Working Papers

Classification Trees for Heterogeneous Moment-Based Models

Working Papers

Authors: Sam Asher, Denis Nekipelov, Paul Novosad, and Stephen P. Ryan Abstract: A basic problem in applied settings is that different parameters may apply to the same model in different populations. We address this problem by proposing a method using moment trees; leveraging the basic intuition of a classification tree, our method partitions the covariate space […]

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Delivering Education to the Underserved through a Public-Private Partnership Program in Pakistan

Working Papers

NBER Working Paper W23870. Link to paper: [PDF] Abstract: We contribute to the school-competition literature by evaluating a program that randomly assigned private schools to underserved villages in Pakistan. Program schools were provided a per-student subsidy to provide tuition-free primary education, with half of the treated villages receiving a higher subsidy for female students. The […]

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The Welfare Effects of Supply-Side Regulations in Medicare Part D

Working Papers

Authors: Francesco Decarolis, Maria Polyakova, Stephen P. Ryan Abstract: The efficiency of publicly-subsidized, privately-provisioned social insurance programs depends on the interaction between insurer behavior and public subsidies. We study this interaction within Medicare Part D Prescription Drug Plan (PDP) markets. Using a structural model of supply and demand, we find: consumers purchase too few and […]

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