... Assumptions¹

Available from http://GKing.Harvard.Edu/yourcast via a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0, for academic use only. For expert programming assistance and many helpful comments, our thanks goes to Jon Bishof, Elena Villalon, and Nirmala Ravishankar.

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... Girosi²

Senior Policy Researcher, RAND Corporation, (1700 Main Street, PO Box 2138, Santa Monica, CA 90407-2138; http://www.ai.mit.edu/people/girosi/, girosi@rand.org, (310) 393-0411 x7794)

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... King³

David Florence Professor of Government, Harvard University (Institute for Quantitative Social Science, 1737 Cambridge Street, Harvard University, Cambridge MA 02138; http://GKing.Harvard.Edu, King@Harvard.edu, (617) 495-2027).

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