The citation is here:
Matthew Gentzkow has made fundamental contributions to our understanding of the economic forces driving the creation of media products, the changing nature and role of media in the digital environment, and the effect of media on education and civic engagement.
Matt is at the Booth School of Business at the University of Chicago and there is much more at that link. Here is Matt at scholar.google.com. Matt’s well-known paper on ideological segregation, with Jesse Shapiro, is here (pdf). Our class on the economics of the media at MRUniversity.com considers Matt’s work, for instance see this video on ideological segregation.
An excellent choice, of course, and hearty congratulations are in order.