中国煤炭产业集中度与绩效的实证分析

Positive Analysis on Concentration and Performance of China Coal Industry

本文根据哈佛学派的“集中度——利润率假说”,对1990-2005年中国煤炭产业的市场集中度和所有权集中度与利润绩效和安全绩效之间的关系进行了实证分析。结果表明,以HHI指数表示的市场集中度的提高对利润绩效和安全绩效的改善有着显著的影响;而国有所有权集中度则对利润绩效和安全绩效无显著影响。通过引入虚拟变量,发现煤炭产业市场化改革有利于其绩效的改善。

According to the SCP model, the paper analyses the relationship between structure and performance of China coal industry from 1990yr. to 2005yr.. The regression results show that the increase of HHI index which represents the market concentration has notable effect to profit performance and safety performance. By introducing the dummy variable to represent management system reform, it finds that the coal industry marketization reform helps to improve the profit performance and safety performance.