Comprehensive Macroeconomics Revision Notes

FOREWORD & STRUCTURE OF THE BOOK

• The textbook is organised in 6 core chapters preceded by an Introduction and followed by a Glossary.
• Sequence: NATIONAL INCOME ACCOUNTING → MONEY & BANKING → INCOME DETERMINATION → GOVERNMENT: FUNCTIONS & SCOPE → OPEN-ECONOMY MACROECONOMICS.
• Each chapter builds cumulatively: Concepts ↔ Measurement ↔ Policy tools ↔ Real-world relevance.

INTRODUCTION TO MACROECONOMICS

• Macroeconomics ≠ Microeconomics: deals with aggregates (output, price level, employment), not individual markets.
• Representative good/device: simplifies analysis because many prices/output levels move together.
• Sectoral disaggregation: sometimes necessary (agriculture vs industry; households, firms, government, external sector).
• Economic agents = decision-makers (consumers, producers, govt., RBI, SEBI…).
• Keynesian Revolution (1936 – The General Theory) → birth of modern macro after the Great Depression.
• Capitalist economy defined by: (a) private ownership of means of production, (b) production for market sale, (c) wage labour.
• Four sectors in macro models: Households, Firms, Government, External.
• Key questions: inflation? unemployment? welfare indicators? state interventions?

NATIONAL INCOME ACCOUNTING

Basic Concepts

• Final vs Intermediate goods: Final goods consumed or used as capital; intermediate goods fully used up.
• Consumption goods: non-durables + services; Consumer durables: TVs, cars.
• Capital goods: long-lived inputs (machines, buildings).
• Stocks vs Flows: Capital stock (point-in-time) vs Investment flow (per period).
• Depreciation (Consumption of Fixed Capital) D=\frac{\text{Cost}}{\text{Service Life}}; Net Investment = Gross – Depreciation.
• Inventories: planned/unplanned △ in stock valued as investment.

Three calculation methods (must coincide ex post)

  1. Product / Value-Added GDP=\sum{i=1}^{N}GVAi where GVAi=Qi - Z_i.

  2. Expenditure GDP=C+I+G+X-M (closed economy → C+I only).

  3. Income GDP=W+P+In+R (wages, profits, interest, rent).

Key Identities

• Savings–Investment: S+T=I+G+(X-M).
• Budget deficit: (G-T); Trade deficit: (M-X).

Price indices

• Nominal vs Real GDP; GDP-deflator =\frac{GDP{nom}}{GDP{real}}\times100.
• CPI & WPI differences: basket, inclusion of imports, weights.

Income sub-aggregates

• GNP=GDP+NFIA.
• NNP=GNP-D.
• NI=NNP_{mp}-\text{Net Indirect Taxes}.
• Personal Income (PI) & Personal Disposable Income (PDI): adjust NI for undistributed profits, corporate taxes, transfers, personal taxes.

MONEY AND BANKING

Functions of Money

• Medium of Exchange, Unit of Account, Store of Value.

Demand for Money

• Transaction motive MT =kPY. • Velocity v=1/k ⇒ vMT=PY.
• Speculative motive MS=\max\left(0,\;\frac{r{max}-r}{r-r{min}}\right) ; liquidity trap at r=r{min}.
• Total M^d=kPY+M_S.

Supply of Money

• High-Powered Money H=CU+R; Money Multiplier m=\frac{1+cdr}{cdr+rdr}; M=mH.
• Narrow money M1=CU+DD ; Broad money M3=M1+\text{time deposits}.
• Creation via fractional reserve banking; CRR & SLR influence rdr.

Monetary Policy Instruments (RBI)

• Open-market operations, Bank Rate, CRR/SLR changes, Sterilisation of forex inflows.
• RBI as lender of last resort, banker to Government.

INCOME DETERMINATION (Closed Price)

• Consumption function C=C0+cY; $c$ = MPC. • Planned Aggregate Demand AD=C+I+G. • Equilibrium Y=AD ⇒ Y^*=\frac{1}{1-c}(C0+I+G).
• Multiplier k=\frac{1}{1-c}.
• Paradox of thrift: ↑MPS ⇒ ↓Y ⇒ saving unchanged.

THE GOVERNMENT: FUNCTIONS & SCOPE

• Allocation (public goods), Distribution (tax-transfer), Stabilisation (fiscal policy).
• Budget components:
– Revenue A/c: Tax + Non-tax receipts, Revenue expenditure.
– Capital A/c: Capital receipts (borrowings, recovery of loans, disinvestment) & Capital expenditure.
• Deficits:
– Revenue Deficit RD=RE - RR.
– Fiscal Deficit FD=TE - (RR + NDCR).
– Primary Deficit PD=FD-\text{Interest payments}.
• Multipliers:
– Government spending kG=\frac{1}{1-c}. – Tax kT=-\frac{c}{1-c} (lump-sum), smaller than k_G.
– Balanced Budget Multiplier = 1.
• FRBMA targets: eliminate RD, cap FD at 3\% of GDP.

OPEN-ECONOMY MACROECONOMICS

BoP structure

• Current A/c = Trade (X-M) + Invisibles + Transfers.
• Capital A/c = Net capital flows (FDI, FII, loans).
• Overall BoP ➔ change in reserves (autonomous + accommodating).

Exchange-rate regimes

• Flexible: e market-determined; depreciation/appreciation.
• Fixed/Pegged: central bank buys/sells forex; devaluation/revaluation.
• Managed float (dirty float): selective intervention.
• Purchasing Power Parity R=\frac{eP_f}{P} long-run anchor.

Open-economy model

• Import function M=M0+mY; NX = X - M. • Equilibrium Y=\frac{1}{1-c+m}(C0+I+G+X-M0). • Open-economy multiplier ko=\frac{1}{1-c+m}<k{closed}. • Twin Deficits: NX=(Sp-I)+(T-G).

GLOSSARY & CRITICAL TERMS

• High-Powered Money (H), Money Multiplier (m).
• Liquidity Trap, Speculative Demand, Velocity of Circulation.
• Gross vs Net Investment, Depreciation.
• Fiscal vs Revenue Deficit, Primary Deficit.
• Paradox of Thrift, Ricardian Equivalence.
• PPP, Real vs Nominal Exchange Rate.

IMPORTANT EQUATIONS AT ONE GLANCE

• GDP=C+I+G+X-M
• S=I+NX
• k{closed}=\frac{1}{1-c} ; k{open}=\frac{1}{1-c+m}
• FD=TE-(RR+NDCR) ; PD=FD-Int
• m=\frac{1+cdr}{cdr+rdr} ; M=mH
• \text{Real ER}=\frac{eP_f}{P}

PRACTICAL CHECKLIST FOR EXAM PREP

• Be able to compute GDP by all three methods, adjust to GNP, NNP, NI.
• Practice multiplier numericals: government spending, tax, open-economy.
• Draw & interpret AD-AS in closed vs open cases, show trade deficit.
• Track relationship between deficits and debt: impact of interest payments.
• Trace money creation cycle; calculate effect of CRR changes on M.
• Explain policy mix: fiscal-monetary-exchange-rate interactions.
• Use glossary for precise technical definitions. Good luck!