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1 From the Department of Economics, University of Calgary, Calgary, AB, Canada, and Incentives for Global Health, Washington, DC (A.H.); and the Department of Economics, University of Toronto, Toronto (Z.A.).
1 From the Department of Economics, University of Calgary, Calgary, AB, Canada, and Incentives for Global Health, Washington, DC (A.H.); and the Department of Economics, University of Toronto, Toronto (Z.A.).