Putting the Co in Education: Timing, Reasons, and Consequences of College Coeducation from 1835 to the Present. Claudia Goldin, Lawrence Katz, August 2010, Paper. “The history of coeducation in U.S. higher education is explored through an analysis of a database containing information on all institutions offering four-year undergraduate degrees that operated in 1897, 1924, 1934, or 1980, most of which still exist today. These data reveal surprises about the timing of coeducation and the reasons for its increase. Rather than being episodic and caused by financial pressures brought about by wars and recessions, the process of…” Link