Thomas Piketty's Capital in the Twenty-First Century is the most widely discussed work of economics in recent years. But are its analyses of inequality and economic growth on target? Where should researchers go from there in exploring the ideas Piketty pushed to the forefront of global conversation? A cast of leading economists and other social scientists-including Emmanuel Saez, Branko Milanovic, Laura Tyson, and Michael Spence-tackle these questions in dialogue with Piketty.