NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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Paul Novosad

Economics Department
Dartmouth College
6106 Rockefeller Center
Room 301
Hanover, NH 03755

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Institutional Affiliation: Dartmouth College

NBER Working Papers and Publications

March 2020Comparing Intergenerational Educational Mobility for Minorities Around the World
with Sam Asher, Charlie Rafkin
in Measuring and Understanding the Distribution and Intra/Inter-Generational Mobility of Income and Wealth, Raj Chetty, John N. Friedman, Janet C. Gornick, Barry Johnson, and Arthur Kennickell, editors
December 2016Classification Trees for Heterogeneous Moment-Based Models
with Sam Asher, Denis Nekipelov, Stephen P. Ryan: w22976
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 into disjoint subsets and fits a set of moments within each subspace. We prove the consistency of this estimator and show standard rates of convergence apply post-model selection. Monte Carlo evidence demonstrates the excellent small sample performance and faster-than-parametric convergence rates of the model selection step in two common empirical contexts. Finally, we showcase the usefulness of our approach by estimating heterogeneous treatment effects in a regression discontinuity design in a development sett...
 
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