%0 Journal Article
%T When to Control for Covariates? Panel Asymptotics for Estimates of Treatment Effects
%A Angrist, Joshua
%A Hahn, Jinyong
%J The Review of Economics and Statistics
%V 86
%N 1
%P 58-72
%@ 0034-6535
%D 2004-02-01
%I MIT Press
%~ DeepDyve