中国经济改革与发展论坛系列讲座

讲座题目：中国企业竞争加剧还是垄断增强？抽样数据的系统性估计偏差与修正  

主讲人： 张琼 讲师、经济学博士  

主要研究领域：人口与宏观政策、企业投资经营行为  

讲座时间：2013年05月22日11:30-13:30  

讲座地点：经济学院大会议室  

主讲人介绍：  

Monopoly is one of themost basic and important economic issues, among which, its trend, namely moremonopoly or more competition over years, is the heart of such debates. In thispaper, both of trumpeted and balanced panel data imply fast decreasing HHIs,and simulated Zipf distributions consistently imply fast decreasing shapeparameters. For most industries in recent China, original trumpeted data dosignificantly overestimate trend in competition for industries which expand whereasunderestimate for industries which shrink, and this overestimation and/orunderestimation gets much more severe over periods. Besides, results fromsimulated Zipf distributions indicate more severe bias with original trumpeteddata in most cases.  

欢迎各位老师、同学前来参加！  

经济学院  

2013年05月14日