National Income Accounting

Gross Domestic Product (GDP): • GDP is the total market value of all final goods and services produced within the geographical boundaries of a country during a given period (usually one year), regardless of the nationality of the producers. • 'Gross' = includes depreciation (capital consumption). 'Domestic' = within the country's borders. Gross National Product (GNP): • GNP is the total market value of all final goods and services produced by the normal residents of a country, wherever they are located, during a given period. • GNP = GDP + Net Factor Income from Abroad (NFIA) • NFIA = Factor income received from abroad − Factor income paid to foreigners • If NFIA is positive → GNP > GDP (e.g., countries with many workers abroad sending remittances). • If NFIA is negative → GNP < GDP. Other related concepts: • NDP (Net Domestic Product) = GDP − Depreciation • NNP (Net National Product) = GNP − Depreciation = National Income at market prices • National Income (NI) = NNP at factor cost = NNP at market prices − Net Indirect Taxes Three Methods of Measuring National Income: 1. Product/Output Method (Value Added Method): • Sum the value added by each firm/sector at each stage of production. • Value Added = Value of Output − Value of Intermediate Inputs. • Avoids double counting — counts only the value added at each stage. 2. Income Method: • Sum all factor incomes earned in the economy: wages + rent + interest + profit + mixed income. • National Income = Compensation of Employees + Rent + Interest + Profit + Mixed Income. 3. Expenditure Method: • Sum all final expenditures in the economy. • GDP = C + I + G + (X − M) where C = private consumption, I = investment, G = government spending, X = exports, M = imports. All three methods, correctly applied, give the same result (the equivalence of income, output, and expenditure).

Nominal GDP: • Nominal GDP measures the total output of an economy valued at current market prices (the prices prevailing in the year of measurement). • It can increase either because actual production increased OR because prices increased. • Nominal GDP = Σ (Pt × Qt), where Pt = current year price, Qt = current year quantity. Real GDP: • Real GDP measures total output valued at the prices of a base year — i.e., price changes are removed. • It reflects only changes in actual physical output, not price changes. • Real GDP = Σ (P0 × Qt), where P0 = base year price, Qt = current year quantity. GDP Deflator: • The GDP deflator is a price index that measures the average price level of all goods and services included in GDP. • GDP Deflator = (Nominal GDP / Real GDP) × 100 • It shows how much of the change in nominal GDP is due to price changes (inflation) rather than real output growth. • Example: If nominal GDP doubled but real GDP only grew 20%, then the GDP deflator rose by about 67% — most of the nominal increase was just inflation. Why Real GDP is better for measuring economic growth: • Nominal GDP is misleading because it rises with inflation even if nothing more is being produced. • Real GDP strips out inflation, showing whether the economy actually produced more goods and services. • To compare economic performance across years (especially periods of high inflation), real GDP provides a meaningful measure. • Example: If India's nominal GDP grew from ₹100 lakh crore to ₹110 lakh crore but inflation was 10%, real GDP growth is approximately 0% — living standards did not improve. • GDP per capita (real GDP ÷ population) is commonly used to compare living standards across countries and over time.

While GDP is the most widely used measure of economic activity, it has significant limitations as a measure of welfare or well-being: 1. Does not account for distribution: • GDP tells us the total income, not how it is distributed. A high GDP country may have extreme inequality — the average person's welfare may be much lower than the GDP per capita suggests. • Example: A country where GDP grows only because a small elite gets richer is not 'better off' for most people. 2. Does not account for non-market activities: • GDP excludes unpaid work — housework, childcare, voluntary community work — which contributes enormously to human welfare but is not transacted in markets. 3. Does not account for environmental degradation: • GDP counts cutting down forests or depleting oil reserves as production — without accounting for the loss of natural capital. • GDP growth achieved by polluting air and water is not genuine welfare improvement. 4. Does not capture quality of life: • GDP does not measure health, education, life expectancy, personal safety, freedom, or happiness — all of which are important to well-being. 5. Does not account for leisure: • A country where people work fewer hours may have lower GDP but higher welfare (more leisure time). 6. Does not distinguish between 'good' and 'bad' spending: • GDP treats all spending equally — spending on hospitals and spending on repairing damage from natural disasters both add to GDP, but their welfare implications are very different. Alternative/Complementary Measures: 1. Human Development Index (HDI): Combines income (GNI per capita), education (years of schooling), and health (life expectancy). Published by UNDP. 2. Genuine Progress Indicator (GPI): Adjusts GDP for income distribution, environmental damage, and non-market activities. 3. Gross National Happiness (GNH): Developed in Bhutan — measures psychological well-being, cultural preservation, governance, and ecological resilience. 4. Multidimensional Poverty Index (MPI): Measures poverty across health, education, and living standards. 5. Gini Coefficient: Measures income inequality.