经济学理论已经明确,在完全竞争的前提下,市场机制可以实现资源的有效配置。但现实经济生活中,由于规模经济等因素的作用,大多数产业内企业与企业之间的结构关系偏离完全竞争的市场结构模型,而形成规模经济与竞争兼容的垄断竞争型或寡占型市场结构。由于偏离完全竟争的结果可能导致 Economic theory has been clear, under the premise of complete competition, the market mechanism can achieve the effective allocation of resources. However, in real economic life, due to the effects of economies of scale and other factors, the structural relations between enterprises and enterprises in most industries deviate from perfectly competitive market structure models and form monopolistic competitive or oligopoly market structures compatible with economies of scale . As a result of deviation from the full competition may result