Article Information
vol. 343 no. 6177 1316-1317
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Author Information
- 1Duke University, Durham, NC 27708, USA.
- 2National Bureau of Economic Research, Cambridge, MA 02138, USA.
- 3Resources for the Future, Washington, DC 20036, USA.
- 4Center for Global Development, Washington, DC 20036, USA.
- ↵*Corresponding author: richard.newell{at}duke.edu