而这也正是凯恩斯所明确的,他说:The long run is a misleading guide to current affairs. In the long run we are all dead。长期这个说法对于现实情况具有误导性,从长期来说,我们都会死掉。他还说: Economists set themselves too easy, too useless a task if in tempestuous seasons they can only tell us that when the storm is past the ocean is flat again.要是只会在危急时刻说阳光总在风雨后,这样的经济学家也太好当了。