About the Book: In You Can’t Do That, Nobel Prize-winning economist Alvin Roth explores how society decides which transactions should be allowed, regulated, or prohibited. Examining controversial issues such as organ donation, assisted dying, drug legalization, reproductive choices, and data privacy, he introduces the concept of “repugnant markets” to explain why certain exchanges provoke strong moral objections. Rather than offering simple answers, Roth presents a thoughtful framework for balancing individual freedom, social welfare, and ethical responsibility. Combining economic theory with real-world examples, the book encourages readers to think critically about difficult public policy questions and the complex trade-offs involved in shaping fair and effective societies.