Unit 1-6 AP Macroeconomics Practice and Global Economics Review Notes

Unit 1: Economic Basics

  • Practice Intent: These sessions transition through major concepts and basics. This material serves as a structured review but should not replace comprehensive study of the entire curriculum.

  • Absolute and Comparative Advantage Analysis:   - The Louise and Louis Comparison (Input Problem): This problem evaluates production based on the number of hours it takes to produce one unit (Pizza or Computer).     - Input Problem Identification: Problems that specify time, land, labor, or resources required to make a product are "Input Problems." Success is defined by using the fewest resources (lowest number).     - Absolute Advantage: Identified by the individual who can produce the good using the fewest resources/shortest time.     - Comparative Advantage: Identified by the individual with the lowest opportunity cost for that specific good.     - Opportunity Cost Calculation for Input: $\text{Opportunity Cost of Good A} = \frac{\text{Input of Good A}}{\text{Input of Good B}}$.   - The Mike and Mary Comparison (Output Problem): This problem assesses the amount of bicycles or bouquets each can produce with the same fixed set of resources.     - Output Problem Identification: Problems specifying the amount of goods produced are "Output Problems." Success is defined by producing the highest number.     - Absolute Advantage: Held by the person who can produce a higher absolute quantity of the good.     - Opportunity Cost Calculation for Output: $\text{Opportunity Cost of Good A} = \frac{\text{Output of Good B}}{\text{Output of Good A}}$.   - Equitable Terms of Trade: For trade to be beneficial for both parties, the exchange rate (Terms of Trade) must lie between the two producers' opportunity costs. For the Louise and Louis example, terms are expressed as: 1 computer for X  pizza1 \text{ computer for } \text{X } \text{ pizza}.

  • Production Possibilities Curve (PPC) - Smileyland:   - Graph Axis Labels: The Y-axis represents Capital Goods; the X-axis represents Consumer Goods.   - Point A (Full Efficiency): Located anywhere along the frontier curve representing maximum output with current resources.   - Point B (Impossible): Located outside the frontier curve; unattainable with current technology and resources.   - Point C (Inefficient/Unemployment): Located inside the frontier curve; indicates resources are being underutilized or idle (unemployment).

  • PPC Growth Determinants: Factors that shift the PPC outward include an increase in the quantity or quality of resources, improvements in technology, or gains from international trade.

Unit 2: Indicators

  • Core Macroeconomic Measures:   - GDP (Gross Domestic Product): The total market value of all final goods and services produced within a country's borders in a specific time period.   - Unemployment: Occurs when people are without work, available for work, and have actively looked for work in the past four seasons.   - Inflation: A general increase in prices and a fall in the purchasing value of money.

  • GDP Calculations and Approaches:   - Nominal GDP: Current production at current prices.   - Real GDP: Current production at constant (base-year) prices. It is adjusted for inflation.   - Real GDP per capita formula: Real GDP per capita=Real GDPPopulation\text{Real GDP per capita} = \frac{\text{Real GDP}}{\text{Population}}.   - National Income Approach: Wages+Rent+Interest+Profit+TIP (Taxes on Imports and Production)\text{Wages} + \text{Rent} + \text{Interest} + \text{Profit} + \text{TIP (Taxes on Imports and Production)}.   - Expenditure Approach: C+I+G+(X−M)C + I + G + (X - M), where C is Consumption, I is Investment, G is Government Spending, and (X-M) is Net Exports (Exports minus Imports).

  • Price Indices and Inflation Formulas:   - GDP Deflator Equation: GDP Deflator=(Nominal GDPReal GDP)×100\text{GDP Deflator} = \left(\frac{\text{Nominal GDP}}{\text{Real GDP}}\right) \times 100.   - Price of Market Basket: (Quantity in current year×Price in base year)(\text{Quantity in current year} \times \text{Price in base year}).   - Consumer Price Index (CPI): CPI=Cost of basket in current yearCost of basket in base year×100\text{CPI} = \frac{\text{Cost of basket in current year}}{\text{Cost of basket in base year}} \times 100.   - Inflation Rate Percentage Change: Inflation Rate=[CPI<em>new−CPI</em>oldCPIold]×100\text{Inflation Rate} = \left[\frac{\text{CPI}<em>\text{new} - \text{CPI}</em>\text{old}}{\text{CPI}_\text{old}}\right] \times 100.

  • The Labor Market:   - Labor Force: Employed+Unemployed\text{Employed} + \text{Unemployed}.   - Types of Unemployment:     1. Frictional: Transitioning between jobs or entering the workforce.     2. Structural: Skills no longer match available jobs; replaced by technology/globalization.     3. Cyclical: Caused by the recessionary phase of the business cycle.   - Natural Rate of Unemployment (NRU): Frictional+Structural=4-6%\text{Frictional} + \text{Structural} = 4\text{-}6\%. It contains no cyclical unemployment.   - Unemployment Rate: UnemployedLabor Force×100%\frac{\text{Unemployed}}{\text{Labor Force}} \times 100\%.   - Labor Force Participation Rate: Labor ForceTotal Adult Population×100%\frac{\text{Labor Force}}{\text{Total Adult Population}} \times 100\%.

  • Monetary Theory:   - Quantity Theory of Money Equation: M×V=P×YM \times V = P \times Y, where M is Money Supply, V is Velocity, P is Price Level, and Y is Real GDP.   - Demand-Pull Inflation: Caused by consumers "pulling" up prices through excessive spending (Too much money chasing too few goods).   - Cost-Push Inflation: Caused by an increase in production costs (like oil prices) that "push" up the price level.

  • Quantitative Practice:   - Scenario 1: Nominal GDP = $100 million, Real GDP = $80 billion. Formula: 100,000,00080,000,000,000×100=0.125\frac{100,000,000}{80,000,000,000} \times 100 = 0.125.   - Scenario 2: Basket 2001 (Base) = $10,000; Basket 2002 = $12,000.     - CPI 2002: (12,00010,000)×100=120\left(\frac{12,000}{10,000}\right) \times 100 = 120.     - Inflation Rate: [120−100100]×100=20%\left[\frac{120 - 100}{100}\right] \times 100 = 20\%.

Unit 3: AD/AS & Fiscal Policy

  • Equilibrium Models:   - Full Employment Equilibrium: AD and SRAS intersect at the LRPC/LRAS line.   - Positive Output Gap (Inflationary Gap): SRAS/AD intersection is to the right of the LRAS curve.   - Negative Output Gap (Recessionary Gap): SRAS/AD intersection is to the left of the LRAS curve.

  • Propensities and Multipliers:   - MPC (Marginal Propensity to Consume): The change in consumption resulting from a change in income.   - MPS (Marginal Propensity to Save): The change in saving resulting from a change in income.   - Identity: 1=MPC+MPS1 = \text{MPC} + \text{MPS}. This is because every dollar of disposable income must be either consumed or saved.   - Spending Multiplier: 1MPS\frac{1}{\text{MPS}} or 11−MPC\frac{1}{1 - \text{MPC}}.   - Simple Tax/Transfer Payment Multiplier: −MPCMPS\frac{-\text{MPC}}{\text{MPS}}.

  • Fiscal Policy Summary Table:   - Expansionary Fiscal Policy: Used for a Recessionary (Negative) gap. Involves Increasing government spending, Decreasing taxes, or Increasing transfer payments.   - Contractionary Fiscal Policy: Used for an Inflationary (Positive) gap. Involves Decreasing government spending, Increasing taxes, or Decreasing transfer payments.

  • Gap Closing Example:   - Problem: Negative output gap = $40 billion. Full employment output = $100 billion. MPC = 0.75.   - Calculations:     - MPS = 1−0.75=0.251 - 0.75 = 0.25.     - Spending Multiplier = 10.25=4\frac{1}{0.25} = 4.     - Change in Spending needed: $40 billion4=$10 billion\frac{\$40\text{ billion}}{4} = \$10\text{ billion} increase.     - Tax Multiplier = −0.750.25=−3\frac{-0.75}{0.25} = -3.     - Change in Taxes needed: $40 billion−3=−$13.33 billion\frac{\$40\text{ billion}}{-3} = -\$13.33\text{ billion} (decrease).   - Self-Correction: In the long run, if the government does nothing, nominal wages and resource prices will eventually fall (in a recession), shifting SRAS to the right until full employment is restored.

Unit 4: Financial Markets & The Fed

  • Money Supply Categories:   - Monetary Base: Currency in circulation + Bank reserves.   - M1: Currency + demand deposits + traveler's checks.   - M2: All of M1 + savings deposits + time deposits (CDs) + money market funds.

  • Monetary Policy Scenarios:   - Scenario A: Limited Reserves Banking System (Recession):     - Required Reserve Rate (RRR): 0.2     - Tools: Buy bonds (Open Market Operations), Decrease RRR, or Decrease the Discount Rate.     - Effect: Increases money supply, shifts Money Supply curve right, decreasing the nominal interest rate.   - Scenario B: Ample Reserves Banking System (Expansion):     - Required Reserve Rate (RRR): 0     - Tools: The Primary tool is IOR (Interest on Reserves). To fix an inflationary gap, the Fed Increases the policy rate (Administered rates like IOR).     - Effect: Increases the cost of lending, raising the target federal funds rate.

  • Loanable Funds Market:   - Scenario: Increase in private savings.   - Effect: Supply of loanable funds shifts right. This results in a decrease in the real interest rate.

Unit 5: Long-Run Consequences of Stabilization Policies

  • Phillips Curve Model:   - Points on the SRPC:     1. Recessionary Gap: Low inflation, high unemployment (far right on SRPC).     2. Inflationary Gap: High inflation, low unemployment (far left on SRPC).     3. Full Employment: The intersection of SRPC and LRPC.

  • Policy Impacts:   - Increasing government spending (Expansionary) shifts the economy up along the SRPC (higher inflation, lower unemployment).   - Self-adjustment (no intervention) shifts the SRPC itself as inflation expectations change.

  • Crowding Out:   - Definition: Occurs when expansionary fiscal policy (deficit spending) leads to higher interest rates, which reduces (crowds out) private investment.   - Model: Demand for loanable funds shifts right, increasing the real interest rate.

  • Economic Growth:   - Components: Human capital, physical capital, technology, and natural resources.   - Capital Stock Investment: An increase in capital stock shifts AD right in the short run and shifts both LRAS and the PPC outward in the long run.

Unit 6: FOREX

  • Balance of Payments:   - Current Account (CA): Records net exports (goods/services), net investment income, and net transfers.   - Capital Financial Account (CFA): Records the purchase and sale of assets (foreign direct investment, stocks, bonds).   - Equation: CA+CFA=0CA + CFA = 0.

  • Foreign Exchange (FOREX) Determinants:   1. Changes in Consumer Tastes/Preferences.   2. Relative Income Levels.   3. Relative Price Levels (Inflation).   4. Relative Real Interest Rates.   5. Speculation.

  • Real Interest Rate Increase in the U.S.:   - FOREX Impact: Japanese Yen (\u00a5) holders demand more U.S. Dollars ($) to earn higher returns. Demand for $ shifts right; Supply of \u00a5 shifts right.   - Result: The U.S. Dollar appreciates; the Japanese Yen depreciates.   - Trade Impact: The stronger dollar makes American goods more expensive for foreigners and foreign goods cheaper for Americans. Exports decrease and Imports increase, leading to a decrease in Net Exports ($X_n$).