6Jensen M C,Murphy K J. Performance pay and top -management incentives [ J ] . Journal of Political E-conomy , 1990,98(2) :225-264.
7Core J E,Holthausen R W,Larker D F. Corporategovernance , chief executive officer compensation , andfirm performance [ J ] . Journal of Financial Econom-ics , 1999,51 (3) ;371-406.
8Peng L, Roell A. Executive pay and shareholder litiga-tion [J] . Review of Finance,2008,12( 1 ) : 141-184.
9Jensen M C,Meckling W H. Theory of the firm :Managerial behavior,agency costs and ownershipstructure [ J ] . Journal of Financial Economics,1976,3(4) :305-360.
10Holmstrom B. Moral hazard and observability [ J ].The Bell Journal of Economics , 1979,10( 1) :74-91.