Roy Chen

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As a new paradigm of online communities, microfinance sites such as Kiva.org have attracted much public attention. To understand lender motivations on Kiva, we classify the lenders' self-stated motivations into ten categories with human coders and machine learning based classifiers. We employ text classifiers using lexical features, along with social(More)
  • Jan Boone, Roy Chen, Jacob K Goeree, Angelo Polydoro
  • 2007
Procurement auctions carry substantial risk when the value of the project is highly uncertain and known only to insiders. This paper reports the results from a series of experiments comparing the performance of three auction formats in such complex and risky settings. In the experiment, every bidder knows the private value for the project but only a single(More)
Underwater sensor networking is generally regarded as an emerging technology to conduct oceanic exploration and research in an automated and effective manner. As underwater operations become more sophisticated, there is an increasing demand for real-time video streaming. However, real-time video streaming requires high bandwidth as well as low latency.(More)
We investigate the effects of team competition on pro-social lending activity on Kiva.org, the first microlending website to match lenders with entrepreneurs in developing countries. Using naturally occurring field data, we find that lenders who join teams contribute 1.2 more loans per month than those who do not. Furthermore, teams differ in activity(More)
Analytical cytometry has significant potential beyond cellular analysis. The inherent capability of flow cytometers to efficiently discriminate between uniformly sized particles based on their intrinsic properties provides the foundation for multiplex bead assays. The technology can be exploited in designing immunoassays, Western blot-like antibody assays,(More)
Clara.io is a cloud and browser-based full featured 3D content creation tool that enables collaborative modelling, animation, simulation and rendering for independent and studio-affiliated artists. Our tool democratizes access to technology by making professional grade content creation capabilities and features accessible to all with internet access at a(More)
Social identity describes the part of an individuals sense of self that is derived from their perceived association with a social group. A key mechanism for social identity driven choice stems from the normative prescriptions associated with the identity. While social identity models have given rise to a rich set of empirical work, up until this point the(More)
  • Roy Chen, Yan Chen, Yang Liu, Qiaozhu Mei, Jim Andreoni, Vicki Bogan +9 others
  • 2014
We investigate the effects of team competition on pro-social lending activity on Kiva.org, the first microlending website to match lenders with entrepreneurs in developing countries. Using naturally occurring field data, we find that lenders who join teams contribute 1.2 more loans ($30-$42) per month than those who do not. To further explore factors that(More)
  • Qiang Fu, Changxia Ke, Fangfang Tan, Kai Konrad, Lional Page, John Morgan +4 others
  • 2013
Working papers of the Max Planck Institute for Tax Law and Public Finance Research Paper Series serve to disseminate the research results of work in progress prior to publication to encourage the exchange of ideas and academic debate. Inclusion of a paper in the Research Paper Series does not constitute publication and should not limit publication in any(More)
When does a common group identity improve efficiency in coordination games? To answer this question, we propose a group-contingent social preference model and derive conditions under which social identity changes equilibrium selection by changing the potential function. We test our predictions in the minimum effort game in the laboratory under parameter(More)
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