Barnard, John, Constantine E. Frangakis, Jennifer L. Hill, and Donald B. Rubin.M
"Principal Stratification Approach to Broken Randomized Experiments: A Case
Study of School Choice Vouchers in New York City." Journal of the American
Statistical Association 2003, 98: 462.
Greene, Jay P. "The Effect of School Choice: An Evaluation of the Charlotte
Children's Scholarship Fund." Civic Report No. 12. New York, NY: Manhattan
Institute for Policy Research, 2000.
Howell, William G., Patrick J. Wolf, David E. Campbell, and Paul E. Peterson.
"School Vouchers and Academic Performance: Results from Three
Randomized Field Trials." Journal of Policy Analysis and Management 2002,
21(2): 191-217.
Howell, William G., and Paul E. Peterson, with Patrick J. Wolf and David E.
Campbell. The Education Gap: Vouchers and Urban Schools. Washington,
DC: Brookings, 2002.
Mayer, Daniel P., Paul E. Peterson, David E. Myers, Christina Clark Tuttle, and
William G. Howell. School Choice in New York City After Three Years: An
Evaluation of the School Choice Scholarships Program. MPR Reference No.
8404-045. Cambridge, MA: Mathematica Policy Research, 2002.
Wolf, Patrick, Babette Gutmann, Nada Eissa, Michael Puma, and Marsha
Silverberg. Evaluation of the DC Opportunity Scholarship Program: First Year
Report on Participation. U.S. Department of Education, National Center for
Education Evaluation and Regional Assistance. Washington, DC: U.S.
Government Printing Office, 2005. Available online at:
http://ies.ed.gov/ncee/pubs/dc_choice.asp.
Wolf, Patrick, Babette Gutmann, Michael Puma, and Marsha Silverberg. Evaluation
of the DC Opportunity Scholarship Program: Second Year Report on
Participation. U.S. Department of Education, National Center for Education
Evaluation and Regional Assistance, NCEE 2006-4003. Washington, DC: U.S.
Government Printing Office, 2006. Available online at:
http://ies.ed.gov/ncee/pubs/dcchoiceyeartwo.asp.