I like the idea of living in a city - any city, especially a strange one - like the thought of traffic and crowds, of working in a bookstore, waiting tables in a coffee shop, who knew what kind of odd, solitary life I might slip into? Meals alone, waling the dogs in the evenings; and nobody knowing who I was.

A lot of things that we cannot buy and sell in markets used to be totally legal objects of market exchange - human beings when we had slavery, child labour, human organs, and so on. So there is no economic theory that actually says that you shouldn't have slavery or child labour because all these are political, ethical judgments.