanable funds, (ii) assumption of full employment, (iii) ignores speculative motive, (iv) indeterminacy without fixed money supply
  • Part (c): Keynes's liquidity preference as superior alternative—interest as reward for parting with liquidity, not abstinence; empirical relevance for India post-2008 crisis when rate cuts failed to stimulate investment

Evaluation rubric

DimensionWeightMax marksExcellentAveragePoor
Concept correctness22%11Precise definitions of underemployment equilibrium, effective demand, liquidity preference; correct identification of why Say's Law fails in (a); accurate derivation of IS-LM framework in (b); thorough critique of classical interest theory's assumptions in (c) including Wicksellian vs Fisherian distinctionsBasic understanding of Keynesian concepts but conflates underemployment with unemployment; attempts IS-LM derivation with algebraic errors; mentions classical theory without systematic critique of its circularity or full employment assumptionConfuses underemployment equilibrium with general equilibrium; fails to explain why automatic adjustment breaks down; major errors in IS-LM derivation; describes rather than critiques classical theory
Diagram / model20%10Clear 45° line diagram for (a) showing Y* < Yf with proper labels (C, I, AE, 45° line, vertical gap); IS-LM diagram for (b) with initial and shifted LM curves; optional loanable funds vs liquidity preference comparison diagram for (c); all diagrams self-drawn with axes, schedules, equilibrium points markedDiagrams present but poorly labelled or missing key elements (e.g., no Yf line in part a); IS-LM diagram without showing the monetary policy shift; diagrams described but not clearly drawnMissing diagrams for (a) or (b); diagrams copied without explanation; incorrect slopes (e.g., upward sloping IS or downward sloping LM)
Quantitative reasoning18%9Correct algebraic derivation of IS: Y = 120 - r and LM: Y = 100 + 1.25r; accurate simultaneous solution Y = 111.11, r = 8.89; correct new equilibrium after monetary expansion Y = 133.33, r = 2.22; calculates exact changes (ΔY = +22.22, Δr = -6.67) and interprets multiplier effectAttempts derivation with minor algebraic slips; gets approximately correct values; shows monetary expansion shifts LM right but calculates new equilibrium incorrectlyMajor errors in IS-LM derivation; incorrect substitution; fails to solve simultaneous equations; no calculation of post-expansion equilibrium
Indian / empirical examples18%9For (a): cites India's post-demonetization demand shock or COVID-19 output gap; for (b): references RBI's liquidity infusion during 2020-21 and its transmission to real economy; for (c): contrasts classical assumptions with India's informal labour market where interest rate channel is weak, citing Rangarajan or Urjit Patel committee findings on monetary policy effectivenessGeneric mention of Indian economy without specific episodes; vague reference to RBI policy without connecting to question specifics; no empirical validation for classical critiqueNo Indian examples; purely theoretical treatment; irrelevant examples (e.g., fiscal policy when question asks monetary)
Policy implication22%11For (a): explicit case for active fiscal policy (MGNREGA as automatic stabilizer) given wage-price rigidity; for (b): interprets monetary expansion results to advocate accommodative policy during demand deficiency, noting limitations when investment is interest-inelastic; for (c): policy conclusion that interest rate targeting requires liquidity management, supporting India's LAF/MLF framework; synthesizes all three parts into coherent Keynesian policy prescriptionMentions fiscal/monetary policy without clear linkage to analysis; generic statement that government should intervene; no synthesis across partsNo policy implications drawn; or suggests market solutions contrary to Keynesian framework; confuses fiscal and monetary policy recommendations

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