改革开放,商品价格放开,打破了我国自解放以来几十年商品价格基本不变的局面,给经济的发展带来了生机与活力。商品价格改革,不仅与人民切身利益密切相关,是人们最为敏感的问题之一;同时在目前也是经济改革成败的关键。引起商品价格变动的因素较多,如商品价格除了要符合其价值和国家有关政策外,还受到消费者的收入、代用商品的价格、消费者人数、季节变化等多因素的制约。本文仅就只考虑价格变动对需求量的影响,进而研究 Since the reform and opening up, the liberalization of commodity prices has broken the basic unchanged commodity prices in our country for several decades since liberation, bringing vigor and vitality to the economic development. The reform of commodity prices is not only closely related to the vital interests of the people, but also one of the most sensitive issues for people. At the same time, it is also the key to the success or failure of economic reforms. There are many factors causing changes in commodity prices. For instance, in addition to meeting the value of commodities and the relevant state policies, the prices of commodities are subject to many factors, such as the income of consumers, the price of substitute products, the number of consumers and seasonal changes. This article only consider the price changes on the impact of demand, and then study