在凯恩斯看来,投资是购买资产的行为,投资量为一定时期资本的价值增殖。略去政府收支和进出口,国民生产总值等于消费与投资之和,或等于消费与储蓄之和。凯恩斯理论的主要任务是解决失业问题。在资 In Keynes’s view, investment is the purchase of assets, the amount of investment for a certain period of time the value of capital proliferation. Slightly go to the government revenue and expenditure and import and export, gross national product equal to the sum of consumption and investment, or equal to the sum of consumption and savings. Keynesian theory’s main task is to solve the unemployment problem. In the capital