ECON209 Exam 1 Review – Guided Study for Macroeconomics Concepts

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Q1. What is opportunity cost? How is it calculated?

Background

Topic: Opportunity Cost

This question tests your understanding of the concept of opportunity cost, which is fundamental in economics for making rational choices when resources are scarce.

Key Terms and Formulas:

Opportunity Cost: The value of the next best alternative forgone when a choice is made.
Calculation: Opportunity cost is typically calculated as the benefit you would have received from the next best alternative.

Step-by-Step Guidance

Identify the decision or choice being made (e.g., choosing between two activities or goods).
List the alternatives available and rank them by preference or value.
Determine what is given up when the top choice is selected (the next best alternative).
Express the opportunity cost as the value of the next best alternative forgone.

Try solving on your own before revealing the answer!

Q2. What is human capital? How has it evolved in the U.S.? Why?

Background

Topic: Human Capital

This question examines your understanding of human capital and its development in the U.S. economy.

Key Terms:

Human Capital: The skills, knowledge, and experience possessed by individuals, viewed in terms of their value to an organization or economy.

Step-by-Step Guidance

Define human capital in your own words.
Consider historical trends in education, training, and workforce skills in the U.S.
Think about technological changes, policy shifts, and economic needs that have influenced human capital development.
Explain why these changes have occurred (e.g., demand for higher skills, globalization).

Try answering before checking the explanation!

Q3. What does the PPF illustrate?

Background

Topic: Production Possibilities Frontier (PPF)

This question tests your understanding of the PPF and what it represents in economics.

Key Terms:

PPF (Production Possibilities Frontier): A curve showing the maximum attainable combinations of two goods that can be produced with available resources and technology.

Step-by-Step Guidance

Recall what the axes of the PPF represent (quantities of two different goods).
Think about what points on, inside, and outside the PPF mean (efficiency, inefficiency, unattainability).
Consider what the shape of the PPF tells you about opportunity cost (usually increasing).

Try explaining the PPF before checking the answer!

Q4. What is MC? MB? What laws do they follow? Why?

Background

Topic: Marginal Analysis

This question is about marginal cost (MC), marginal benefit (MB), and the economic laws they follow.

Key Terms and Formulas:

Marginal Cost (MC): The additional cost of producing one more unit of a good.
Marginal Benefit (MB): The additional benefit received from consuming one more unit of a good.
Law of Increasing Marginal Cost: As production increases, the marginal cost of producing additional units typically rises.
Law of Diminishing Marginal Benefit: As more of a good is consumed, the additional benefit from each extra unit typically decreases.

Step-by-Step Guidance

Define MC and MB clearly.
State the law each follows (increasing MC, diminishing MB).
Explain why these laws hold (resource constraints, satiation).

Try to define and explain before checking the answer!

Q5. How is productive efficiency different from allocative efficiency?

Background

Topic: Efficiency in Economics

This question tests your understanding of two types of efficiency: productive and allocative.

Key Terms:

Productive Efficiency: Producing goods at the lowest possible cost (on the PPF).
Allocative Efficiency: Producing the mix of goods most desired by society (where MB = MC).

Step-by-Step Guidance

Define each type of efficiency.
Identify where each occurs on the PPF.
Explain how they differ in terms of resource allocation and societal preferences.

Try to distinguish the two before checking the answer!

Q6. How is economic growth achieved in the PPF model? How is it illustrated?

Background

Topic: Economic Growth and the PPF

This question is about how economic growth is represented in the PPF model.

Key Terms:

Economic Growth: An increase in the capacity to produce goods and services.
PPF Shift: Outward movement of the PPF curve.

Step-by-Step Guidance

Recall what causes economic growth (e.g., more resources, better technology).
Describe how the PPF shifts when growth occurs.
Explain what this shift means for the economy's production possibilities.

Try to illustrate the shift before checking the answer!

Q7. Why is trade mutually beneficial to participants?

Background

Topic: Gains from Trade

This question tests your understanding of why voluntary trade benefits all parties involved.

Key Terms:

Mutual Benefit: Both parties can obtain goods at a lower opportunity cost than if they produced them themselves.
Comparative Advantage: The ability to produce a good at a lower opportunity cost than another producer.

Step-by-Step Guidance

Recall the concept of comparative advantage.
Explain how trade allows each participant to specialize and consume beyond their own PPF.
Describe how both sides can be better off after trade.

Try to explain the mutual benefit before checking the answer!

Q8. How are gains from trade captured in the supply-demand model?

Background

Topic: Supply and Demand, Gains from Trade

This question is about how the benefits of trade are shown in the supply and demand framework.

Key Terms:

Consumer Surplus: The difference between what consumers are willing to pay and what they actually pay.
Producer Surplus: The difference between what producers receive and the minimum they would accept.

Step-by-Step Guidance

Identify the equilibrium price and quantity in the supply-demand model.
Explain how consumer and producer surplus represent gains from trade.
Describe how the area between the demand and supply curves up to equilibrium shows total gains from trade.

Try to identify the surpluses before checking the answer!

Q9. How is absolute advantage different from comparative advantage?

Background

Topic: Trade Theory

This question tests your understanding of two key concepts in international trade.

Key Terms:

Absolute Advantage: The ability to produce more of a good with the same resources than another producer.
Comparative Advantage: The ability to produce a good at a lower opportunity cost than another producer.

Step-by-Step Guidance

Define both absolute and comparative advantage.
Explain how opportunity cost is central to comparative advantage.
Give an example or scenario to illustrate the difference.

Try to distinguish the two before checking the answer!

Q10. What forms the basis for trade?

Background

Topic: Basis for Trade

This question is about why trade occurs between individuals or nations.

Key Terms:

Comparative Advantage: The main reason trade occurs.
Differences in Opportunity Cost: Lead to specialization and trade.

Step-by-Step Guidance

Recall that trade is based on differences in opportunity costs.
Explain how specialization according to comparative advantage leads to gains from trade.
Describe how both parties can benefit from exchanging goods or services.

Try to explain the basis before checking the answer!

Q11. What are the influences on demand?

Background

Topic: Determinants of Demand

This question tests your knowledge of the factors that shift the demand curve.

Key Terms:

Determinants of Demand: Factors other than price that affect demand.

Step-by-Step Guidance

List the main influences: income, prices of related goods, tastes, expectations, number of buyers.
Explain how each factor can increase or decrease demand.
Distinguish between a movement along the curve (price change) and a shift of the curve (other factors).

Try to list and explain the influences before checking the answer!

Q12. What are the influences on supply?

Background

Topic: Determinants of Supply

This question tests your knowledge of the factors that shift the supply curve.

Key Terms:

Determinants of Supply: Factors other than price that affect supply.

Step-by-Step Guidance

List the main influences: input prices, technology, expectations, number of sellers, government policies.
Explain how each factor can increase or decrease supply.
Distinguish between a movement along the curve (price change) and a shift of the curve (other factors).

Try to list and explain the influences before checking the answer!

Q13. How is a change in quantity demanded/supplied different from a change in demand/supply?

Background

Topic: Movements vs. Shifts in Supply and Demand

This question tests your understanding of the difference between movements along a curve and shifts of the curve.

Key Terms:

Change in Quantity Demanded/Supplied: Movement along the curve due to a price change.
Change in Demand/Supply: Shift of the entire curve due to other factors.

Step-by-Step Guidance

Define each term clearly.
Explain what causes a movement along the curve (price change).
Explain what causes a shift of the curve (other determinants).

Try to explain the difference before checking the answer!

Q14. What is a shortage in the supply-demand model? A surplus? How is the new equilibrium achieved?

Background

Topic: Market Equilibrium

This question is about disequilibrium in markets and how equilibrium is restored.

Key Terms:

Shortage: Quantity demanded exceeds quantity supplied at a given price.
Surplus: Quantity supplied exceeds quantity demanded at a given price.
Equilibrium: Where quantity demanded equals quantity supplied.

Step-by-Step Guidance

Define shortage and surplus in the context of the supply-demand model.
Explain what happens to price when there is a shortage or surplus.
Describe the process by which the market returns to equilibrium.

Try to explain the adjustment process before checking the answer!

Q15. What is GDP?

Background

Topic: Gross Domestic Product (GDP)

This question tests your understanding of what GDP measures in macroeconomics.

Key Terms:

GDP: The market value of all final goods and services produced within a country in a given period.

Step-by-Step Guidance

Recall the definition of GDP.
Identify what is included (final goods, services, within borders, during a specific time).
Explain why GDP is an important measure of economic activity.

Try to define GDP before checking the answer!

Q16. What are the three approaches to measuring GDP?

Background

Topic: Measuring GDP

This question is about the different methods used to calculate GDP.

Key Terms:

Expenditure Approach: Adds up all spending on final goods and services.
Income Approach: Adds up all incomes earned in the production of goods and services.
Production (Value-Added) Approach: Adds up the value added at each stage of production.

Step-by-Step Guidance

List the three approaches.
Briefly describe how each approach works.
Explain why all three should, in theory, yield the same GDP value.

Try to describe each approach before checking the answer!

Q17. What is the income-expenditure identity?

Background

Topic: National Income Accounting

This question is about the fundamental relationship between income and expenditure in an economy.

Key Formula:

Where:

= National income (GDP)
= Consumption
= Investment
= Government spending
= Exports
= Imports

Step-by-Step Guidance

Recall the formula for the income-expenditure identity.
Identify each component and what it represents.
Explain why total income equals total expenditure in the economy.

Try to write out and explain the identity before checking the answer!

Q18. What are the incomes to factors of production?

Background

Topic: Factor Incomes

This question is about the types of income earned by the factors of production.

Key Terms:

Land: Earns rent.
Labor: Earns wages.
Capital: Earns interest.
Entrepreneurship: Earns profit.

Step-by-Step Guidance

List the four factors of production.
Identify the type of income each factor earns.
Explain why each factor receives its respective income.

Try to match the incomes before checking the answer!

Q19. Why is the U.S. economy said to be based on private consumption?

Background

Topic: Structure of the U.S. Economy

This question is about the composition of GDP in the U.S. and the role of consumption.

Key Terms:

Private Consumption: Spending by households on goods and services.

Step-by-Step Guidance

Recall the components of GDP (C, I, G, X-M).
Identify which component is the largest in the U.S.
Explain why private consumption dominates U.S. GDP.

Try to explain the dominance of consumption before checking the answer!

Q20. How is real GDP different from nominal GDP?

Background

Topic: Real vs. Nominal GDP

This question tests your understanding of the difference between real and nominal GDP.

Key Terms and Formulas:

Nominal GDP: Measured using current prices.
Real GDP: Measured using constant base-year prices.
Formula:

Step-by-Step Guidance

Define nominal and real GDP.
Explain why real GDP is adjusted for inflation.
Describe how to convert nominal GDP to real GDP using the GDP deflator.

Try to explain the difference before checking the answer!

Q21. What is potential GDP? What decade defines it?

Background

Topic: Potential GDP

This question is about the concept of potential GDP and its historical benchmark.

Key Terms:

Potential GDP: The level of GDP attained when all resources are fully employed.

Step-by-Step Guidance

Define potential GDP.
Explain how it differs from actual GDP.
Identify the decade commonly used as a benchmark for potential GDP (often the 1970s or 1980s in U.S. data).

Try to recall the benchmark decade before checking the answer!

Q22. What are some important omissions from GDP?

Background

Topic: Limitations of GDP

This question is about what GDP does not measure.

Key Terms:

Omissions: Non-market activities, underground economy, environmental quality, leisure, etc.

Step-by-Step Guidance

List activities not included in GDP (e.g., household production, illegal transactions).
Explain why these omissions matter for measuring economic well-being.
Discuss the implications for comparing GDP across countries or over time.

Try to list omissions before checking the answer!

Q23. What is the Lucas Wedge?

Background

Topic: Economic Growth and Welfare

This question is about the Lucas Wedge, a concept in growth economics.

Key Terms:

Lucas Wedge: The cumulative loss to GDP from actual GDP growing more slowly than potential GDP.

Step-by-Step Guidance

Define the Lucas Wedge.
Explain how it is calculated (difference between potential and actual GDP over time).
Discuss why it matters for long-term economic welfare.

Try to define and explain before checking the answer!

Q24. What is the current state of the U.S. economy? Is inflation the main culprit? Is unemployment a problem?

Background

Topic: Current Macroeconomic Conditions

This question asks you to analyze the present state of the U.S. economy, focusing on inflation and unemployment.

Key Terms:

Inflation: Sustained increase in the general price level.
Unemployment: The share of the labor force without jobs but actively seeking work.

Step-by-Step Guidance

Research recent data on U.S. inflation and unemployment rates.
Identify whether inflation or unemployment is currently a bigger concern.
Explain the causes and implications of these trends for the economy.