In our textbook, Modern Principles of Economics, Tyler and I explain the benefits of free trade and show why some common arguments against free trade are mistaken. Our goal, however, is to teach students how to think like economists and so we also explain the costs of free trade. In particular, we indicate the strongest arguments against free trade and explore when those arguments best apply. Here’s one of the better arguments against free trade, straight from the book:
If a good is vital for national security but domestic producers have higher costs than foreign producers, it can make sense for the government to tax imports or subsidize the production of the domestic industry. It may make sense, for example, to support a domestic vaccine industry. In 1918, more than a quarter of the U.S. population got sick with the flu and more than 500,000 died, sometimes within hours of being infected. The young were especially hard-hit and, as a result, life expectancy in the United States dropped by 10 years. No place in the world was safe, as between 2.5% and 5% of the entire world population died from the flu between 1918 and 1920. Producing flu vaccine requires an elaborate process in which robots inject hundreds of millions of eggs with flu viruses. In an ordinary year, there are few problems with buying vaccine produced in another country, but if something like the 1918 flu swept the world again, it would be wise to have significant vaccine production capacity in the United States.
If I may be permitted to advertise a bit (more). In Modern Principles, we explain the concept of externalities using flu shots. In macroeconomics, we deal with both real shocks and demand shocks and we list pandemics as one example of a real shock. We also explain how shocks are amplified and can create dis-coordination. These relevant, real world examples in Modern Principles are not an accident. There are different styles of textbooks. Some are written in a vanilla style so they don’t need to be updated or revised very often. In contrast, we wanted Modern Principles to have modern examples and to be relevant to the times. Sometimes, however, we’d like it to be a little less relevant.