VEE Economics
Microeconomic tools
Economics questions emphasize incentives, constraints, and equilibrium. Understand demand and supply, elasticity, consumer and producer surplus, opportunity cost, marginal analysis, market structures, externalities, and public goods. Distinguish a movement along a curve from a shift of the curve. For elasticity, use the midpoint or point formula as directed and interpret absolute value for price elasticity of demand. Know that a price ceiling below equilibrium creates shortage, while a price floor above equilibrium creates surplus.
Macroeconomic links
Macro topics include GDP, inflation, unemployment, fiscal policy, monetary policy, interest rates, and exchange rates. Separate nominal from real variables. Real GDP is valued at base-year prices; nominal GDP uses current prices. Inflation redistributes between borrowers and lenders when rates are unexpected. Monetary policy affects short-term rates and liquidity, while fiscal policy affects government spending and taxation. Avoid assuming that correlation in aggregate data proves causation.
Worked rule
Suppose price rises from 10 to 12 and quantity demanded falls from 100 to 80. Using the midpoint formula, percentage change in quantity is (80-100)/90 = -22.2%, and percentage change in price is (12-10)/11 = 18.2%. Elasticity is about -1.22, so demand is elastic in that range. The trap is using the initial values and forgetting the negative sign; report magnitude when the convention asks for elasticity of demand.