Economics · Chapter 04

📊 National Income

GDP, GNP, NNP, national income measurement methods.

📊 Measuring a Nation's Wealth

National Income is the total money value of all goods and services produced by the residents of a country in a year.

Key measures (the chain):
1. GDP (Gross Domestic Product) — value of all goods/services produced within India in a year
2. GNP = GDP + Net Factor Income from Abroad (NFIA)
3. NNP (Net National Product) = GNP − Depreciation
4. NNP at Market Price = NNP (at market prices)
5. NNP at Factor Cost = NNP at Market Price − Net Indirect Taxes = National Income (NI)
6. Personal Income = NI − Corporate taxes − Undistributed profits + Transfer payments
7. Disposable Income = Personal Income − Personal taxes

📐 Three methods of measuring GDP

1. Production/Output Method (Value Added Method)
Sum of value added at each stage of production. Avoids double counting. GDP = Sum of (Output − Intermediate consumption) across all sectors.

2. Income Method (Factor Cost Method)
Sum of all factor incomes: Wages + Rent + Interest + Profit

3. Expenditure Method (Final Demand Method)
GDP = C + I + G + (X − M)
C = Private Consumption, I = Investment, G = Government spending, X = Exports, M = Imports

India GDP growth — one of world's fastest growing economies
India GDP growth — one of world's fastest growing economiesWikimedia Commons / CC BY-SA 3.0
Indian Parliament — where Union Budget is presented annually
Indian Parliament — where Union Budget is presented annuallyWikimedia Commons / CC BY-SA 3.0
🇮🇳 India GDP facts — SSC/Banking

• India GDP (2023-24): ~₹293 lakh crore (~$3.7 trillion)
• GDP growth (2023-24): ~8.2% — fastest large economy
• India rank: 5th largest economy by nominal GDP
• By PPP: 3rd largest (after USA and China)
• Per capita GDP: ~$2,500 (nominal) — low-middle income country
• CSO (Central Statistics Office, now called NSO) calculates India GDP
• Base year for current GDP series: 2011-12

🎬

The National Income Chain

Animation
GDP → GNP → NNP → NATIONAL INCOME — CLICK EACH GDP Production within borders + Net NFIA Factor income from abroad = GNP Production by Indian nationals − Depreciation CCA (Capital Consumption Allow.) ↓ NNP at Market Price Net National Product GNP minus wear and tear of capital ↓ − Net Indirect Taxes NATIONAL INCOME (NI) = NNP at Factor Cost India FY2023-24: ~₹293 lakh crore CLICK ANY BOX National Income measures the economic output of a nation adjusted for foreign income and depreciation.

GDP → GNP → NNP → NI — each step adjusts for one factor. Click each box to understand why.

💹

GDP Comparison — India vs World

Interactive
1stUSA — $27 trillion
2ndChina — $18 trillion
3rdGermany — $4.5 trillion
4thJapan — $4.2 trillion
5thIndia — $3.7 trillion (2023)
Practice (SSC/Banking): What is the difference between GDP at Market Price and GDP at Factor Cost?
GDP at Market Price = value of output measured at prices consumers pay in the market. This includes indirect taxes (GST, excise) but not subsidies.

GDP at Factor Cost = value of output measured at the cost of factors of production (land, labour, capital). This excludes indirect taxes but includes subsidies.

Formula: GDP at Factor Cost = GDP at Market Price − Net Indirect Taxes
Where: Net Indirect Taxes = Indirect Taxes − Subsidies

Example: If a kg of sugar is sold at ₹45 (market price) but costs ₹40 to produce (factor cost), and the ₹5 difference is GST — then market price > factor cost by the tax amount.

Note: India switched to a new GDP series in 2015 where GVA (Gross Value Added) at basic prices is now used instead of GDP at factor cost. GVA at basic prices = Market price − Product taxes + Product subsidies.
Practice (SSC): What is PPP (Purchasing Power Parity)? Why does India rank higher on PPP than nominal GDP?
PPP (Purchasing Power Parity) is a method of comparing economies that adjusts for differences in price levels between countries. Instead of using exchange rates, it uses the concept of how much goods and services $1 can buy in different countries.

Why India ranks higher on PPP:
• A haircut costs $15 in USA but ₹150 ($1.80) in India — both are haircuts of similar quality
• On PPP, India gets more "real" output per dollar because Indian prices are lower
• India GDP at PPP: ~$14 trillion = 3rd largest in the world (after USA and China)
• India GDP at nominal exchange rate: ~$3.7 trillion = 5th largest

Which to use?
• Nominal GDP — for international trade comparisons, debt levels
• GDP at PPP — for comparing living standards and economic size more accurately

The IMF recommends PPP for comparing economic size. The World Bank uses it to determine eligibility for aid programs.
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