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Andreoni, James, Callen, Mike, Hussain, Karrar, Khan, Muhammad Yasir and Sprenger, Charles (2022) Using preference estimates to customize incentives: an application to Polio vaccination drives in Pakistan. Journal of the European Economic Association. ISSN 1542-4766
Callen, Mike, Andreoni, James, Khan, Yasir, Jaffar, Karrar and Sprenger, Charles (2018) Using preference estimates to customize incentives: an application to polio vaccination drives in Pakistan. NBER Working Papers (22019). National Bureau of Economic Research, Cambridge, MA.