Economic Growth and National Income Accounting Concepts

Economic Growth and GDP Basics

  • Gross Domestic Product (GDP): Value of all final goods/services produced in an economy within one year.

  • National Income Accounting: Measures economic activity.

  • GDP Measurement Approaches:

    • Expenditure Approach: Sum of Consumption + Government Spending + Investment + Net Exports.

    • Income Approach: Sum of Wages + Rent + Interest + Profit.

    • Both approaches should yield the same figure.

  • Value vs. Volume of GDP:

    • Value: Monetary worth.

    • Volume: Physical quantity.

Nominal, Real, and Per Capita GDP

  • Nominal GDP: Actual value unadjusted for inflation.

  • Real GDP: Nominal GDP adjusted for inflation.

    • For example, if nominal GDP is £100bn\pounds 100\text{bn} and inflation is 10%10\%, real GDP is £90bn\pounds 90\text{bn}.

  • GDP per Capita: GDP/Population\text{GDP} / \text{Population}.

    • Indicates mean wealth per resident, used for comparing living standards.

Gross National Income (GNI)

  • GDP measures production within a country's borders.

  • GNI: Total income earned by a country's residents and businesses, regardless of where generated.

    • Calculation: GDP + income received from abroad - income paid to non-residents.

    • Provides a more realistic view of national wealth, especially its residents' income.

  • GNI per Capita: Generally more realistic than GDP per capita for income analysis.

Comparing Economic Growth Across Countries

  • National income statistics allow comparisons of government policies, wealth, and living standards over time and between countries.

  • Best Comparison Metrics (in order of preference):

    • Real GDP: Accounts for inflation.

    • Real GDP per Capita: Accounts for inflation and population differences.

    • Real GNI per Capita: Most realistic, accounts for inflation, population, and cross-border income flows.

Purchasing Power Parities (PPP)

  • PPP: A conversion factor applied to GDP, GNI, or GNP.

    • Calculates the relative purchasing power of different currencies.

    • Shows how many units of a country's currency are needed to buy the same basket of goods as $1\$1 in a reference country (e.g., USA).

    • Purpose: To provide a more accurate comparison of living standards by adjusting for differing costs of goods and services.

    • Example: If a basket costs $150\$150 in Vietnam and $450\$450 in USA, the PPP is 1:31:3. Used to assess if higher per capita income translates to genuinely higher living standards after cost differences.