Sure, markets work well in general. But for some transactions — like school admissions and organ transplants — money alone can’t solve the problem. That’s when you need a market-design wizard like Al Roth. Plus: We hear from a listener who, inspired by this episode, made a remarkable decision.

The world’s great museums are full of art and artifacts that were plundered during an era when plunder was the norm. Now there’s a push to return these works to their rightful owners. Sounds simple, right? It's not. (Part 2 of “Stealing Art Is Easy. Giving It Back Is Hard.”)