The group that would benefit from a protective tariff on US-produced economics books would be US Book manufacturers.
A protective tariff is a tax imposed on imported goods to make them more expensive, thereby encouraging consumers to buy domestically produced products instead. In this case, if a tariff were applied to imported economics books, it would likely lead to increased sales for US book manufacturers as their products would become relatively cheaper compared to imported options.
French economics teachers and US economics teachers would not benefit directly from a protective tariff on US-produced books, as they may rely on a variety of resources, including imported books.