Consistent with previous research, the authors found that the combined use of undergraduate grade point average and the Graduate Management Admission Test (GMAT) verbal and quantitative sections successfully predicted performance in a master of business administration (MBA) program. However, these measures did not successfully predict the competencies that underlie managerial effectiveness, including communication, teamwork, decision making, leadership initiative, and planning and organizing. These competencies were better predicted, albeit imperfectly, by the analytical writing section of the GMAT. These findings are discussed with regard to the curriculum of MBA programs. (Contains 4 tables.)