1. Selection on Observed and Unobserved Variables: Assessing the Effectiveness of Catholic Schools;Joseph G Altonji;Journal of Political Economy,2005
2. Fiscal Shenanigans, Targeted Federal Health Care Funds, and Patient Mortality;K Baicker;Quarterly Journal of Economics,2005
3. Immigrants and Employer-Sponspored Health Insurance;Thomas C Buchmueller;Health Services Research,2007
4. Competition and Quality: Evidence from the NHS Internal Market 1991-1999;Simon Burgess;Journal of Public Economics,2004