Review of academic, financial and other matters may lead to changes in policies. While every effort has been made to ensure that this Ph.D. Handbook is accurate and up to date, it may include inaccuracies or outdated information due to changes that have been implemented after publication. To verify any of the information contained in this Handbook, contact the Dean's Office of the Graduate School of Arts and Sciences at 212.854.2861 or gsas_dean@columbia.edu