Younger consumers’ drinking habits have been the focus of much attention over the past few years. Statistics have painted a broad picture of an alcohol industry in crisis, driven in part by a declining interest in liquor among the Gen Z cohort. Though the numbers don’t always add up (do they ever?), the prevailing hypothesis is that the 18 to 34 crowd is trading alcohol for cannabis, screen time and a bevvy of wellness-oriented goals.On a recent episode of “Armchair Expert with Dax Shepard,” economist Alvin E. Roth chimed in with some insight. A Nobel Prize-winner, Stanford professor and author...