Because communication skills, especially writing, are such an integral part of managerial work, it may be postulated that these skills are associated with managerial success. Yet evidence of writing competency is not universally considered for admission to MBA programs. The purpose of this study was to investigate the possible correlation between the Analytical Writing Assessment Section (AWA) of the GMAT exam and a "critical thinking" writing assignment that is similar to the AWA. Results indicate that the AWA is significantly correlated with achievement, not only on the writing assignment but also with the final grade in a managerial communication course. (Contains 4 tables.)