Based on the data of companies listed on A-share market from the year 2001 to 2009, this paper measures product market power and the information content of stock price by using an event study method. Then I explore the relationship between product market power, corporate governance and the...

Based on the data of companies listed on A-share market during the year 2001 to 2009, this paper explores the relationship between product market power and trade volume in the view of heterogeneous beliefs. It's found that the improvement of product market power significantly promotes trading,...

Based on the data of 786 companies listed on A-share market during 2001 to 2009, this paper studies firm-specific return volatility. It's found that the absolute level of firm-specific volatility is rising, while the weight of firm-specific volatility is decreasing, which implies declining...

Based on the data of A-share market from the year 2001 to 2009, we tests Peress's (2010) proposition that product market power reduce heterogeneous beliefs in the stock market. Also factors suggested by Miller (1977) that may influence heterogeneous beliefs are analyzed. We find product market...