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Economics 3% exam weight

Introduction to Economics

Part of the CMA Foundation study roadmap. Economics topic econom-001 of Economics.

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Introduction to Economics

🟢 Lite — Quick Review (1h–1d)

Rapid summary for last-minute revision before your CMA Foundation exam.

Economics studies how societies allocate scarce resources among competing uses to satisfy unlimited wants. The discipline splits into microeconomics (individual units: consumers, firms, markets) and macroeconomics (aggregate output, prices, employment). Every CMA Foundation paper assumes the central problems: what, how, and for whom to produce, plus how to sustain growth.

  • Scarcity → Choice → Opportunity Cost: every decision to use a resource for one purpose forgoes the next-best alternative.
  • Factors of production: Land, Labour, Capital, Entrepreneurship — Land and Labour earn rent and wages; Capital earns interest; Entrepreneurship earns profit.
  • Profit-maximising rule: MR = MC, provided MC is rising (second-order condition). Under perfect competition, AR = MR = P.

🟡 Standard — Regular Study (2d–2mo)

Standard content for students with a few days to months.

Core Branches and Central Problems

Positive economics describes what is (factual, testable); normative economics prescribes what ought to be (value-laden). The economy must answer four questions — what goods to produce, how (which technique), for whom (income distribution), and how to sustain efficiency over time. These choices are coordinated through the price mechanism in a market economy.

Consumer and Producer Behaviour

Utility is the satisfaction from consumption. The Law of Diminishing Marginal Utility states MU falls as more units are consumed. Consumer’s equilibrium requires MUx/Px = MUy/Py. Producers maximise profit where MR = MC (with rising MC), and break-even occurs where AR = AC. A firm earns supernormal profit when P > AC and incurs loss when P < AVC in the short run.

Market Equilibrium

Demand (inverse relation with price) and supply (direct relation) intersect to fix equilibrium price P* and quantity Q*. Shifts occur from income, tastes, input costs, technology, taxes, and subsidies. Elasticity measures responsiveness:

ElasticityFormulaInterpretation
Price Ed%ΔQd / %ΔP>1 elastic, =1 unitary, <1 inelastic
Price Es%ΔQs / %ΔPDepends on production flexibility
Cross Ed%ΔQx / %ΔPyPositive = substitutes, negative = complements
  • Ed uses absolute values; always use %ΔQd/%ΔP, not its reciprocal.
  • Tax incidence falls more on the less elastic side of the market.

🔴 Extended — Deep Study (3mo+)

Comprehensive coverage for students on a longer study timeline.

National Income Accounting

GDP at market price (GDPmp) = C + I + G + (X − M). Converting to other measures:

MeasureConversion
GDPfcGDPmp − Net Indirect Taxes (NIT)
GNPmpGDPmp + NFIA
NNPfcGNPmp − Depreciation − NFIA
Personal IncomeNNPfc − retained earnings − corp. tax + transfer payments
Disposable IncomePI − Direct taxes

Worked example: GDPmp = ₹1,200 cr; Depreciation = ₹80 cr; NFIA = (−)₹20 cr; NIT = ₹100 cr. Then GNPmp = 1,200 + (−20) = ₹1,180 cr; NNPfc = GNPmp − Dep − NIT = 1,180 − 80 − 100 = ₹1,000 cr.

Inflation, Money, and Policy

Inflation erodes purchasing power; unexpectedly high inflation benefits borrowers, harms lenders. M1 = Currency + Demand Deposits + Other Deposits with RBI. RBI’s monetary tools: bank rate, repo rate, reverse repo rate, CRR, SLR, OMO, margin requirements. Fiscal policy uses government expenditure and taxation; the multiplier is k = 1/(1 − MPC).

Exam Strategy and Practice Prompts

CMA Foundation typically frames 3–5 direct items per attempt as MCQs (1 mark) plus a few 2-mark numerics on elasticity, equilibrium, or GDP/NNP conversions. Watch the difference between change in demand (curve shifts) and change in quantity demanded (movement along).

  1. If Ed = 0.6, a 10% price rise causes quantity demanded to fall by 6% (use |%ΔQd| = Ed × %ΔP).
  2. Compute NNPfc given GDPmp = ₹2,000 cr, Depreciation = ₹120 cr, NFIA = ₹50 cr, Indirect Taxes = ₹200 cr, Subsidies = ₹50 cr → NIT = ₹150 cr; NNPfc = (2,000 + 50) − 120 − 150 = ₹1,780 cr.

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