非对称规制与产业绩效——基于效率松弛模型的分析

在经济转轨国家的自然垄断产业中，民营资本的进入是一种不得已而为之的战略选择。采用效率松弛模型对民营资本的进入所带来的影响进行动态的分析，可以发现，在短期，民营资本的进入确实可以带来产业效率和社会福利水平的提高，但从长期来看，如果不能实施有效的非对称规制，则这种效应不能持久。因此，放松进入规制、引入民营资本的同时必须实施非对称规制，使得民营企业迅速成长为可以与在位的国有企业势均力敌的竞争力量，才能在长期提高产业的效率和社会福利水平。

Asymmetric Regulation and Efficiency: Based on the Model of Efficiency Slack

In the transition economy,natural monopoly industry has to relax entry regulation,introduce private capital for the financial pressure.Through research based on the theory"based on a notion of slack-ridden profit maximization",such conclusion can de drawn that in the short-term,the entry of private capital may improve the industrial efficiency and the social welfare,but in long-term,such effect is not certainly lasting.Therefore,after introduction competition,the government must implement the asymmetrical regulation to insure the private enter- prise grow rapidly to match the state-owned enterprise in competition strength.