Question:
Which employer did David K. Levine work for in Dec, 2013?

Context:
 David K. Levine works for University of California, Los Angeles from Jul, 1988 to Jun, 2006. 
 David K. Levine works for European University Institute from Sep, 2013 to Dec, 2022. 
 David K. Levine works for University of Minnesota from Sep, 1987 to Jun, 1988. 
 David K. Levine works for Washington University in St. Louis from Jul, 2006 to Jun, 2016.

Answer:
Washington University in St. Louis