1. Lectures in Macroeconomics- Charles W. Upton How Exchange Rates Change

2. 2 The Process Comparative Advantage & Supply and Demand set relative prices of goods Domestic Prices are set via the Quantity Theory The Combination Sets Exchange Rates

3. How Exchange Rates Change 3 Determining Exchange Rates Domestic monetary policies in the US mean that CDs cost $15 each. (T-shirts = $5) Domestic monetary policy in Mexico means that T-shirts cost 50 Pesos. (CDs = 150P) p TS = 3 p CD $1=10 Pesos

4. How Exchange Rates Change 4 Determining Exchange Rates Domestic monetary policies in the US mean that CDs cost $15 each. (T-shirts = $5) Domestic monetary policy in Mexico means that T-shirts cost 50 Pesos. (CDs = 150P) p TS = 3 p CD $1=10 Pesos

5. How Exchange Rates Change 5 Determining Exchange Rates Domestic monetary policies in the US mean that CDs cost $15 each. (T-shirts = $5) Domestic monetary policy in Mexico means that T-shirts cost 50 Pesos. (CDs = 150P) p TS = 3 p CD $1=10 Pesos Changes in domestic money supplies. Changes in preferences for CDs and t-shirts

6. How Exchange Rates Change 6 The Market for Dollars and Pesos Assume a Floating Market No Intervention by either Government.

7. How Exchange Rates Change 7 Inflation The Mexican Monetary Authority Increases the supply of Pesos by 50%.

8. How Exchange Rates Change 8 Inflation The Mexican Monetary Authority Increases the supply of Pesos by 50%. Mexican Prices must rise by 50% –T-shirts at 75 Pesos –CDs at 225 Pesos

9. How Exchange Rates Change 9 Inflation The Mexican Monetary Authority Increases the supply of Pesos by 50%. Mexican Prices must rise by 50% –T-shirts at 75 Pesos –CDs at 225 Pesos The Exchange rate must go to $1 = 15 Pesos.

10. How Exchange Rates Change 10 Shift in Demand Mexicans grow tired of American CD’s and the demand curve shifts to the left.

11. How Exchange Rates Change 11 Shift in Demand Mexicans grow tired of American CD’s and the demand curve shifts to the left. p CD = 2p TS

12. How Exchange Rates Change 12 Shift in Demand Mexicans grow tired of American CD’s and the demand curve shifts to the left. p CD = 2p TS T-shirts stay at 50 Pesos; CD’s at $15.

13. How Exchange Rates Change 13 Shift in Demand Mexicans grow tired of American CD’s and the demand curve shifts to the left. p CD = 2p TS T-shirts stay at 50 Pesos; CD’s at $15. The exchange rate must be $1 = 6 ²/ ³ Pesos.

14. How Exchange Rates Change 14 Shift in Demand Mexicans grow tired of American CD’s and the demand curve shifts to the left. p CD = 2p TS T-shirts stay at 50 Pesos; CD’s at $15. The exchange rate must be $1 = 6 ²/ ³ Pesos. CD = $15(6 ²/³ ) = 100 pesos T-shirt = 50/(6 ²/³ ) = $7.50

15. How Exchange Rates Change 15 End ©2005 Charles W. Upton. All rights reserved