It's a bit weird to think of dating or marriage as a market — but this is a newsletter that tries to make sense of the world through economics. And, like any market, shifts in supply and demand can reshape romantic outcomes in pretty profound ways. First, a dating story that illustrates this dynamic. Then we'll get to a fascinating new study that may help explain why getting married has become harder for many American women. But first, the story. If you haven't heard of him, Jack Antonoff is a musician and super-producer. He, for example, produced a slew of...