Many economics lessons are treated as one-off curiosities, rather than insights into how the world works. I have been frustrated, for example, at the ability of students to recite the definition of opportunity cost accurately, and yet fail utterly to understand its implications. I wrote about this a while back in describinga test question I gave at Dartmouth College when I was teaching there in the 1980s: Suppose you want to go to a concert, but decide not to buy from a scalper because the tickets are too expensive. But then you find some tickets; do you go to the concert?Read Full Article »