True or False:
1. The aggregate expenditure model is best seen as a model of aggregate demand, and not a complete model of the economy.
2. The components of aggregate demand depend on the price level.
3. An increase in the price level would increase investment but decrease net exports.
4. An increase in the price level shifts up the aggregate expenditure function.
5. A change in the price level would shift the aggregate expenditure function but not aggregate demand.
6. When the aggregate expenditures function shifts up because of an increase in autonomous expenditures due to increased optimism, aggregate demand will shift right.
7. The price level has no effect on real output in the long run.
8. In the long run, an increase in government purchases will increase aggregate demand but not real output.
9. On the flat part of a short-run aggregate supply curve, a decrease in aggregate demand will primarily decrease real output and not change the price level.