产品差异化、政府规制与产能过剩

Product Differentiation,Government Regulation and Excess Capacity

去产能是供给侧结构性改革的重中之重,需要政府和企业共同努力。通过构建双寡头垄断模型,考察是否存在部分管理授权条件下的产能过剩,以揭示产品差异化对产能过剩的作用机理,从而可以比较企业独立决策和政府干预决策下的产能过剩情况,并基于社会福利最大化原则探索最优的产品差异化水平。研究表明:产品差异化与产能过剩之间存在密切关系,不同条件下的产品差异化对产能过剩的作用存在显著差异;政府的产能规制政策未必会彻底化解产能过剩;产品差异化程度与社会福利水平呈正相关,需要鼓励企业走产品差异化发展之路。这些研究结论对中国目前的去产能改革具有一定的启示意义。

De-capacity is the most important aspect of the structural reform of the supply-side and needs joint efforts of government and enterprises. This paper builds a duopoly model to study whether there exists the condition of excess capacity under partial management authorization and reveals the mechanism of product differentiation to excess capacity,so as to compare two cases of excess capacity in the condition of enterprises and government when they make capacity decision,and to explore the best level of product differentiation based on the maximization of social welfare. The results showthat there is a close relationship between product differentiation and excess capacity,and the effect of the former on the latter exists significant difference in different conditions. Government capacity regulation policy may not solve the excess capacity thoroughly,the degree of product differentiation and the level of social welfare are positively related,and enterprises should be encouraged to take the road of product differentiation. These conclusions have some enlightenment to the current capacity reform.