Macroeconomics 8th Edition by David Colander

Exercise 2

During the Depression, unemployment rose to 25 percent. The AS / AD model presented in the book suggests that a fall in the price level would have solved the problem. Keynesians are not so convinced and believe that a fall in the price level would havea. Demonstrate the standard argument graphically.
b. How does it deal (or not deal) with that interconnection between a fall in the price level and aggregate demand? (Post-Keynesian)