This is a classic set of questions from open economy macroeconomics, focusing on the Mundell-Fleming model (IS-LM-BP framework). Below are detailed step-by-step answers for each part, with explanations, diagrams, and discussion of both output and price effects in the short and long run. **Note:** While I cannot draw diagrams directly, I will describe them in detail so you can sketch them. --- ## Key Concepts - **IS Curve:** Goods market equilibrium (Y, r) - **LM Curve:** Money market equilibrium (Y, r) - **BP Curve:** Balance of payments equilibrium (Y, r) - **Fixed Exchange Rate:** Central bank keeps exchange rate constant, adjusting money supply as needed. - **Floating Exchange Rate:** Exchange rate determined by market; central bank does not intervene. - **Short Run:** Prices are sticky. - **Long Run:** Prices are flexible. --- # a) Expansionary Fiscal Policy – Fixed Exchange Rate ### Short Run **Mechanism:** - Government increases spending or cuts taxes → IS curve shifts right. - Output (Y) increases, interest rate (r) rises. - Higher r attracts capital inflow; upward pressure on currency. - Central bank intervenes to maintain exchange rate: **buys foreign currency, increases money supply** → LM shifts right to restore r. **Diagram:** - **IS-LM diagram (Y on X, r on Y):** IS shifts right, LM also shifts right. - **Result:** Y increases, r returns to original level. **Output:** Increases. **Prices:** No immediate change (sticky). **BP equilibrium:** Maintained by central bank intervention. ### Long Run - Higher Y increases demand; prices start to rise. - Higher prices shift LM left (as real money supply falls). - Output falls back towards potential (Y*). **Diagram:** - LM shifts left as prices rise, output returns to original level. **Output:** Returns to potential. **Prices:** Higher than initial level. --- # b) Expansionary Fiscal Policy – Floating Exchange Rate ### Short Run **Mechanism:** - Fiscal expansion → IS shifts right. - Y and r rise. - Higher r attracts capital inflow → currency appreciates. - Appreciation **reduces net exports**, offsets fiscal expansion. **Diagram:** - IS shifts right, but net exports fall due to appreciation → IS shifts partially back. - LM does not move. **Output:** Small or negligible increase. **Prices:** Little change. ### Long Run - Any small increase in Y raises prices, LM shifts left, output returns to Y*. - Exchange rate remains appreciated. **Output:** Returns to potential. **Prices:** Slightly higher, but effect is small. --- # c) Contractionary Fiscal Policy – Fixed Exchange Rate ### Short Run **Mechanism:** - Government cuts spending or raises taxes → IS shifts left. - Y falls, r falls. - Lower r → capital outflow, downward pressure on currency. - Central bank sells foreign reserves, **reduces money supply** → LM shifts left. **Diagram:** - IS shifts left, LM also shifts left to maintain r. **Output:** Falls. **Prices:** No immediate change. ### Long Run - Lower Y reduces demand, prices fall. - LM shifts right (as real money balances rise). - Output returns to Y*. **Output:** Returns to potential. **Prices:** Lower than initial level. --- # d) Contractionary Fiscal Policy – Floating Exchange Rate ### Short Run **Mechanism:** - IS shifts left, Y and r fall. - Lower r → capital outflow, currency depreciates. - Depreciation **boosts net exports**, offsets contraction. **Diagram:** - IS shifts left, but net exports rise → IS shifts partially back. - LM unchanged. **Output:** Small or negligible fall. **Prices:** Little change. ### Long Run - Output returns to Y* as prices adjust. - Currency remains depreciated, prices slightly lower. --- # e) Expansionary Monetary Policy – Fixed Exchange Rate ### Short Run **Mechanism:** - Central bank increases money supply → LM shifts right. - r falls, capital outflow, currency depreciates. - Central bank **must intervene**, selling foreign reserves to maintain exchange rate, **undoes monetary expansion**. **Diagram:** - LM shifts right, but returns to original position. **Output:** No change. **Prices:** No change. ### Long Run - No effect; monetary policy is **ineffective** under fixed exchange rate. --- # f) Expansionary Monetary Policy – Floating Exchange Rate ### Short Run **Mechanism:** - LM shifts right, r falls. - Capital outflow, currency depreciates. - Depreciation boosts net exports, IS shifts right, Y rises. **Diagram:** - LM shifts right, IS shifts right due to net exports. **Output:** Rises. **Prices:** No immediate change. ### Long Run - Higher Y increases prices, LM shifts left, output returns to Y*. - Currency remains depreciated, prices higher. --- # g) Contractionary Monetary Policy – Fixed Exchange Rate ### Short Run **Mechanism:** - Central bank reduces money supply → LM shifts left. - r rises, capital inflow, currency appreciates. - Central bank **must intervene**, buying foreign reserves, increasing money supply to maintain fix, **undoes contraction**. **Diagram:** - LM shifts left, but returns to original. **Output:** No change. **Prices:** No change. ### Long Run - No effect; monetary policy is **ineffective** under fixed exchange rate. --- # h) Contractionary Monetary Policy – Floating Exchange Rate ### Short Run **Mechanism:** - LM shifts left, r rises. - Capital inflow, currency appreciates. - Appreciation reduces net exports, IS shifts left, Y falls. **Diagram:** - LM shifts left, IS shifts left due to net exports. **Output:** Falls. **Prices:** No immediate change. ### Long Run - Lower Y reduces prices, LM shifts right, output returns to Y*. - Currency remains appreciated, prices lower. --- ## Summary Table | Policy | Exchange Rate | Short Run Y | Short Run P | Long Run Y | Long Run P | |--------|--------------|-------------|-------------|------------|------------| | Exp. Fiscal | Fixed | ↑ | – | → | ↑ | | Exp. Fiscal | Floating | → | – | → | ↑ | | Contr. Fiscal | Fixed | ↓ | – | → | ↓ | | Contr. Fiscal | Floating | → | – | → | ↓ | | Exp. Monetary | Fixed | – | – | – | – | | Exp. Monetary | Floating | ↑ | – | → | ↑ | | Contr. Monetary | Fixed | – | – | – | – | | Contr. Monetary | Floating | ↓ | – | → | ↓ | --- ## Diagram Description For each scenario, **draw three panels:** 1. **IS-LM diagram:** - IS = goods market (downward sloping, Y vs r) - LM = money market (upward sloping, Y vs r) - BP = balance of payments (usually horizontal at world r in perfect capital mobility) 2. **Shift curves as explained above.** 3. **Mark initial equilibrium (E₀), new short-run equilibrium (E₁), and long-run equilibrium (E₂).** 4. **For fixed exchange rate:** Show LM shifting as central bank intervenes. 5. **For floating exchange rate:** Show IS shifting due to net export effects. --- ## Additional Notes - **Fixed Exchange Rate:** Fiscal policy is effective, monetary policy is not. - **Floating Exchange Rate:** Monetary policy is effective, fiscal policy is weak. - **Short Run:** Output can deviate from potential. - **Long Run:** Output returns to potential, prices adjust. --- ## Example Diagram (IS-LM-BP, Expansionary Fiscal, Fixed Rate, Short Run) 1. Draw Y (horizontal), r (vertical). 2. IS₀, LM₀, BP (flat at world r). 3. IS₁ (to right), LM shifts right to keep r at world level. 4. Show movement from E₀ to E₁ (higher Y, same r). --- **If you need actual hand-drawn diagrams or further details for each case, please specify the scenario!**