@inproceedings{conf/dagstuhl/ChenHKL07,
	title = {Social Comparisons and Contributions to Online Communities: A Field Experiment on MovieLens.},
	author = {Yan Chen and F. Maxwell Harper and Joseph A. Konstan and Sherry Xin Li},
	booktitle = {Computational Social Systems and the Internet},
	crossref = {conf/dagstuhl/2007P7271},
	editor = {Peter Cramton and Rudolf Müller and Éva Tardos and Moshe Tennenholtz},
	publisher = {Internationales Begegnungs- und Forschungszentrum fuer Informatik (IBFI), Schloss Dagstuhl, Germany},
	series = {Dagstuhl Seminar Proceedings},
	url = {http://dblp.uni-trier.de/db/conf/dagstuhl/P7271.html#ChenHKL07},
	volume = {07271},
	year = {2007},
	biburl = {http://www.bibsonomy.org/bibtex/20db86305046eb1b6a23be8db64372854/dblp},
	description = {dblp},
	date = {2008-05-14}, ee = {http://drops.dagstuhl.de/opus/volltexte/2007/1155},
	keywords = {dblp }
}