Sean Joe installed as Benjamin E. Youngdahl Professor February 5, 2015 SHARE Chancellor Mark S. Wrighton installs the Brown School’s Sean Joe, PhD, as the Benjamin E. Youngdahl Professor of Social Development during a ceremony Jan. 26 in Brown Lounge. Joe came to Washington University in St. Louis last summer from the University of Michigan. He is a leading authority on suicide among black Americans, specifically black adolescent males. For more on Joe and his academic interests, visit here. (Credit: Whitney Curtis/WUSTL Photos)