改革开放以来,我国经济保持持续、快速地增长,但是在增长的过程中,却伴随着时而高涨,时而紧缩。经济波动的原因,从需求方面来说,有消费需求和投资需求,从供给方面来说,可能是成本推动的,如果由需求引致的波动,首先表现为需求对象的价格的上涨和下降的波动,供给成本的改变对产品 Since the reform and opening up, China’s economy has maintained a sustained and rapid growth. However, it has been increasing and sometimes contracting in the process of growth. The causes of economic fluctuations, from the demand side, consumer demand and investment demand, from the supply side, may be cost-driven, if demand-induced volatility, the first performance of the rising price of the object of demand and fluctuations in the decline , Changes in supply costs to the product