Complex sentence: He holds a PhD in economics from the University of Michigan at Ann Arbor and has published over 70 articles in academic journals, he also was an associate editor of the Journal of Comparative Economics from 2004 to 2009.
Split into simpler sentences: He holds a PhD in economics from the University of Michigan at Ann Arbor and has published over 70 articles in academic journals. Dr. Djankov was also an associate editor of the Journal of Comparative Economics from 2004 to 2009.