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A specialist in political systems and comparative politics , he is director of the University of Maryland 's Center for the Study of Post-Communist Societies , having served as chairman of the editorial committee ( 2004 – 2008 ) and editor ( 1998 – 2004 ) of the " East European Politics and Societies " academic review .
 University of Maryland, Center for the Study of Post-Communist Societies
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
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Answer:
 University of Maryland, Center for the Study of Post-Communist Societies