Principles of Macroeconomics: Comprehensive Final Exam Study Guide

Chapter 8: Measuring Total Production and Income (GDP)

Microeconomics vs. Macroeconomics

• Microeconomics studies individual markets and decision-makers (households, firms).

• Macroeconomics examines the economy as a whole, focusing on aggregate measures like GDP, unemployment, and inflation.

Gross Domestic Product (GDP)

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

• Components: Consumption (C), Investment (I), Government Purchases (G), Net Exports (NX).

• Formula: $Y = C + I + G + NX$

• Shortcomings: Excludes non-market transactions, underground economy, does not measure well-being or income distribution.

Nominal GDP vs. Real GDP

• Nominal GDP: Values output using current prices.

• Real GDP: Values output using constant base-year prices, adjusting for inflation.

• Calculating Nominal and Real GDP: Use price and quantity data for each year.

• Relationship: In the base year, nominal GDP = real GDP. Before base year, nominal GDP < real GDP if prices rise; after base year, nominal GDP > real GDP if prices rise.

Growth Rates

• Formula: $\text{Economic growth} = \left(\frac{\text{Real GDP}_2 - \text{Real GDP}_1}{\text{Real GDP}_1}\right) \times 100$

Chapter 9: Unemployment and Inflation

Labor Market Definitions

• Employed: People currently working for pay.

• Unemployed: Not working but actively seeking work.

• Not in Labor Force: Not working and not seeking work (e.g., retirees, students).

• Discouraged Workers: Stopped looking for work due to lack of prospects.

Key Labor Market Measures

• Labor Force: $\text{Labor force} = \text{Employed} + \text{Unemployed}$

• Unemployment Rate: $\text{Unemployment rate} = \left(\frac{\text{Unemployed}}{\text{Labor force}}\right) \times 100$

• Labor Force Participation Rate: $\text{Labor force participation rate} = \left(\frac{\text{Labor force}}{\text{Working-age population}}\right) \times 100$

• Employment-Population Ratio: $\text{Employment-population ratio} = \left(\frac{\text{Employed}}{\text{Working-age population}}\right) \times 100$

Types of Unemployment

• Frictional: Short-term, due to job search or transitions.

• Structural: Mismatch between skills and jobs; often long-term.

• Cyclical: Caused by economic downturns (recessions).

Natural Rate of Unemployment

• Also called full employment rate; includes frictional and structural unemployment, not cyclical.

Factors Affecting Unemployment

• Unemployment insurance, minimum wages, labor unions, efficiency wages, employment protection laws.

Price Level and Inflation

• Price Level: Average of current prices across the entire economy.

• Inflation Rate: $\text{Inflation rate} = \left(\frac{P_2 - P_1}{P_1}\right) \times 100$

GDP Deflator

• Definition: Measures price level of all new, domestically produced, final goods and services.

• Formula: $\text{GDP deflator} = \left(\frac{\text{Nominal GDP}}{\text{Real GDP}}\right) \times 100$

Consumer Price Index (CPI)

• Definition: Measures the average change over time in prices paid by urban consumers for a market basket of goods and services.

• Formula: $\text{CPI} = \left(\frac{\text{Expenditure in current year}}{\text{Expenditure in base year}}\right) \times 100$

• Biases: Substitution bias, quality change bias, new product bias, outlet bias.

Producer Price Index (PPI)

• Measures average changes in prices received by domestic producers for their output.

Adjusting for Inflation

• Convert past dollars to today: $\text{Amount in year X dollars} = \text{Amount in year Y dollars} \times \left(\frac{\text{Price level year X}}{\text{Price level year Y}}\right)$

• Real Variable: $\text{Real variable} = \left(\frac{\text{Nominal variable}}{\text{CPI}}\right) \times 100$

Nominal vs. Real Interest Rates

• Real interest rate: $\text{Real interest rate} = \text{Nominal interest rate} - \text{Inflation rate}$

Effects of Inflation

• Anticipated vs. unanticipated inflation, menu costs, redistribution of income and wealth.

• When actual inflation differs from expected, borrowers or lenders may benefit or lose.

Chapter 10: Economic Growth, Financial System, and Business Cycles

Long-Run Economic Growth

• Rule of 70: Estimates years to double: $\text{Number of years to double} = \frac{70}{\text{Growth rate}}$

• Determinants: Increases in labor productivity, property rights.

Labor Productivity

• Definition: Output per hour worked.

• Importance: Key driver of long-run economic growth.

• Determinants: Capital per hour worked, technological change.

Sources of Economic Growth

• Gains from trade, entrepreneurial discovery, investment.

Institutions and Policies Promoting Growth

• Legal system, competitive markets, stable money/prices, minimal regulation, low taxes, trade openness.

Potential GDP

• Level of real GDP when all firms are producing at capacity.

Financial System

• Importance: Channels funds from savers to borrowers, supporting investment and growth.

• Financial Markets: Direct finance (stocks, bonds).

• Financial Intermediaries: Indirect finance (banks, mutual funds).

• Key Services: Risk sharing, liquidity, information.

Market for Loanable Funds

• Definition: Market where savers supply funds for loans to borrowers.

• Equilibrium: Real interest rate adjusts to balance supply and demand.

• Graph: Demand (investment) downward sloping; supply (savings) upward sloping.

• Changes: Shifts affect real interest rate, investment, capital stock, and growth.

Crowding Out

• Government deficits increase interest rates, reducing private investment.

Business Cycles

• Phases: Expansion, peak, contraction (recession), trough.

• During expansion: GDP rises, unemployment falls, inflation rises.

• During contraction: GDP falls, unemployment rises, inflation falls.

Chapter 13: Aggregate Demand and Aggregate Supply Analysis

Aggregate Demand (AD)

• Downward Sloping: Due to wealth effect, interest-rate effect, international-trade effect.

• Shifters: Interest rates, government purchases, taxes, expectations, foreign income, exchange rates.

Long-Run Aggregate Supply (LRAS)

• Vertical: Output determined by resources and technology, not price level.

• Shifters: Labor force, capital stock, technology.

Short-Run Aggregate Supply (SRAS)

• Upward Sloping: Sticky wages/prices, misperceptions.

• Shifters: Labor force, capital, technology, expectations, supply shocks, disasters.

AD-AS Model

• Shows equilibrium output and price level.

• Shifts in AD or SRAS change equilibrium; adjustment process returns to LRAS in long run.

• Self-correction: Input prices and interest rates adjust, restoring full employment.

Chapter 14: Money, Banking, and the Federal Reserve System

Barter and Double Coincidence of Wants

• Barter requires both parties to want what the other offers; inefficient compared to money.

Money

• Definition: Any asset accepted as payment for goods/services or repayment of debt.

• Benefits: Facilitates exchange, more efficient than barter.

Types of Money

• Commodity, receipt, fiat, fractional reserve money.

Functions of Money

• Medium of exchange, unit of account, store of value, standard of deferred payment.

Criteria for Medium of Exchange

• Acceptable, standardized, durable, valuable, divisible.

Monetary Aggregates

• M1: Currency, checking deposits, savings deposits.

• M2: M1 plus small time deposits, money market funds.

Banking System

• Reserves: Deposits banks keep on hand.

• Fractional Reserve Banking: Banks keep a fraction of deposits as reserves.

• Money Creation: Banks lend out excess reserves, increasing money supply (illustrated with T-accounts).

• Money Multiplier: $\text{Multiplier} = \frac{\text{Money supply}}{\text{Monetary base}}$

Bank Runs and Panics

• Occur when many depositors withdraw funds simultaneously.

Federal Reserve System

• Central bank of the U.S.; regulates money supply and banks.

• Federal Deposit Insurance Corporation (FDIC) insures deposits.

• Federal Open Market Committee (FOMC): Sets monetary policy; voting members include Board of Governors and regional Fed presidents.

Monetary Policy

• Actions by the Fed to manage money supply and interest rates.

• Open market operations: Buying/selling government securities to influence reserves and rates (shown with T-accounts).

Shadow Banking System

• Non-bank financial intermediaries (e.g., investment banks, hedge funds).

Quantity Theory of Money

• Quantity Equation: $PY = MV$

• Inflation Prediction: $\text{Inflation} = \text{Growth rate of money supply} - \text{Growth rate of real output}$

Hyperinflation

• Very high inflation, often from governments printing money to finance deficits.

Chapter 15: Monetary Policy

Conduct of Monetary Policy

• Conducted by the Federal Reserve.

• Goals: Price stability, high employment, financial stability, economic growth.

Key Interest Rates

• Federal funds rate, discount rate, interest on reserve balances (IORB).

Federal Funds Market

• Market for overnight loans between banks.

• Demand curve: Downward sloping; supply curve: Vertical (scarce reserves), horizontal (ample reserves).

Monetary Policy Tools

• IORB, ON ORP (overnight reverse repurchase agreements), quantitative easing, forward guidance, open market operations, discount policy, reserve requirements.

Expansionary vs. Contractionary Policy

• Expansionary: Fed increases money supply, lowers rates, boosts AD (shown on AD-AS graph).

• Contractionary: Fed decreases money supply, raises rates, reduces AD (shown on AD-AS graph).

Countercyclical vs. Procyclical Policy

• Countercyclical: Policy moves against the business cycle to stabilize economy.

• Procyclical: Policy amplifies the business cycle.

Chapter 16: Fiscal Policy

Fiscal Policy

• Conducted by Congress and the President.

• Involves government spending and taxation to influence AD.

Federal Government Finances

• Expenditures vs. purchases, budget deficits/surpluses, national debt.

Automatic Stabilizers

• Programs that automatically increase spending or decrease taxes during downturns (e.g., unemployment insurance, progressive taxes).

Expansionary and Contractionary Fiscal Policy

• Expansionary: Increases government purchases or decreases taxes to boost AD (shown on AD-AS graph).

• Contractionary: Decreases government purchases or increases taxes to reduce AD (shown on AD-AS graph).

Multiplier Effect

• Initial change in spending leads to larger change in GDP.

• Formulas:

  • Government purchases multiplier: $\text{Multiplier} = \frac{\text{Change in real GDP}}{\text{Change in government purchases}}$

  • Transfer payments multiplier: $\text{Multiplier} = \frac{\text{Change in real GDP}}{\text{Change in transfer payments}}$

  • Tax multiplier: $\text{Multiplier} = \frac{\text{Change in real GDP}}{\text{Change in taxes}}$

Crowding-Out Effect

• Government borrowing raises interest rates, reducing private investment (short and long run; shown graphically).

Timing Difficulties

• Delays in recognizing problems, enacting, and implementing policy reduce effectiveness.

Chapter 7: Comparative Advantage and International Trade

Comparative and Absolute Advantage

• Absolute Advantage: Ability to produce more with same resources.

• Comparative Advantage: Ability to produce at lower opportunity cost.

• Gains from trade arise when countries specialize according to comparative advantage.

Specialization and Trade

• Without trade: Production = consumption.

• With trade: Countries can consume beyond their production possibilities.

Sources of Comparative Advantage

• Climate, natural resources, labor/capital abundance, technology, external economies.

Trade Policies

• Autarky (no trade), free trade, tariffs, quotas, voluntary export restraints (VER).

• Quotas are generally worse than tariffs due to lack of government revenue and potential for corruption.

• Other barriers: Health/safety standards, national security.

Economic Surplus and Trade

• Graphically illustrate surplus under autarky, with trade, with tariffs, and with quotas.

Globalization and Trade Restrictions

• Reasons for restrictions: Anti-globalization, protectionism (jobs, wages, infant industries, national security), dumping.

• Special interest groups, logrolling, concentrated benefits vs. dispersed costs, and the seen vs. unseen effects perpetuate barriers.

Key Formulas (All Chapters)

Concept	Formula (LaTeX)
Net exports	$\text{Net exports} = \text{Exports} - \text{Imports}$
GDP (Expenditure approach)	$Y = C + I + G + NX$
Economic growth rate	$\left(\frac{\text{Real GDP}_2 - \text{Real GDP}_1}{\text{Real GDP}_1}\right) \times 100$
Labor force	$\text{Employed} + \text{Unemployed}$
Unemployment rate	$\left(\frac{\text{Unemployed}}{\text{Labor force}}\right) \times 100$
Labor force participation rate	$\left(\frac{\text{Labor force}}{\text{Working-age population}}\right) \times 100$
Employment-population ratio	$\left(\frac{\text{Employed}}{\text{Working-age population}}\right) \times 100$
Inflation rate	$\left(\frac{P_2 - P_1}{P_1}\right) \times 100$
GDP deflator	$\left(\frac{\text{Nominal GDP}}{\text{Real GDP}}\right) \times 100$
CPI	$\left(\frac{\text{Expenditure in current year}}{\text{Expenditure in base year}}\right) \times 100$
Adjusting for inflation	$\text{Amount in year X dollars} = \text{Amount in year Y dollars} \times \left(\frac{\text{Price level year X}}{\text{Price level year Y}}\right)$
Real variable	$\left(\frac{\text{Nominal variable}}{\text{CPI}}\right) \times 100$
Real interest rate	$\text{Nominal interest rate} - \text{Inflation rate}$
Rule of 70	$\frac{70}{\text{Growth rate}}$
Money multiplier	$\frac{\text{Money supply}}{\text{Monetary base}}$
Quantity equation	$PY = MV$
Quantity theory of money	$\text{Inflation} = \text{Growth rate of money supply} - \text{Growth rate of real output}$
Government purchases multiplier	$\frac{\text{Change in real GDP}}{\text{Change in government purchases}}$
Transfer payments multiplier	$\frac{\text{Change in real GDP}}{\text{Change in transfer payments}}$
Tax multiplier	$\frac{\text{Change in real GDP}}{\text{Change in taxes}}$

Note: You must know these formulas for the exam; no formula sheet will be provided.