Explaining Quality in Internet Collective Goods: Zealots and Good Samaritans in the Case of Wikipedia Denise Anthony, 1* Sean W. Smith, 2 Tim Williamson 3 November 2005 KEY WORDS: collective goods, public goods, group identity, reputation, open-source production WORD COUNT: 6,159 (main text, notes, references) TABLES: 7 FIGURES: 2 1 Department of Sociology, Dartmouth College, Hanover NH 03755 2 Department of Computer Science, Dartmouth College, Hanover, NH 03755 3 Ning, Inc., Palo Alto CA. This paper reports work done while a student at Dartmouth. * To whom correspondence should be addressed. Denise Anthony, Department of Sociology, HB6104, Dartmouth College, Hanover, NH 03755; email: danthony@dartmouth.edu