Working Papers

Did Vietnam Veterans Get Sicker in the 1990s?  The Complicated Effects of Military Service on Self-Reported Health
(with Stacey Chen and Brigham Frandsen)
March 2009

Informing the Debate: Comparing Boston’s Charter, Pilot and Traditional Schools
(with Atila Abdulkadiroglu, Sarah Cohodes, Sue Dynarski, Jon Fullerton, Tom Kane, and Parag Pathak)
Report to The Boston Foundation, January 2009

Long-Term Economic Consequences of Vietnam-Era Conscription: Schooling, Experience and Earnings
(with Stacey Chen)
August 2008

Causal Effects of Monetary Shocks: Semiparametric Conditional Independence Tests with a Mulitinomial Propensity Score
(with Guido Kuersteiner)
July 2008

Lead Them to Water and Pay Them to Drink: An Experiment with Services and Incentives for College Achievement
(with Phil Oreopoulos and Dan Lang)
December 2006

Multiple Experiments for the Causal Link Between the Quantity and Quality of Children
(with Victor Lavy and Analia Schlosser)
September 2006

New Evidence on the Causal Link Between the Quantity and Quality of Children
(with Victor Lavy and Analia Schlosser)
December 2005, NBER w11835

Semiparametric Causality Tests Using the Policy Propensity Score
(with Guido M. Kuersteiner)
December 2004, NBER w10975

The Effect of High School Matriculation Awards: Evidence from Randomized Trials.
(with Victor Lavy)
December 2002, NBER w9389

When to Control for Covariates? Panel-Asymptotic Results for Estimates of Treatment Effects.
(with Jinyong Hahn)
May 1999, NBER t0241

The Palestinian Labor Market Between the Gulf War and Autonomy
May 1998, MIT Economics Department Working Paper

The Effect of Teen Childbearing and Single Parenthood on Childhood Disabilities and Progress in School.
October 1996, NBER w5807

Conditioning on the Probability of Selection to Control Selection Bias
October 1996, NBER t0181