Working paper: "From Pretrend Tests to Preperiod Selection in Difference-in-Differences"
Working paper: "Linearized GMM Estimator"
Associate Professor
Department of Economics
Toronto Metropolitan University
(Formerly known as Ryerson University)
Email: doosoo@torontomu.ca
Phone: 416-979-5000, ext. 554797
Address: 350 Victoria St., Toronto, ON M5B 2K3, Canada