Reading 23: Aggregate Supply and Aggregate Demand LOSB习题精选

The aggregate demand curve plots real GDP against the price level. Rising entitlement payments that result from an increasing price level affect nominal GDP, but not real GDP. Both remaining choices describe reasons why the consumption and investment components of real GDP decrease when the price level increases.

The components of aggregate demand are consumption, investment, government spending, and net exports, which is exports minus imports.

An increase in the expected rate of inflation is most likely to cause aggregate demand and short-run aggregate supply to:

When incomes in foreign countries increase, it is unlikely to have a direct effect on interest rates in the U.S. However, increased foreign income is likely to result in greater foreign purchases of U.S. exports. Thus, aggregate demand in the U.S. is likely to increase.

At higher price levels, consumption, investment, and net exports all decrease. A rising price level decreases consumers’ real wealth, so they consume less. The higher price level will increase interest rates, which causes business investment to decrease. Rising domestic prices will also reduce foreign purchases of the country’s goods, decreasing net exports.

If business and consumer optimism wanes, consumers will spend less and defer current consumption and save more of their disposable income. With reduced product demand, businesses will reduce their capital expenditures and investments. These actions will lead businesses to reduce their number of employees, thereby increasing the rate of unemployment. Moreover, current output will decrease and the price level will fall.

Both statements are incorrect. The wealth effect causes real consumption spending to decrease at higher price levels because consumers have less wealth in real terms, and consequently spend less. When interest rates increase, consumers spend less in the current period as they delay purchases until future periods. They substitute purchases later for purchases now (intertemporal substitution).

While an increase in real wealth will shift the AD curve to the right, an increase in the real rate of interest will shift the AD curve to the left as consumers and businesses reduce their borrowing and spending. An expected decrease in prices will shift the AD curve to the left as households and businesses postpone their consumption in anticipation of lower prices in the future.