ACKNOWLEDGMENTS
We are grateful to Gordon Dahl, Matthew Gentzkow, Magne Mogstad, Ben Olken, Jesse Shapiro, and
David Stromberg for comments on the draft. We thank Benedetta Brioschi, Yizhuang Alden Cheng, Brian
Wheaton, Martina Zanella, Jeffrey Zeidel, and Michael Zhang for excellent research assistance.
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