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MIT RES.14-004 Seven Questions About Tariffs That Everyone Should Know the Answer To, IAP 2026

MIT OpenCourseWare

EducationScience

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About

Instructor: Arnaud Costinot

View the complete course: https://ocw.mit.edu/courses/res-14-004-seven-questions-about-tariffs-that-everyone-should-know-the-answer-to-january-iap-2026

YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP62goyD7uXpkLCLMiYAwu83q

It is hard to predict what US tariffs will look like in a few months, or even in a few weeks from now. But there are many questions about tariffs that can be answered through a combination of theory and data. This lecture discusses seven that everyone should know the answers to.

Question #1: What Is (Always) Bad About Tariffs? (05:16)

Question #2: What is (Potentially) Good About Tariffs? (13:22)

Question #3: Should a Country (Sometimes) Use Tariffs? (28:15)

Question #4: How Do We Know Whether (a Particular Set of) Tariffs Are Good or Bad? (43:08)

Question #5: What Was the Impact of the 2018–2019 Trade War? (46:59)

Question #6: Are Global Tariffs Unfair to the United States? (56:56)

Question #7: What Is (Really) Bad about Trade Wars? (1:02:27)

License: Creative Commons BY-NC-SA

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