Economics Notes on GDP, Economic Growth, and Malthusian Theory

GDP and GDP Per Capita

  • GDP (Gross Domestic Product)
    • Definition: Measure of the market value of the output of new final goods and services produced within an economy during a specified period.
  • GDP Per Capita
    • Definition: A measure of average disposable income per person, calculated as total income minus taxes and government transfers.
    • Formula for calculation:
      \text{GDP per Capita} = \frac{\text{GDP (in millions)}}{\text{Population (in thousands)}} \times 1000
    • Example Calculation:
    • Indonesia:
      • GDP = 1,319,100 million USD, Population = 275,501 thousand
      • GDP per Capita = \frac{1,319,100}{275,501} \times 1000 = 4,788\ USD
    • Jamaica:
      • GDP = 17,098 million USD, Population = 2,827 thousand
      • GDP per Capita = \frac{17,098}{2,827} \times 1000 = 6,048\ USD
    • Kenya:
      • GDP = 113,420 million USD, Population = 54,027 thousand
      • GDP per Capita = \frac{113,420}{54,027} \times 1000 = 2,099\ USD

Economic Growth and Measurements

  • Real GDP Per Capita Growth Rate
    • Definition: Measures how the average standard of living in a country is improving over time, adjusted for inflation.
    • Calculation of Growth Rate:
      \text{Growth Rate} = \frac{\text{Second Year Value} - \text{First Year Value}}{\text{First Year Value}} \times 100
    • Example:
    • Real GDP per Capita in 2019 = 47,235.023 USD, 2020 = 42,187.803 USD
    • Growth Rate = \frac{42,187.803 - 47,235.023}{47,235.023} \times 100 = -10.7\%

Key Economic Institutions promoting Growth

  • Financial Institutions: Banks and credit systems facilitate financial transactions and investment.
  • Education Institutions: Schools and universities promote human capital development.
  • Legal Systems: Establishing rule of law ensures stability and promotes trust in economic transactions.
  • Private Property Rights: Allow individuals and businesses to own and control their resources.
  • Political Stability: Encourages investment and economic growth.
  • Stable Money and Prices: Reduces uncertainty and promotes savings and investments.

Capitalism and Economic Organizations

  • Main Economic Institutions of Capitalism:
    • Private property rights
    • Markets for goods and services
    • Firms, which are organizations owned privately to produce goods and services
  • Examples of Firms: Local bakery, independent plumber, etc.
  • Examples of Non-Firms: Nonprofits (e.g., Red Cross), public education, households.

Diminishing Average Product of Labor

  • Commonly observed phenomenon in activities like farming, where adding labor leads to lower productivity per worker due to limited resources (land).
  • Malthusian Models:
    • Predict that as population expands, living standards may increase but eventually lead to diminishing returns in productivity due to finite resources.
    • Three Conditions to Stay in Malthusian Trap:
    1. Diminishing average product of labor
    2. Wages must not rise sufficiently in response to population growth
    3. Rate of technological improvement must not offset diminishing returns.

Malthus and Economic Predictions

  • Why Malthus was Wrong:
    • Overlooked the impact of technology on productivity and resource availability.
  • Modern Concerns: Current discussions about sustainability and resources echo Malthusian fears of collapse and resource limitation due to climate change and biodiversity loss.