Cook, T. D. (1999).Considering the major Arguments against random assignment: An analysis of the intellectual culture surrounding evaluation in American schools of education. Retrieved June 8, 2008 from

Gennetian, L. A., Bos, J. M., & Morris, P. A. (2002). Using instrumental variable analysis to learn more from social policy experiments. Retrieved May 21, 2008 from

Howell, D. (2001). Randomization tests on correlation coefficients. Retrieved November 23, 2008 from

Schoier, G. (2004). On partial nonresponse situations: The hot deck imputation method. Retrieved June 10, 2008, from

Yuan, Y. (2004). Multiple imputation for missing data: Concepts and new development. Retrieved March 8, 2008, from

Website Terms and Conditions and Privacy Policy
Please send comments or suggestions about this Website to