💰 ECONOMY — TEXTBOOK DEPTH (Line-by-Line, Every Sub-Topic)

The deep-dive companion to the Economy revision note. Covers National Income → Money & Banking → Inflation → Public Finance → External Sector → Sectors & Development. Update the numbers after every RBI policy and Budget — economy facts age fastest.

PART 1 — BASIC CONCEPTS & NATIONAL INCOME

1.1 Foundational ideas

Scarcity & opportunity cost: resources are limited; every choice has a foregone alternative. Production Possibility Frontier shows the trade-off; growth shifts it outward.
Types of economies: capitalist (market-led), socialist (state-led), mixed (India — public + private). Sectors: primary (agriculture), secondary (industry), tertiary (services); + quaternary (knowledge) and quinary (decision-making).
Growth vs development: growth = a quantitative rise in output; development = growth plus improvement in capabilities, equity and sustainability (Amartya Sen — the capability approach).

1.2 National income aggregates

GDP (Gross Domestic Product) = value of all final goods & services produced within the domestic territory in a year.
GNP = GDP + Net Factor Income from Abroad (NFIA).
NDP = GDP − depreciation (consumption of fixed capital); NNP = GNP − depreciation.
Market Price (MP) vs Factor Cost (FC): FC = MP − indirect taxes + subsidies. NNP at factor cost = National Income.
GVA (Gross Value Added) = GDP at MP − net product taxes; the production-side measure now emphasised.
Nominal vs Real GDP: real GDP uses constant (base-year) prices to remove the effect of inflation; the GDP deflator = (Nominal/Real) × 100.
Three methods of measurement: (i) Production/Value-Added, (ii) Income (wages + rent + interest + profit), (iii) Expenditure (C + I + G + (X − M)). In equilibrium all three are equal. In India, NSO/MoSPI computes these.

1.3 Planning & institutions

Planning history: the Planning Commission (1950) and Five-Year Plans (Harrod-Domar, then the Mahalanobis heavy-industry model in the 2nd Plan); rolling plans; indicative planning after 1991.
NITI Aayog (2015) replaced the Planning Commission — a think-tank promoting cooperative & competitive federalism; it does not allocate funds (that role moved to the Finance Ministry/Finance Commission).

PART 2 — MONEY & BANKING

2.1 Money & money supply

Functions of money: medium of exchange, measure of value, store of value, standard of deferred payment.
Money supply measures: M0 (reserve/high-powered money = currency + bankers' deposits with RBI) ⊂ M1 (narrow money = currency with public + demand deposits) ⊂ M2 ⊂ M3 (broad money = M1 + time deposits — the most-cited aggregate) ⊂ M4.
Money multiplier = the ratio by which a change in reserve money changes the total money supply.

2.2 The RBI & monetary policy

RBI functions: issuer of currency, banker to the government and to banks, custodian of foreign-exchange reserves, lender of last resort, regulator of the banking & payment systems, controller of credit.
Monetary Policy Committee (MPC): 6 members (3 RBI + 3 government-appointed); mandate = maintain CPI inflation at 4% ± 2%; sets the policy repo rate.
Quantitative (general) tools:
Repo rate — the rate at which the RBI lends to banks against securities (raising it → costlier credit → curbs inflation).
Reverse repo / SDF (Standing Deposit Facility) — the RBI absorbs liquidity.
MSF (Marginal Standing Facility) — emergency overnight borrowing above the repo rate.
CRR (Cash Reserve Ratio) — a % of deposits kept as cash with the RBI (earns no interest).
SLR (Statutory Liquidity Ratio) — a % of deposits kept by the bank itself in liquid assets (cash, gold, approved securities).
OMO (Open Market Operations) — the RBI buys/sells government securities to inject/absorb liquidity.
Bank rate — the long-term lending rate (linked to penalties on CRR/SLR shortfalls).
Qualitative tools: margin requirements, moral suasion, selective/directed credit control, consumer-credit regulation.
Policy stance: accommodative → neutral → withdrawal of accommodation → tightening.

2.3 The banking system & reforms

Structure: Scheduled Commercial Banks (public sector, private, foreign, RRBs), cooperative banks, small finance & payment banks; NBFCs.
Key concepts: NPA (Non-Performing Asset) = a loan overdue beyond 90 days; Twin Balance Sheet problem; Basel III capital-adequacy norms; PCA (Prompt Corrective Action) framework; SARFAESI Act and the Insolvency & Bankruptcy Code (IBC) 2016 for resolution; priority-sector lending; DICGC deposit insurance.
Financial inclusion: Jan Dhan accounts, the JAM (Jan Dhan-Aadhaar-Mobile) trinity, UPI / Digital Public Infrastructure, microfinance, self-help groups.

PART 3 — INFLATION

Definition: a sustained rise in the general price level (fall in the purchasing power of money).
Measurement in India: CPI (Consumer Price Index) — the policy anchor (retail; combined, rural, urban); WPI (Wholesale Price Index) — excludes services; the GDP deflator; core inflation (excludes volatile food & fuel).
Types by cause: demand-pull (too much money chasing too few goods) and cost-push (rising input costs). By rate: creeping, walking, galloping, hyperinflation; also deflation, disinflation, stagflation (high inflation + high unemployment), reflation.
Base effect: a low/high price level in the previous year distorts the current inflation rate.
The Phillips Curve: a short-run inverse relation between inflation and unemployment (breaks down in the long run).
Effects: hurts fixed-income earners and savers, helps borrowers; distorts investment; a mild, stable inflation is considered good for growth.

PART 4 — PUBLIC FINANCE & THE BUDGET

4.1 The Budget (Annual Financial Statement, Art 112)

Receipts: Revenue receipts (tax + non-tax — no liability, no reduction in assets) vs Capital receipts (borrowings, disinvestment, recovery of loans — create a liability or reduce assets).
Expenditure: Revenue expenditure (day-to-day, no asset created) vs Capital expenditure (creates assets — infrastructure, loans).

4.2 Deficits

Revenue deficit = revenue expenditure − revenue receipts.
Fiscal deficit = total expenditure − total receipts excluding borrowings = the government's total borrowing requirement.
Primary deficit = fiscal deficit − interest payments.
Effective revenue deficit = revenue deficit − grants for the creation of capital assets.
FRBM Act (2003): targets fiscal discipline; the N.K. Singh Committee recommended a debt-to-GDP anchor.

4.3 Taxation

Direct taxes (progressive; burden not shiftable): income tax, corporate tax. Indirect taxes (regressive; shiftable): GST, customs, excise.
GST (101st Amendment, 2016): a destination-based, multi-stage, value-added indirect tax; dual GST (CGST + SGST/IGST); slabs; the GST Council (Art 279A) — a constitutional body deciding by a 3/4 weighted vote; a compensation cess.
Concepts: cesses & surcharges (not shared with states); tax buoyancy & elasticity; the Laffer curve (very high rates can reduce revenue); tax expenditure; direct-tax reforms.
Fiscal federalism: the Finance Commission (Art 280) recommends the vertical (Centre↔states) and horizontal (among states) devolution of the divisible pool.

PART 5 — EXTERNAL SECTOR

Balance of Payments (BoP): Current Account (trade in goods + services + primary & secondary income/remittances) + Capital Account (FDI, FPI, ECBs, banking capital) + errors & omissions + change in reserves = 0. A Current Account Deficit (CAD) must be financed by capital inflows.
Exchange rate: fixed vs floating vs managed float (India). Depreciation/appreciation (market) vs devaluation/revaluation (official). REER/NEER measure competitiveness. Convertibility — current account fully convertible, capital account partially.
FDI vs FPI: FDI = lasting interest & control, stable, "brick-and-mortar"; FPI = portfolio flows, volatile "hot money".
Forex reserves: foreign-currency assets, gold, SDRs, and the reserve position in the IMF.
Trade & institutions: the WTO (successor to GATT; agreements on agriculture, TRIPS, TRIMS; the dispute-settlement mechanism); free-trade agreements; export promotion vs import substitution; the "twin deficits" (fiscal + current account).

PART 6 — SECTORS & DEVELOPMENT

6.1 Agriculture

Share of GDP falling but ~45% of employment; MSP (CACP), procurement, PDS, buffer stocks; subsidies (fertiliser, power, credit); APMC & e-NAM; the Green Revolution and the need for diversification; agricultural credit and insurance (PM Fasal Bima).

6.2 Industry & services

Industrial policy: the 1956 Resolution → LPG reforms (1991) (Liberalisation, Privatisation, Globalisation — delicensing, disinvestment, opening to FDI). Make in India, PLI schemes, MSMEs, Startup India; the Index of Industrial Production (IIP) (core sectors).
Services — the largest share of GDP (IT/ITeS, finance, tourism); India as a services exporter.

6.3 Development indicators & inclusion

Poverty: measured by the Tendulkar and Rangarajan lines and the Multidimensional Poverty Index (health, education, living standards).
Unemployment types: structural, frictional, cyclical, seasonal, disguised (surplus labour with near-zero marginal productivity — classic in agriculture); measured by the PLFS; LFPR.
Inequality: the Gini coefficient and the Lorenz curve.
HDI (UNDP): life expectancy + education (mean & expected years of schooling) + GNI per capita (PPP).
Inclusive growth: growth that reduces poverty and inequality and widens opportunity — via financial inclusion, skilling, social security, and the demographic dividend.

6.4 Key committees (know the subject)

Kelkar (FRBM/fiscal), N.K. Singh (FRBM review), Bimal Jalan (RBI economic capital/reserves), Nachiket Mor (financial inclusion), Urjit Patel (monetary framework → the MPC), U.K. Sinha (MSMEs).

📚 References & Further Reading

Reserve Bank of India · Union Budget & Economic Survey
NITI Aayog · Ministry of Finance / PIB
NCERT Economics (free PDF)
Standard: Ramesh Singh, NCERT Macroeconomics, Mrunal videos, the annual Economic Survey + Budget

Next in the deep-dive series: Environment.