7BHAGAT S, BLACK B. 2002. The non-corelation between board composition and long- term firm performance[ J]. Journal of Corporation Law, (27) :231 -241.
8FAMA E F,JENSEN M C. 1983. Separation of ownership and control [ J ]. Journal of Law and Economics, ( 26 ) : 301 - 325.
9MCCONNELL J J, SERVAES H. 1990. Additional evidence on equity ownership and corporate value [ J ]. Journal of Financial Economics, ( 27 ) :595 - 612.
10MCNEIL A J. 1999. Extreme value theory for risk managers [J]. International Reviews of Financial Analysis, (5): 300 - 340.