Growth

Economic Growth

• Definition: Economic growth refers to an increase in the production and consumption of goods and services, usually measured by Gross Domestic Product (GDP).

Economic Growth in China and India

• Between 2005 and 2015, China had an 8% GDP growth rate, while India achieved 5%.
• Resulted in over 650 million people rising out of poverty.
• Shift in concerns from basic survival to seeking better living conditions and job opportunities.
• Economic growth leads to wealth, health, and education improvements.
• No universal recipe detected for stimulating growth despite extensive research.

Historical Context of Economic Growth

• Modern Economic Growth: A relatively new phenomenon that began around the Industrial Revolution.
• Historical Trends:
  • Little to no growth recorded from 1000 BC to 1800 AD.
  • Post-1800, significant increases in economic activity with the industrial revolution.
  • In the past 50 years, global GDP per capita has quadrupled.

Real GDP and Population Growth

• Real GDP per capita Growth: Indicates potential quality of life by combining real GDP data with population data.
• Calculated as:
  $ext{real GDP per capita growth rate} = ext{nominal GDP growth rate} - ext{inflation rate} - ext{population growth rate}$
• Historical growth from 1800 has shown real GDP growing faster than population, leading to increased purchasing power (30 times greater than 200 years ago).

Compounding Economic Growth

• Growth builds upon itself over time, similar to compound interest in savings accounts.
• Small annual growth rates can lead to large increases in economic activity over time.
  • U.S. average annual growth in real GDP per capita was about 2% in the last century, leading to a ninefold increase from 1910 to 2015.

Estimating Future GDP

• Formula for estimating GDP in the future:
  $ext{GDP}<em>{ ext{Year A}} = ext{GDP}</em>{ ext{Year B}} imes (1 + ext{Growth rate})^{( ext{Year A} - ext{Year B})}$
• Example:
  • For France:
  • 2013 Real GDP per capita: $40,000
  • Growth rate: 2%
  • Calculation for 2015:
    ext{GDP}{2015} = 40,000 imes 1.02^2 \ ext{GDP}{2015} = 40,000 imes 1.0404 = 41,616

Rule of 70

• A shortcut to estimate the years it will take for an income to double, expressed as:
  $ext{Years until income doubles} = \frac{70}{ ext{real GDP growth rate}}$

Productivity and its Determinants

• Definition of Productivity: Measure of output per worker.
• Driving force behind growth; higher productivity leads to higher standard of living.
• Components of Productivity:
  • Physical Capital (K): Equipment and structures for production (e.g. factories, machinery).
  • Human Capital: Skills and knowledge of the workforce (e.g. education).
  • Natural Resources: Assets from the earth, divided into renewable and nonrenewable.
  • Technological Improvements (A): Innovations that enhance productivity.

Rates versus Levels of Growth

• Analogies illustrate the notion that a country can experience high growth rates while having low levels of capital or productivity.
  • Example: Vietnam (high growth, low levels) vs. Switzerland (high levels, low growth).

Accounting for Growth

• Growth can be understood through its components: gY = gA +
  gK + (1 -
  )gL
  • Where
  • $g_Y$: Growth rate of output
  • $g_A$: Growth rate of productivity
  • $g_K$: Growth rate of capital
  • $g_L$: Growth rate of labor.
• Example calculation reveals significant contributions from technological advances to overall GDP growth.

The Miracle Rice & Agricultural Advances

• Historical Case Study: The development of “miracle rice” during the Green Revolution.
• Led to doubled crop yields, allowing populations to transition from agriculture to industry.
• Supports claims of agriculture powering broader economic growth in Asia.

Convergence Theory

• Suggests poorer countries will grow faster than wealthier ones, eventually reaching similar growth rates, though not income levels.
• Growth varies with initial physical/human capital; poorer nations gain from additional investments more than wealthier nations.

Growth and Public Policy

• Effective policies promote growth through investment, education, technological development, and good governance.
• Investment Types:
  • Domestic Savings: From households, corporations, and government surpluses.
  • Foreign Investment: Can augment local capital when domestic savings are insufficient.

Trade-offs in Economic Growth Policies

• All countries face trade-offs in funding growth-promoting initiatives, especially low-income nations.
• Poverty Traps: Situations where poorer nations struggle to invest in growth, requiring external aid.

Environmental Impact of Industrial Growth

• Questions regarding the ethics of pollution for economic advancement, highlighting the contrasts in historical and modern approaches to pollution and regulations.