产品质量问题一直是困扰中国企业和消费者的重要问题,利用Cobb-Douglas型函数模型从供需两个方面可进一步分析其中的原因。研究发现,一是行业的厂商竞争程度和消费者对于产品质量的偏好共同决定了产品质量的高低;二是对于不同类型的行业,行业竞争增加对于产品质量的影响不同,政府应根据不同行业的特点对竞争程度加以控制,避免过度扩张导致产能过剩。 Product quality has always been an important problem for Chinese enterprises and consumers. Cobb-Douglas function model can be used to further analyze the reasons from the two aspects of supply and demand. The research shows that firstly, the degree of competition in the industry and the preference of consumers for product quality jointly determine the level of product quality; secondly, for different types of industries, the impact of increased industry competition on product quality is different, and the government should, according to different industries Features To control the degree of competition, to avoid over-expansion lead to overcapacity.