“…Most prior research focuses on the observed characteristics in order to address particular theories. 5 When regressing the level of executive pay on explanatory variables, some papers control for firm fixed effects (Bertrand and Mullainathan, 2001, Chhaochharia and Grinstein, 2009, Frydman and Saks, 2010, Gabaix and Landier, 2008, Hubbard and Palia, 1995, Joskow et al, 1996, Kraft and Niederprum, 1999, Perry and Zenner, 2001), a few papers control for manager fixed effects (Aggarwal and Samwick, 1999, Garvey and Milbourn, 2003, Perry and Zenner, 2001, and none control for both at the same time. All these prior studies focus on observable determinants.…”