Inferring Welfare Maximizing Treatment Assignment under Budget Constraints
This paper concerns the problem of allocating a binary treatment among a target population based on observed covariates. The goal is to (i) maximize the mean social welfare arising from an eventual outcome distribution, when a budget constraint limits what fraction of the population can be treated and (ii) to infer the dual value, i.e. the minimum resources needed to attain a specific level of mean welfare via efficient treatment assignment. We consider a treatment allocation procedure based on sample data from randomized treatment assignment and derive asymptotic frequentist confidence interval for the welfare generated from it. We propose choosing the conditioning covariates through cross-validation. The methodology is applied to the efficient provision of anti-malaria bed net subsidies, using data from a randomized experiment conducted in Western Kenya. We find that subsidy allocation based on wealth, presence of children and possession of bank account can lead to a rise in subsidy use by about 9 percentage points compared to allocation based on wealth only, and by 17 percentage points compared to a purely random allocation.
Previously circulated under the title: "Nonparametric Inference on Efficient Treatment Assignment under Budget Constraints." We thank seminar participants at Dartmouth, Oxford, UCL and the World Bank for useful comments. Dupas gratefully acknowledges funding from the Acumen Fund. The views expressed herein are those of the author(s) and do not necessarily reflect the views of the National Bureau of Economic Research.
Bhattacharya, Debopam & Dupas, Pascaline, 2012. "Inferring welfare maximizing treatment assignment under budget constraints," Journal of Econometrics, Elsevier, vol. 167(1), pages 168-196. citation courtesy of