【摘要】Using a firm-level dataset from China’s A-share stock market over the period of 2001～2004,this paper examines the effects of large shareholder’s control rights and the separation between control rights and cash flow rights on firm value(Tobin-Q).We find that large shareholders’ control rights are associated with negative “entrenchment effect”.Also we find a negative effect with the separation.but it is different among different owner type:the negative effect is larger for central government-owned and university-owned listed firms,and is smaller for local government-owned and private-owned.