This topic covers the basic concepts of macroeconomics, such as the principles of supply and demand, market equilibrium, and the role of government in the economy.
Introduction to Macroeconomics – Study Guide
| Aspect | Description |
|---|---|
| Scope | Examines the performance, structure, and behavior of an economy as a whole (national or global). |
| Key Questions | • How large is output? • How much does the price level change? • How many people are employed? • What determines the level of savings and investment? |
| Contrast with Microeconomics | Micro: decisions of individual households/firms; Macro: aggregate outcomes (GDP, inflation, unemployment, fiscal/monetary policy). |
| Variable | Symbol | What It Measures | Typical Data Source |
|---|---|---|---|
| Gross Domestic Product | Y or GDP | Total market value of all final goods & services produced within a country in a given period. | National accounts (e.g., BEA, Eurostat) |
| Price Level | P | Average price of a basket of goods & services; often measured by CPI or PPI. | Consumer Price Index (CPI), Producer Price Index (PPI) |
| Unemployment Rate | U | Share of the labor force that is job‑less but actively seeking work. | Labor force surveys |
| Interest Rate | i | Cost of borrowing; the policy rate set by the central bank influences other rates. | Central bank publications |
| Exchange Rate | e | Value of the domestic currency relative to foreign currencies. | Foreign exchange markets |
| Government Deficit/Surplus | G – T | Difference between government spending (G) and tax revenue (T). | Treasury/Finance ministry reports |
| Model | Purpose | Key Equation(s) |
|---|---|---|
| Aggregate Demand–Aggregate Supply (AD‑AS) | Shows short‑run equilibrium of output & price level. | AD: ( Y = C(Y‑T) + I(i) + G + NX(e) ) AS: ( Y = \bar{Y}(P) ) (short‑run) |
| IS‑LM | Captures interaction of goods market (IS) and money market (LM). | IS: ( Y = C(Y‑T) + I(r) + G ) LM: ( M/P = L(Y, r) ) |
| Solow Growth Model | Explains long‑run economic growth via capital accumulation, labor, and technology. | ( \Delta k = s f(k) - (n + \delta)k ) |
| Phillips Curve | Relationship between inflation and unemployment. | Short‑run: ( \pi_t = \pi_{t-1} - \beta (U_t - U^*) + v_t ) |
| Mundell‑Fleming (Open Economy) | Extends IS‑LM to include exchange rates & capital mobility. | IS: ( Y = C + I + G + NX(e) ) LM: ( M/P = L(i, Y) ) BP: ( B = 0 ) (balance of payments) |
| Concept | Formula | Remarks |
|---|---|---|
| Nominal GDP | ( \displaystyle \sum_{i} P_i Q_i ) | Measured in current prices. |
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