Skill 4 appears only on the free-response section. You are asked to draw a correctly labeled economic model, place a specific situation on it, and show how a change shifts curves and moves the equilibrium. Every scoring point on a graph part is tied to a specific element: axis labels, curve labels, initial equilibrium, shift direction, and new equilibrium. Missing any one of these loses that point even if the rest of the graph is correct.
- Draw and label: Produce a graph with correctly named axes, correctly labeled curves, and a clearly marked equilibrium point.
- Show a shift: Draw the new curve position after a change, label it distinctly from the original, and mark the new equilibrium.
- Subskill 4.A: Draw a correctly labeled graph of an economic model.
- Subskill 4.B: Place a specific economic situation on a graph.
- Subskill 4.C: Show how a change in an economic situation shifts curves and changes the equilibrium outcome.
Draw the AD-AS model showing an economy in a recessionary gap, then show the effect of expansionary monetary policy. Label every axis, every curve, both equilibria, and the direction of the AD shift.
| Graph required | Key labels needed | Common point lost |
|---|
| AD-AS (short run) | Price Level, Real GDP, AD, SRAS, LRAS, equilibrium point | Forgetting to label the new equilibrium after a shift |
| Money market | Nominal interest rate, Quantity of money, MS, MD, equilibrium | Drawing a shift in the wrong curve |
| Loanable funds | Real interest rate, Quantity of loanable funds, S, D, equilibrium | Confusing nominal and real interest rate on the axis label |
| Foreign exchange | Exchange rate (price of domestic currency), Quantity of currency, S, D | Labeling the axis as 'price' without specifying the currency pair |