The U.S. tends to export high-tech goods because we have strong comparative advantage there, and we tend to import labor-intensive and less skill-intensive goods that other countries can do more cheaply.

Here's a startling fact: in the 45 years since the introduction of the automated teller machine, those vending machines that dispense cash, the number of human bank tellers employed in the United States has roughly doubled, from about a quarter of a million to a half a million.

People tend to think about trade as if it's competition between companies - if Apple wins, Google loses. But that's false. Trade makes nations better off in general. Now, I want to be clear. I'm not saying that everything about trade is good and beneficial. Trade also has costs.

David Autor Quotes