NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH
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The Welfare Effects of Social Media

Hunt Allcott, Luca Braghieri, Sarah Eichmeyer, Matthew Gentzkow

NBER Working Paper No. 25514
Issued in January 2019, Revised in November 2019

---- Acknowledgments ----

We thank Nancy Baym, Moira Burke, Annie Franco, Alex Leavitt, Todd Rogers, Joel Waldfogel, and seminar participants at Berkeley, Centro de Investigación y Docencia Económicas, Chicago, Columbia, Instituto Tecnológico Autónomo de México, Microsoft, NBER Digitization, NYU, Stanford, the Technology Policy Institute, UCLA, UC Santa Cruz, and University of Washington for helpful comments. We thank Raj Bhargava, Zong Huang, and Kelly B. Wagman for exceptional research assistance. We are grateful to the Sloan Foundation and the Knight Foundation for generous support. The study was approved by Institutional Review Boards at Stanford (eProtocol #45403) and NYU (IRB-FY2018-2139). This RCT was registered in the American Economic Association Registry for randomized control trials under trial number AEARCTR-0003409. Replication files and survey instruments are available from https://sites.google.com/site/allcott/research. Disclosures: Allcott is a paid employee of Microsoft Research. Gentzkow does paid consulting work for Amazon and is a member of the Toulouse Network for Information Technology, a research group funded by Microsoft. Braghieri and Eichmeyer have no relevant or material disclosures. The views expressed herein are those of the authors and do not necessarily reflect the views of the National Bureau of Economic Research.

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