Study by Lucian A. Bebchuk, Alma Cohen, and Charles C.Y. Wang finds the governance provisions (G-Index) used by Gompers, Ishii, and Metrick (2003) that showed abnormal returns during the 1991-1999 period was no longer associated with abnormal returns during the period of 2000-2008. Consistent with the learning hypothesis, they document that (i) attention to corporate […]