Thomas Piketty is Professor at EHESS and at the Paris School of Economics. He is the author of numerous articles published in journals such as the Quarterly Journal of Economics, the Journal of Political Economy, the American Economic Review, the Review of Economic Studies, Econometrica, Explorations in Economic History, Annales: Histoire, Sciences Sociales, and of a dozen books. He has done major historical and theoretical work on the interplay between economic development and the distribution of income and wealth. In particular, he is the initiator of the recent literature on the long run evolution of top income shares in national income (now available in the World Wealth and Income Database). These works have led to radically question the optimistic relationship between development and inequality posited by Kuznets, and to emphasize the role of political, social and fiscal institutions in the historical evolution of income and wealth distribution. He is also the author of the international best-seller Capital in the 21st century.