TY - JOUR T1 - When Do Leaders Matter? Ownership, Governance and the Influence of CEOs on Firm Performance JF - Leadership Quarterly Y1 - 2014 A1 - Clark,Jonathan R A1 - Murphy,Chad A1 - Singer,Sara KW - Management VL - 25 CP - 2 U2 - a U4 - 84307111936 ID - 84307111936 ER -