Martin Gaynor, Samuel Kleiner, and William Vogt, "Analysis of Hospital Production: An Output Index Approach", Journal of Applied Econometrics, Vol. 30, No. 3, 2015, pp. 398-421. The data used in the article are from the California Office of Statewide Health Planing and Development. OSHPD does not permit open access or distribution of these data. This data source is administered by: Healthcare Information Resource Center 400 R Street, Suite 250 Sacramento, CA 95811-6213 The data and variables used in our study are described in the file gkv-variables.txt, which is zipped in the file gkv-file.zip. Please address any questions to: Samuel Kleiner Dept. of Policy Analysis and Management Cornell University MVR 108 Ithaca, NY 14853 USA skleiner [AT] cornell.edu