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,...