Macroeconomic Theory and Market Analysis

Posted on Mar 7, 2026 in Economy

1. International Trade

Comparative Advantage

Comparative advantage explains why we purchase virtually all goods that we consume in our daily lives instead of producing them ourselves. In context, advanced countries should produce more high-tech products than they consume and export these for the relatively standard textile products that developing countries produce.

The Case for Free Trade

  • Promote efficiency
  • Promote competition
  • Practice computations later

Terms of Trade and Trade Barriers

Trade barriers include tariffs and quotas. It is essential to understand who gains and who loses from trade barriers and why.

  • Tariffs: Taxes on imported products paid at a country’s border.
    • Revenue Tariff
    • Protection Tariff
  • Gains: Producers gain from trade barriers because they earn more.
  • Losses: Consumers lose because they pay higher prices than expected.

2. The Real Goods and Services Market

Gross Domestic Product (GDP)

GDP represents the monetary market value of all final goods and services produced by the residents of a country over a given period of time. The formula is GDP = P × Q (where P can be the average price).

Approaches to GDP

  • Expenditures Approach: GDP = Consumption + Investment + Government Expenditure + Exports – Imports.
  • Income Approach: Sums the factor incomes to the factors of production.

Shortcomings of GDP as a Measure of Well-being

  • Does not include financial transactions.
  • Excludes leisure time.
  • Excludes informal economic transactions (e.g., the black market or paying a babysitter in cash).
  • Does not account for quality improvements in goods (e.g., phones and cars).
  • Does not distinguish between the production of “good” vs. “bad” products.
  • Ignores environmental considerations and income inequality.

Nominal vs. Real GDP

Real GDP = Nominal GDP / Deflator. Nominal GDP measures production at current market prices, including both price changes and growth. Real GDP measures production at constant prices to reflect pure growth.

Inflation

Inflation occurs when there is an increase in the average level of prices in an economy. It can wipe out savings and increase the cost of living.

  • Deflation: A decrease in the average level of prices; it is as dangerous as high inflation.
  • Disinflation: A decrease in the rate of inflation.
  • Target: A 2% inflation target is generally considered healthy.

The Dangers of Deflation

  • Lack of demand for goods, services, and credit.
  • Lack of credit supply by the banking system.
  • Consumers postpone purchases expecting prices to fall further, worsening recessions (e.g., Japan’s asset bubble burst).

Inflation Types

  • Demand-Pull: Caused by an increase in aggregate demand, bidding up prices.
  • Cost-Push: Caused by a decrease in aggregate supply, leading to higher prices and lower GDP.

Unemployment

  • Unemployed: Individuals with no job who are actively looking for work.
  • Labor Force: The sum of employed and unemployed persons (must be available and willing to work).
  • Unemployment Rate: Calculated as the percentage of the labor force that is unemployed and actively seeking work.

Four Types of Unemployment

  1. Frictional: Natural adjustments (e.g., students looking for their first job).
  2. Structural: Mismatch between job skills needed and those possessed by workers.
  3. Seasonal: Predictable changes in yearly cycles (e.g., ski instructors).
  4. Cyclical: Caused by slow or negative economic growth; this is the most concerning for society.

Aggregate Demand (AD) and Aggregate Supply (AS)

Aggregate Supply is the total quantity of output firms produce and sell (Real GDP). Aggregate Demand shows the relationship between the price level and total spending.

Components of AD

AD = C + I + G + NX (Consumption + Investment + Government + Net Exports).

Factors Shifting AS

  • Technology and productivity improvements (Increase AS).
  • Input prices like oil (Increase decreases AS).
  • Exchange rates and climate.
  • Natural disasters or diseases (Decrease AS).
  • New resources and immigration (Increase AS).
  • Stricter regulations (Decrease AS) vs. deregulation (Increase AS).
  • Business tax rates (Increase decreases AS).

Factors Shifting AD

  • Wealth: Higher asset values increase demand.
  • Debt: High consumer debt eventually leads to less spending.
  • Interest Rates: Higher rates make borrowing harder, decreasing demand.
  • Taxes: Higher taxes decrease consumption.
  • Expectations: Expected future price increases or GDP growth can increase current demand.

3. Money, Banking, and the Central Bank

Money Functions and Forms

  • Commodity Money: Items with intrinsic value (e.g., gold, cocoa beans, cigarettes).
  • Fiat Money: Paper or electronic money with no intrinsic value, backed by trust.
  • Functions: Medium of exchange, unit of account, and store of value.

Monetary Aggregates

  • M1: The most liquid forms, including currency in circulation and checking deposits.
  • M2: Includes M1 plus “near money” like savings accounts and time deposits.
  • Monetary Base (MB): Currency in circulation + Bank Reserves.
  • Bank Reserves: Vault cash + deposits with the Central Bank.

Commercial Banks

Banks provide financial services (loans, deposits) and help maintain economic stability. Their balance sheets are organized by liquidity.

  • Assets: Government securities, international reserves, discount loans, and reserves.
  • Liabilities: Currency in circulation, deposits (domestic, government, foreign), and stockholder equity.

Money Creation and the Multiplier

Banks create money by lending out excess reserves. The Money Multiplier (mm2) is calculated as 1 / Required Reserve Ratio. It is reduced if people hold more cash (Cc/D) or if banks hold customary reserves (U/D).

4. Monetary Policy

The purpose of monetary policy is to manage the money supply to ensure economic stability. The Central Bank is responsible for this policy.

The Four Main Tools

  1. Changing the Required Reserve Ratio: Affects the money multiplier.
  2. Changing the Discount Rate: The interest rate charged to commercial banks.
  3. Open Market Operations (OMO): Buying or selling government securities.
  4. Foreign Exchange Intervention: Buying or selling foreign currency.

5. The Credit Market

The credit market involves real loanable funds. The Nominal Interest Rate is the reported rate, while the Real Interest Rate reflects actual purchasing power.

  • Supply of Credit: Influenced by household savings, government surpluses, foreign capital inflows, and money supply.
  • Demand for Credit: Influenced by consumer, business, and government borrowing (to finance deficits).

6. Fiscal Policy

The executive branch manages fiscal policy to maximize growth, keep unemployment low, and stabilize prices.

  • Discretionary Fiscal Policy: Deliberate changes in taxes or spending (e.g., stimulus packages).
  • Non-discretionary (Automatic Stabilizers): Systems like progressive income taxes and unemployment benefits that trigger automatically.

Budget Deficits and Crowding Out

A budget deficit occurs when spending exceeds tax revenue. To finance this, the government borrows, which can lead to the crowding out effect: higher interest rates that discourage private investment.

7. The Foreign Exchange Market

The exchange rate is the price of one currency in terms of another. If USD/EUR = 1.13, then 1 Euro costs 1.13 US Dollars.

  • Nominal Exchange Rate: The rate at which currencies are traded.
  • Real Exchange Rate: The rate at which goods and services are traded between countries.
  • Systems: Flexible (market-driven) vs. Fixed (government-determined).

8. The Balance of Payments (BoP)

The BoP records all economic transactions between a country and the rest of the world. The equation is: CA + KA + NEO = FA + RRI.

Main Accounts

  1. Current Account (CA): Net exports and primary/unilateral income.
  2. Financial Account (FA): International borrowing and investments.
  3. Reserves and Related Items (RRI): Changes in international reserves.
  4. Capital Account (KA): Debt forgiveness and non-market transfers.
  5. Net Errors and Omissions (NEO): Adjustments for inaccuracies.

9. The 3 Sector Model (3SM)

The 3SM analysis helps understand the impact of economic shocks across three interconnected sectors: the Real Goods Market, the Foreign Exchange Market, and the Real Loanable Funds Market.

The Analysis Process

  1. Describe the initial setting of the three markets.
  2. Identify the economic shock.
  3. Analyze the chain reaction. If the shock is external, start with the Foreign Exchange Market.

Note: High vs. low capital mobility significantly impacts the value of a nation’s currency during these shifts.