BUREAU OF ECONOMIC RESEARCH 1050 Massachusetts Avenue Cambridge, MA 02138 October 2014 This paper was prepared for the National Institute of Health Office of Behavioral and Social Sciences Research (NIH OBSSR), for inclusion in a publication entitled Review of Behavioral and Social Sciences Research Opportunities: Innovations in Population Health Metrics. This work was supported by National Institute on Aging (NIA) research grant P01 AG31098. We are grateful to Kaushik Ghosh and Jean Roth for advice…
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