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Title: Trade Protection, Stock-Market Returns, and Welfare

Author(s): Mary Amiti, Sang Hoon Kong and David E. Weinstein

Publication Date: April 2021

Keyword(s):

Programme Area(s): International Trade and Regional Economics

Abstract: We show that the specific factors model can be used to derive a rigorous link between movements in stock prices and productivity, wages, employment, output, and welfare. We also prove that the commonly used measure of the effective rate of protection equals the dual measure of revenue TFP, providing a theoretical foundation for why many studies have found that trade liberalization significantly increases firm-level productivity. Our method enables us to trace a tariff announcement's effect on TFP through its impact on macro variables (e.g., exchange rates) and through its effect on the relative prices of imports. We apply this framework to understanding the implications of the U.S.-China trade war. Our results show that the trade-war announcements caused large declines in U.S. stock prices, expected TFP, and expected inflation largely by moving macro variables, but also by causing declines in the returns of firms trading with China. We find that markets expect the trade war to lower U.S. welfare by 7.8 percentage points, which is much larger than the predictions of static models but in line with those of dynamic models.

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Bibliographic Reference

Amiti, M, Kong, S and Weinstein, D. 2021. 'Trade Protection, Stock-Market Returns, and Welfare'. London, Centre for Economic Policy Research. https://cepr.org/active/publications/discussion_papers/dp.php?dpno=16093