American Behavioral Scientist Vol. 47, Issue 5, Pages 699-717 January 2004 HKS Authors See citation below for complete author information. Paul Peterson Professor of Public Policy, HKS; Henry Lee Shattuck Professor of Government, FAS Citation Peterson, Paul E., and William G. Howell. “Efficiency, Bias, and Classification Schemes: A Response to Alan B. Krueger and Pei Zhu." American Behavioral Scientist 47.5 (January 2004): 699-717.