Summary: Steven Durlauf, is the Kenneth Arrow professor of Economics at the university of Wisconsin. He's an expert on growth theory, co-editor of the prestigious North Holland handbook series volume on economic growth and has a c.v. that weighs twenty pounds when printed out. He recently participated in a panel discussion with Thomas Piketty, Paul Krugman and Joseph Stiglitz: We talk about the principles that underlie Piketty's argument, and the implications for public policy regarding economic growth.