Economic Growth: Principles, Patterns, and Theories in Macroeconomics

Technological Change, Creative Destruction, and Rising and Falling Firms

Introduction to Creative Destruction

Economic growth and technological change often lead to the rise and fall of firms and industries. The concept of creative destruction describes how innovation can make existing products or firms obsolete, as seen in the case of Blockbuster Video being replaced by new services like Netflix.

• Creative destruction: The process by which new innovations destroy old industries and create new ones.

• Example: Blockbuster Video's decline due to competition from streaming services.

Economic Growth

Understanding Economic Growth

Economic growth refers to the sustained increase in a country's output of goods and services over time, typically measured by real GDP per capita. Growth is not guaranteed and has varied across countries and historical periods.

• Real GDP per capita: Real Gross Domestic Product divided by the population; a key measure of average living standards.

• Some countries have experienced rapid growth, while others have stagnated.

Growth Over Time and Around the World

Historical Patterns of Growth

For most of human history, living standards remained largely unchanged. Significant economic growth began only in the last two centuries, especially after the Industrial Revolution.

• Before 1800, the standard of living was essentially the same as it had been for centuries.

• Since the Industrial Revolution, many countries have experienced sustained increases in real GDP per capita.

Annual Growth Rates for the World Economy

Growth rates in real GDP per capita have varied over time, with notable increases after the Industrial Revolution.

Period	Annual Growth Rate (%)
1 C.E. - 1000	0.0
1000-1820	0.05
1820-1870	0.62
1870-1950	1.01
1950-2000	2.20
2000-2021	1.61

• Even small differences in growth rates can lead to large differences in living standards over time.

• For example, over 50 years, a 1.61% growth rate leads to a 122% increase in real GDP per capita, while a 2.2% rate leads to a 197% increase.

The Industrial Revolution

Origins and Impact

The Industrial Revolution marked the beginning of sustained economic growth, starting in England around 1750. It involved the application of mechanical power to production, replacing human and animal labor.

• Industrial Revolution: The transition to new manufacturing processes using machines, leading to increased productivity and economic growth.

• Spread to other countries such as the United States, France, and Germany.

Why Did the Industrial Revolution Begin in England?

According to Douglass North, the Glorious Revolution of 1688 was a turning point that established property rights and limited the power of the monarchy, creating a favorable environment for investment and innovation.

• Parliament controlled taxation and government spending, and the court system became independent.

• These changes incentivized entrepreneurs to invest in new technologies.

Effects of Different Growth Rates on Living Standards

Comparing Countries

Small differences in growth rates can lead to significant differences in living standards over time. Countries with slow growth may experience higher poverty, lower life expectancy, and higher infant mortality.

• High-income countries (e.g., Western Europe, US, Canada) have much higher GDP per capita than low-income countries.

• Some countries, like Singapore and South Korea, have rapidly increased their income levels.

Determinants of Economic Growth

Labor Productivity

The key to long-run economic growth is increases in labor productivity, defined as the quantity of goods and services produced by one worker or one hour of work.

• Two main factors affect labor productivity:

  • Quantity of capital per hour worked

  • Level of technology

Technological Change

Technological change refers to improvements in the ability to produce more output with the same amount of inputs.

• Sources include new machinery, human capital (education and skills), and better management practices.

• Example: The just-in-time system developed by Toyota.

The Per-Worker Production Function

The per-worker production function shows the relationship between real GDP per hour worked and capital per hour worked, holding technology constant.

• Initial increases in capital per worker lead to large increases in output, but subsequent increases yield diminishing returns.

• Diminishing returns: Each additional unit of capital adds less to output than the previous unit.

Role of Technological Change in Growth

Technological change can overcome diminishing returns to capital and is essential for sustained long-run growth.

• In countries with low capital, increasing capital is effective; in high-capital countries, technological change is more important.

• Technological change can include new inventions, improved processes, or better organizational methods.

Economic Growth Theories

Solow Growth Model

The Solow model explains long-run growth in terms of capital accumulation and technological progress, but treats technological change as exogenous (outside the model).

• Developed by Robert Solow in the 1950s.

• Emphasizes the importance of savings, investment, and technological progress.

New Growth Theory

New growth theory, developed later, emphasizes that technological change is driven by economic incentives and is endogenous (determined within the model).

• Focuses on the accumulation of knowledge capital through research and development (R&D), education, and innovation.

• Knowledge capital is nonrival and nonexcludable, leading to increasing returns at the economy-wide level.

Government's Role in Knowledge Capital

• Protecting intellectual property with patents and copyrights

• Subsidizing research and development

• Supporting education and training

Schumpeter and Creative Destruction

Entrepreneurship and Innovation

Joseph Schumpeter emphasized the role of entrepreneurs in driving economic growth through innovation and creative destruction.

• Entrepreneurs combine factors of production in new ways, leading to new products and industries.

• Creative destruction replaces outdated firms and technologies with new, more efficient ones.

Growth in the United States

Historical Growth Patterns

The United States has experienced varying growth rates over time, with significant increases during periods of technological innovation and government investment in R&D.

• Growth was moderate before 1900, increased in the 20th century, and slowed after the mid-1970s.

• Recent debates focus on whether slow growth is temporary or permanent.

Role of Information Technology

• IT has driven productivity improvements since the 1990s.

• Some economists argue that official statistics understate improvements in living standards due to unmeasured quality changes in services.

Catch-Up and Convergence

Catch-Up Effect

The economic growth model predicts that poorer countries should grow faster than richer ones, leading to convergence in income levels.

• Catch-up is more evident among high-income countries than globally.

• Some countries have not caught up due to institutional and structural barriers.

Barriers to Catch-Up

• Rigid labor markets and heavy regulation

• Lack of creative destruction and innovation

• Inefficient financial systems

Why Some Low-Income Countries Grow Slowly

Key Factors

• Lack of rule of law and property rights

• Political instability and revolutions

• Poor public education and health

• Low rates of saving and investment

Role of Institutions

Strong institutions, such as independent courts and protection of property rights, are essential for economic growth.

• Corruption and weak legal systems discourage investment and entrepreneurship.

Globalization and Growth

Effects of Globalization

Globalization, the process of increasing economic integration, has allowed many countries to grow faster by attracting foreign investment and expanding trade.

• Foreign direct investment (FDI): Investment by a firm in a foreign country (e.g., building a factory).

• Portfolio investment: Purchase of stocks or bonds issued in another country.

Policies to Promote Economic Growth

Summary of Growth Policies

• Establish property rights and rule of law

• Invest in health and education

• Encourage technological change

• Promote savings and investment

Limits and Debates on Economic Growth

Is Economic Growth Always Good?

While growth is generally beneficial, especially for low-income countries, some argue that it can have negative effects, such as environmental degradation, resource depletion, and loss of cultural identity.

• These debates are often normative and involve value judgments.

Key Terms and Formulas

• Real GDP per capita: $\text{Real GDP per capita} = \frac{\text{Real GDP}}{\text{Population}}$

• Labor productivity: $\text{Labor productivity} = \frac{\text{Real GDP}}{\text{Total hours worked}}$

• Growth rate formula: $\text{Growth rate} = \frac{\text{GDP}_{t} - \text{GDP}_{t-1}}{\text{GDP}_{t-1}} \times 100\%$

Sample Questions and Applications

• True or false: Moving from point A to point B on the per-worker production function shows the effect of technological change. False (it shows increased capital per worker).

• Which is the best measure of a country's standard of living? Real GDP per capita.

• Example of foreign direct investment: An American airline builds a hub in China.