Study Notes on Production and Growth (Chapter 12)

Introduction

• PowerPoint Slides prepared by V. Andreea CHIRITESCU, Eastern Illinois University, based on N. Gregory Mankiw's "Principles of Macroeconomics" Eighth Edition.
• Focus on Chapter 12: Production and Growth, © 2018 Cengage Learning.
• Modified for ECON 102 by Dr. Sargsyan.

Overview of Key Themes

• This chapter addresses critical questions:
    - What are the facts about living standards and growth rates around the world?
    - Why does productivity matter for living standards?
    - What determines productivity and its growth rate?
    - How can public policy affect growth and living standards?

Income and Economic Growth Around the World

• Living standards (real GDP per person) show considerable variance globally.
• Variations in growth rates lead to changes in country income rankings over time:
    - Poor countries are not condemned to perpetual poverty.
    - Rich countries cannot assume their status is permanent.

Real GDP Data (2017 Dollars)

• Example Growth Data from Various Countries:
    - China:
      - Beginning: $794, End: $16,807, Growth Rate: 2.64% (1900-2017)
    - Japan:
      - Beginning: $1,667, End: $43,279, Growth Rate: 2.60% (1890-2017)
    - Brazil:
      - Beginning: $863, End: $15,484, Growth Rate: 2.50% (1900-2017)
    - Others include Mexico, Indonesia, Germany, Canada, India, Argentina, U.S., Pakistan, Bangladesh, and the U.K.
• Source for Data: Robert J. Barro and Xavier Sala-i-Martin, World Bank online data, and author’s calculations.

Questions on Incomes and Growth

• Investigations into:
    - Why some countries are wealthier than others.
    - The phenomenon of certain countries experiencing rapid growth while others remain stagnant.
    - Policies that could potentially increase growth rates and improve long-term living standards.

The Concept of Productivity

• Reference to one of the Ten Principles from Chapter 1:
    - A country's standard of living depends on its ability to produce goods and services.
• Definition of Productivity:
    - Productivity is defined as the average quantity of goods and services produced per unit of labor input:
      - $ext{Productivity} = \frac{Y}{L}$
        - Where:
          - $Y$ = real GDP (output produced)
          - $L$ = quantity of labor

Active Learning Example

• Cedar Valley Furniture:
    - Uses 5 workers for 8 hours to produce 80 chairs, resulting in:
      - Productivity = $\frac{80}{5 imes 8} = 2$ chairs per hour.
• Alpha Cabinet Company:
    - Produces 40 cabinets in 10 hours:
      - Productivity = $\frac{40}{10} = 4$ cabinets per hour.

Importance of Productivity

• When a nation’s workforce is highly productive:
    - Real GDP increases, resulting in higher incomes.
    - Growth in productivity leads to enhanced living standards.
• Main determinants of productivity are:
    - Physical capital
    - Human capital
    - Natural resources
    - Technological knowledge

Determinants of Productivity

1. Physical Capital:
      - Defined as the stock of equipment and structures used to produce goods and services.
      - Generally, productivity increases when the average worker has access to more physical capital.
2. Human Capital:
      - Refers to the knowledge and skills acquired through education, training, and experience.
      - More human capital generally corresponds to higher productivity.
3. Natural Resources:
      - Inputs into production provided by nature (e.g., land, rivers, mineral deposits).
      - More natural resources allow for increased output.
4. Technological Knowledge:
      - Represents society's understanding of optimal technology usage in production.
      - Enhancements in technology lead to increased productivity.

Differentiating Tech Knowledge vs. Human Capital

• Technological Knowledge:
     - Refers to society’s collective understanding of effective technology application.
     - Can be shared widely among multiple producers.
• Human Capital:
     - Result of individual effort towards knowledge acquisition, varies by individual.Essential for productivity.

Economic Growth and Public Policy

• Examination of how public policy influences long-run growth via productivity and living standards.

Saving and Investment Practices

• Enhancing productivity through increased investment in physical capital.
• Tradeoff: More physical capital requires reduced consumption, illustrated as:
    - Today's savings fund investments, leading to future consumption benefits.

Diminishing Returns and the Catch-Up Effect

• Growth in productivity is temporary due to diminishing returns to capital, where:
    - An increase in physical capital leads to a smaller incremental output increase.
• Catch-Up Effect: Poor countries tend to grow faster than wealthier ones due to lower capital stock starting points.

Example of the Catch-Up Effect

• Over the period 1960-1990:
    - U.S. and South Korea had comparable GDP investment shares.
    - However, South Korea achieved >6% growth vs. 2% for the U.S., attributed to the catch-up effect due to lower initial capital per worker in Korea.

Investment from Abroad

• Governments can facilitate capital stock improvement through:
    - Foreign Direct Investment: Capital investments (e.g., factories) owned by foreign entities.
    - Foreign Portfolio Investment: Investments financed by foreign money operated by locals.
• Benefits include technology transfer and input for growth in poorer nations.

Education and Human Capital

• Investment in human capital through education enhances productivity:
    - U.S. correlation: Each year of schooling increases wages by 10%.
• However, education investment indicates a tradeoff between immediate earnings and future gains.

Health and Nutrition as Investment

• Health investments enhance productivity, as healthier workers are more efficient:
    - Notable effect of improved nutrition on economic growth, exemplified by South Korea's significant caloric intake increase leading to economic growth.
    - Noted contribution of improved nutrition to U.K. growth historically.

Property Rights and Political Stability

• Effective markets depend on property rights; a system enabling resource ownership and authority.
• Legal system inefficacies in poor countries disrupt enforcement, leading to corruption and fraud.
• Property instability discourages investment and economic efficiency, thereby reducing living standards.

Free Trade Policies

• Inward-oriented policies (e.g., tariffs) versus Outward-oriented policies (e.g., removal of trade restrictions).
• Outward-oriented nations often achieve better growth outcomes compared to inward-oriented societies (historical examples: South Korea, Singapore, Taiwan).

Research and Development

• Technological progress drives long-term living standards.
• Knowledge as a public good, with free sharing benefits productivity.
• Policies promoting R&D are critical, including:
    - Patent laws
    - Investment incentives for R&D
    - Funding for university research.

Population Growth Impacts

• Three Effects on Living Standards:
    1. Stretching Resources: Historical context from Malthus indicating strain on resource provision vs. real-world trends countering this view due to technological advancements.
    2. Diluting Capital Stock: A larger population can lower physical/human capital per worker, negatively impacting productivity.
       - Fast-growing populations challenge educational resources.
    3. Promoting Technological Progress: More people generate more innovators and enhancements for economic growth, supported by evidence from Michael Kremer about population-dense regions growing faster.

Natural Resource Constraints and Technological Responses

• Concerns regarding population depleting non-renewable resources are countered by advancements in technology aiding conservation and alternative resource development (e.g., hybrid cars, home insulation improvements).

Conclusion

• Long-run living standards are fundamentally tied to productivity.
• Policies influencing productivity determinants will impact future living standards.
• Topics of upcoming discussion include the processes determining saving and investment and the policies impacting them.

Summary of Key Points

• Significant disparities exist in global living standards and growth rates.
• Productivity, defined as output per labor unit, primarily dictates long-term living standards.
• Determinants of productivity include physical/human capital, natural resources, and technological insights.
• Enhanced living standards correlate with growth in these productivity factors, particularly driven by technological advancements.