WORK IN PROGRESS 

• Equilibrium  Labor Market Search and Health Insurance Reform
  (with Naoki Aizawa).

• Difference-in-Difference Estimators of Prejudice: An Examination of the Existing Test and An Alternative
  (with Nicola Persico), Coming Soon.
  [Click Title to View the Slides]

• Why Do Life Insurance Policyholders Lapse? The Roles of Income, Health and Bequest Motive Shocks
  (with Edward Kung), this draft: May 2, 2010.

• The Welfare Effect of Life Settlement Market: The Case of Income Shocks
  (with Edward Kung)

• An Alternative Test of Hyperbolic Discounting Based on Sensitivity of Parameter Estimates to Time Aggregation
  Work in Progress, August 2009.

• Cognitive Ability and Retiree Health Care Expenditure
  Michigan Retirement Research Center Working Paper 230.
  (with Lauren Nicholas and Dan Silverman), this draft: September 2010.

  RECENT WORKING PAPERS

• An Experimental Study of Alternative Campaign Finance Systems: Donations, Elections and Policy Choices
  (with Dmitry Shapiro and Arthur Zillante), This Version, August 2011, NBER Working Paper No. 17384.

• Testing for the Role of Prejudice in Emergency Departments Using Bounceback Rates
  (with Shamena Anwar). This Version, August 2011.
  An earlier version appeared as NBER Working Paper No. 16888.

• Estimating Dynamic Discrete Choice Models with Hyperbolic Discounting, with an Application to Mammography Decisions
  (with Yang Wang), First version: January 2009; This Version, January 2012, Revised and Resubmitted, Review of Economic Studies.
  An earlier version appeared as NBER Working Paper No. 16438.

• Toward an Efficiency Rationale for the Public Provision of Private Goods
  (with Peter Norman), This Version,  June 2010.
  Appendix: Omitted Details for Some Derivations 
  An earlier version appeared as NBER Working Paper 13827.

• How Does Life Settlement Affect the Primary Life Insurance Market?
  (with Edward Kung), revised, February 2010, NBER Working Paper 15761.

• The Effect of Microinsurance on Economic Activities: Evidence from a Randomized Natural Field Experiment
  (with Hongbin Cai, Yuyu Chen and Li-An Zhou), This Version, December 2010, Revise and Resubmit, Review of Economics and Statistics.
  An earlier version appeared as NBER Working Paper 15396.

• Overcoming Participation Constraints
  (with Peter Norman), This Version, February 2006.
  Detailed Appendix for the derivations in the unraveling example.

• Separate When Equal? Racial Inequality and Residential Segregation
  (with Patrick Bayer and Robert McMillan), This Version, June 2011.
  An earlier version appeared as NBER Working Paper 11507.

    PUBLISHED OR FORTHCOMING PAPERS

• Dynamic Inefficiencies in an Employment-Based Health Insurance System: Theory and Evidence
  (with Alessandro Gavazza), American Economic Review, Vol 101, No. 7, December 2011, 3047-3077.
  An online appendix with omitted details is here.
  An earlier version appeared as NBER Working Paper 13371

• .Does Affirmative Action Lead to Mismatch? A New Test and Evidence
  (with Peter Arcidiacono, Esteban M. Aucejo and Kenneth I. Spenner),  Quantitative Economics, No. 2, November 2011, 303–333
  An online appendix with omitted details is here.
  An earlier version appeared as NBER Working Paper 14855.
  [Media coverage at Inside Higher Education]

• Eat, Drink, Firms and Government: An Investigation of Corruption from Entertainment and Travel Costs of Chinese Firms
  (with Hongbin Cai and Lixin Xu),  Journal of Law and Economics, Vol. 54, No. 1, February 2011, 55-78.
  [Media Coverages: South China Morning Post, Singapore Strait Times]
  [NBER Working Paper 11592 Version] [April 2009 Version]

• Field Research on Learning, Entry in Encyclopedia of the Sciences of Learning, edited by Norbert Seel, Springer, 2011.

• Optimal Provision of Multiple Excludable Public Goods
  (with Peter Norman), American Economic Journal: Microeconomics, November 2010, Vol. 2, No. 4, 1-37.
  Corrigendum for a printing error is here.
  Detailed External Appendix.
  This paper generalizes and supersedes versions previously titled "An Efficiency Rationale for Bundling of Public Goods" available as Cowles Foundation Discussion Paper 1441 and 1441R.
  

• Theories of Statistical Discrimination and Affirmative Action: A Survey
  (with Andrea Moro),  Chapter 5 in Handbook of Social Economics, Vol IA, edited by Jess Benhabib, Alberto Bisin, and Matthew Jackson, North-Holland, 2010, pp. 133-200.

•  Time Inconsistency and Welfare Program Participation: Evidence From the NLSY
  (with Dan Silverman), International Economic Review, November 2009, Vol. 50, No. 4, 1043-1076.
  
  
•  Observational Learning: Evidence from a Randomized Natural Field Experiment
  (with Hongbin Cai and Yuyu Chen), American Economic Review, June 2009, Vol. 99, No. 3, 864-882.
  [Media coverage at: Wall Street Journal, LA Times, Duke News]
  [Online Appendix]
  [NBER Working Paper No. 13516 Version].

• Understanding Overbidding in Second Price Auctions: An Experimental Study
  (with David J. Cooper), Economic Journal, October 2008, Vol. 118, 1572–1595
  [Cowles Foundation Discussion Paper No. 1557 Version]

• Sources of Advantageous Selection: Evidence from the Medigap Insurance Market
  (with Michael P. Keane and Dan Silverman),  Journal of Political Economy, April 2008, Vol. 116, No. 2,  303-350.
  Winner of the 17th Kenneth Arrow Award for the Best Paper in Health Economics Published in 2008, iHEA
  Finalist, NIHCM (National Institute for Health Care Management) Foundation Annual Research Award, 2009.
  [NBER Working Paper 12289 Version]

• Testing the Mechanisms of Structural Models: The Case of the Mickey Mantle Effect
  (with Michael P. Keane, Ahmed Khwaja, Martin Salm and Dan Silverman), American Economic Review Papers and Proceedings, May 2007, 53-59.
  [Appendix]  [Click Here for a version with the complete tables]
  
  
• To Bundle or Not to Bundle
  (with Peter Norman), Rand Journal of Economics, Winter 2006, Vol. 37, No. 4, 946-963.
  Supplemental Material: Appendix B. Mathematica Program for Numerical Analysis.

• Disentangling the College Wage Premium: Estimating a Model with Endogenous Education Choices
  International Economic Review, November 2006, Vol. 47, No. 4, 1151-1185. 

• Government-Mandated Discriminatory Policies: Theory and Evidence
  (with Peter Norman), International Economic Review, May 2006, Vol. 47, No. 2, 361-189.

•  An Alternative Test of Racial Prejudice in Motor Vehicle Searches: Theory and Evidence
  (with Shamena Anwar), American Economic Review, March 2006, Vol. 96, No. 1, 127-151.

• Distinguishing Between Cognitive Biases: Belief vs. Time Discounting in Welfare Program Participation
  (with Dan Silverman), in Behavioral Public Finance, edited by Edward McCaffery and Joel Slemrod,  pp. 47-81. Russell Sage Foundation, 2006.

• Multidimensional Private Value Auctions
  (with Stephen Morris), Journal of Economic Theory, January 2006, Vol. 126, 1-30. 

• Toward An Economic Theory of Dysfunctional Identity
  (with Glenn C. Loury)  in Social Economics of Poverty: On Identities, Groups, Communities and Networks, pp. 12-55. Edited by Christopher B. Barrett, London: Routledge, 2005.

• "Dysfunctional Identities" Can Be Rational
  (with Glenn C. Loury),  American Economic Review Papers and Proceedings, May 2005, May 2005: 104-111. 
  
  
• Morale Hazard
  (with Giuseppe Moscarini), Journal of Monetary Economics, May 2005, Vol. 52, 749-777. 
  
  
• Assessing the Impact of Welfare Reform on Single Mothers
  (with Michael P. Keane), Brookings Papers on Economic Activity, 2004, Volume 1, 1-116.

• On the Compassion of Time-Limited Welfare Programs
  (with Dan Silverman), Journal of Public Economics, Vol. 88, July 2004, 1445-1470. 

• On the Failure of the Linkage Principle with Financially Constrained Bidders   [Typesetting Error Correction] 
  (with Sergio O. Parreiras), Journal of Economic Theory, Vol 110, June 2003, 374–392.

•  Lottery versus All Pay Auction Models of Lobbying
  Public Choice, September 2002, 351-371.

• Equilibrium of Affiliated Value Second Price Auctions with Financially Constrained Bidders: The Two-Bidder Case
  (with Sergio O. Parreiras), Games and Economic Behavior, May 2002, 215-236.

• Social Culture and Economic Performance 
  American Economic Review,  September 2001, Vol. 91, No. 4, 924-937.

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