Recent Publications

Incentives and Services for College Achievement: Evidence from a Randomized Trial
(with Daniel Lang and Philip Oreopoulos)
forthcoming, American Economic Journal: Applied Economics

Does Teacher Testing Raise Teacher Quality? Evidence from State Certification Requirements
(with Jon Guryan)
The Economics of Education Review, forthcoming, vol 27, no. 5 (October 2008)

Rural Windfall or a New Resource Curse? Coca, Income and Civil Conflict in Columbia
(with Adriana Kugler)
The Review of Economics and Statistics, Volume 90, No. 2 (May 2008)

Is Spanish-Only Schooling Responsible for the Puerto Rican Language Gap?
(with Aimee Chin and Ricardo Godoy)
The Journal of Development Economics, Volume 85, No. 1 (February 2008)

Treatment Effects
forthcoming in The New Palgrave

Long-Term Consequences of Secondary School Vouchers: Evidence from Administrative Records in Colombia
(with Eric Bettinger and Michael Kremer)
The American Economic Review, June 2006

Instrumental variables methods in experimental criminological research: what , why and how
The Journal of Experimental Criminology, April 2006

Quantile Regression under Misspecification, with an Application to the U.S. Wage Structure
(with Victor Chernozhukov and Ivan Fernandez-Val)
Econometrica, March 2006

Does School Integration Generate Peer Effects? Evidence from Boston's Metco Program
(with Kevin Lang)
The American Economic Review, December 2004, 1613-1634

American Education Research Changes Tack
Oxford Review of Economic Policy, Summer 2004, 198-212

Teacher Testing, Teacher Education, and Teacher Characteristics
(with Jon Guryan)
The American Economic Review, May 2004

Treatment Effect Heterogeneity In Theory and Practice
The Economic Journal, March 2004, C52-C83

When to Control for Covariates? Panel Asymptotics for Estimates of Treatment Effects
(with Jinyong Hahn)
The Review of Economics and Statistics, February 2004

Protective or Counter Productive? Labor Market Institutions and the Effect of Immigration on EU Natives
(with Adriana Kugler)
The Economic Journal, June 2003, F302-F331.

Vouchers for Private Schooling in Colombia: Evidence from Randomized Natural Experiments
(with Eric Bettinger, Erik Bloom, Elizabeth King, and Michael Kremer)
The American Economic Review, December 2002, 1535-1558.

New Evidence on Classroom Computers and Pupil Learning
(with Victor Lavy)
The Economic Journal, October 2002, 735-765.

How Do Sex Ratios Affect Marriage and Labor Markets? Evidence from America's Second Generation
The Quarterly Journal of Economics, August 2002, 997-1038.

Instrumental Variables Estimates of the Effect of Subsidized Training on the Quantiles of Trainee Earnings
(with Alberto Abadie and Guido Imbens)
Econometrica, January 2002, 91-117.

Instrumental Variables and the Search for Identification: From Supply and Demand to Natural Experiments
(with Alan Krueger)
The Journal of Economic Perspectives, Fall 2001, 69-85.

Consequences of Employment Protection? The Case of the Americans with Disabilities Act
(with Daron Acemoglu)
The Journal of Political Economy, October 2001, 915-957.

Does Teacher Training Affect Pupil Learning? Evidence From Matched Comparisons In Jerusalem Public Schools.
(with Victor Lavy)
The Journal Of Labor Economics, April 2001, 343-369.

Effects of Work-Related Absences on Families: Evidence from the Gulf War
(with John Johnson)
The Industrial and Labor Relations Review, October 2000, 41-58.

The Interpretation of Instrumental Variables Estimators in Simultaneous Equations Models with an Application to the Demand for Fish
(with Katy Grady, and Guido Imbens)
The Review of Economic Studies, July 2000, 499-527.