Summary: <br> <br> <br> <br> <br> <br> <br> We now consider some remaining topics in the theory of tariffs and trade, in particular relating to how trade interacts with the business firm. How is it that so much trade takes place inside of firms? How is the prospect of global trade reshaping how production is distributed across the globe? And finally, how do tariffs shape industrialization and what do economists know about industrial policy?<br>
