We are excluding some insight into economic behavior if we don't think more about the way people interact influence each other. Andi be curious to hear your reaction to it. We're going to talk about, what's progress? What do we really deeply care about? It seems to me a lot of things that i get satisfaction from are not simple things like potatoes and shirts in a night at the opera,. But those kind of goods that we think of that go into one's utility function.