Myron Northrop Professor of Economics
Interim Senior Associate Dean of Doctoral Programs (2022-23)
Olin Business School
Washington University in St. Louis
Campus Box 1133
One Brookings Drive
St. Louis, MO 63130
email: stephen.p.ryan(at)

New Version of Part D Paper Posted

New Version of Part D Paper Posted

After a two-year revision, we have posted a new version of our paper, “Subsidy Design in Privately-Provided Social Insurance: Evidence from Medicare Part D.” This paper was formerly titled “The Welfare Effects of Supply-Side Regulations in Medicare Part D.” The two major changes in this version are the use of microdata and the inclusion of […]
New Version of Moment Forests posted

New Version of Moment Forests posted

Please find a new version of my paper, “Moment Forests” (formerly “Classification Trees for Heterogeneous Moment-Based Models”), joint with Sam Asher, Denis Nekipelov, and Paul Novosad, located here: Moment Forests. We have submitted the paper for review.

Pakistani Schooling Project Working Paper Posted

A new working paper is up: “Delivering Education to the Underserved through a Public-Private Partnership Program in Pakistan.” [PDF] Abstract: This study experimentally evaluates the short-term impacts of public per-student subsidies to partnering local entrepreneurs to establish and operate tuition-free, coeducational, private primary schools in educationally underserved villages in Sindh province, Pakistan. Two subsidy structures […]