NBER Working Paper No. 24340
Issued in February 2018, Revised in July 2020
---- Acknowledgments ----
We thank Nils C. Wernerfelt for exceptional advice and guidance throughout this project. We are also immensely grateful to Janet Currie and Diane Alexander for their help in implementing their geographically granular influenza measure, to Mark Anderson and Dan Rees for providing their early twentieth century mortality data, and to Corey White for sharing his data on the influenza vaccine match rates by season. We also thank Susan Graber, Ryan Brown, and conference participants at the 2018 American Society of Health Economists conference for their comments and suggestions. We are especially grateful to two anonymous referees who provided extensive and insightful comments and suggestions. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.