TY - JOUR AU - Freeman, Richard B AU - Huang, Wei TI - Collaborating With People Like Me: Ethnic co-authorship within the US JF - National Bureau of Economic Research Working Paper Series VL - No. 19905 PY - 2014 Y2 - February 2014 DO - 10.3386/w19905 UR - http://www.nber.org/papers/w19905 L1 - http://www.nber.org/papers/w19905.pdf N1 - Author contact info: Richard B. Freeman NBER 1050 Massachusetts Avenue Cambridge, MA 02138 Tel: 617/868-3900 Fax: 617/868-2742 E-Mail: freeman@nber.org Wei Huang NUS Business School Mochtar Riady Building, #7-76 15 Kent Ridge Driver, Singapore 119245 Singapore Tel: +65 6601 3455 Fax: +65 6779 5059 E-Mail: huangw@nber.org M1 - published as Richard B. Freeman, Wei Huang. "Collaborating with People Like Me: Ethnic Coauthorship within the United States," in Sarah Turner and William Kerr, organizers, "US High-Skilled Immigration in the Global Economy" (University of Chicago Press), Journal of Labor Economics, Volume 33, S1, part 2 (2015) M2 - featured in NBER digest on 2014-07-24 AB - This study examines the ethnic identity of authors in over 2.5 million scientific papers written by US-based authors from 1985 to 2008, a period in which the frequency of English and European names among authors fell relative to the frequency of names from China and other developing countries. We find that persons of similar ethnicity co-author together more frequently than predicted by their proportion among authors. Using a measure of homophily for individual papers, we find that greater homophily is associated with publication in lower impact journals and with fewer citations, even holding fixed the authors' previous publishing performance. By contrast, papers with authors in more locations and with longer reference lists get published in higher impact journals and receive more citations than others. These findings suggest that diversity in inputs by author ethnicity, location, and references leads to greater contributions to science as measured by impact factors and citations. ER -