Media type: E-Article Title: Which Peers Matter? The Relative Impacts of Collaborators, Colleagues, and Competitors Contributor: Borjas, George J.; Doran, Kirk B. imprint: MIT Press - Journals, 2015 Published in: Review of Economics and Statistics Language: English DOI: 10.1162/rest_a_00472 ISSN: 0034-6535; 1530-9142 Origination: Footnote: