This is a special 2017 edition of the Columbia Journal of Tax Law including an introduction by Alex Raskolnikov and articles by Michael J. Graetz, David A. Weisbach, Reuven S. Avi-Yonah, Kimberly Clausing, Leonard E. Burman, James R. Nunns, Benjamin R. Page, Jeffrey Rohaly, Joseph Rosenberg, and David S. Miller.