When you started to study economics as an undergrad, did you feel that the field of economics actually does a pretty good job of thinking about what is a fair society? No, I didn't. My philosophy is that I try to go after questions that I find interesting and I find novel. It's more satisfactory when you feel at least that you are attempting to go after something new, something big. And often what I think is big and important is motivated by my overall belief about how the economy functions,. What affairs societies and so on.