假设对一国产品的私人总需求突然发生了永久性下降（即总需求曲线向下平移)，它对产出有何影响？你将提议政府采取何种政策？

假设对一国产品的私人总需求突然发生了永久性下降(即总需求曲线向下平移)，它对产出有何影响？你将提议政府采取何种政策？

Suppose there is a permanent fall in private aggregate demand for a country's output(a downward shift of the entire aggregate demand schedule)．What is the effect on output？ What government policy response would you recommend？