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|a Research support from the National Science Foundation, Collaborative Research: "An Experimental Producer Price Index for Clinical Trials" to the National Bureau of Economic Research, Award Number 0915674, and Boston University, Award Number 0915677, is gratefully acknowledged. We thank Medidata Solutions Worldwide, Inc. ("Medidata") for supplying database extracts, Ed Seguine (formerly at Fast Track Solutions, Inc. and Medidata) for helpful discussions, Rafael Campo and other individuals at Medidata for helpful comments and data support, and Marshall Reinsdorf from the Bureau of Economic Analysis for constructive discussant's comments at the Annual Meetings of the American Economic Association in San Diego, CA, January 6, 2013. Rania Gihleb provided able research assistance. The opinions expressed herein are those of the authors, and do not necessarily reflect those of the National Science Foundation, Medidata, or the institutions with whom the authors are affiliated. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research
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