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School Mask Mandates and COVID-19: The Challenge of Using Difference-in-Differences Analysis of Observational Data to

Ambarish Chandra1, Tracy Beth Høeg2, Shamez Ladhani3

  • 1Department of Management, University of Toronto Scarborough, and Rotman School of Management, University of Toronto, Toronto, Ontario, Canada (A.C.).

Annals of Internal Medicine
|October 7, 2024
PubMed
Abstract

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