About the Author

John Y. Campbell is the Otto Eckstein Professor of Applied Economics at Harvard University and a research associate of the National Bureau of Economic Research.

Martin Feldstein is the George F. Baker Professor of Economics at Harvard University and president and CEO of the National Bureau of Economic Research. He is the editor of many books, including Privatizing Social Security and International Capital Flows, also published by the University of Chicago Press.
Hometown: cambridge, MA