Xavier Sala-i-Martin was educated at the Universitat Autònoma de Barcelona, and Harvard University. He taught at Yale (1990–96), and Columbia (1996–to date) where he is currently Professor of Economics. He was a Visiting Professor at Barcelona’s Universitat Pompeu Fabra (1994–2005) and Visiting Professor at Harvard University in 2003–04. Among his many professional activities, Professor Sala-i-Martin has been a consultant to the IMF and World Bank (since 1993), and Senior Economic Advisor to the World Economic Forum (since 2002). In 2002, he founded the Umbele Foundation: A Future for Africa. He is the co-author, with Robert Barro, of the leading graduate textbook Economic Growth (2003), and is Associate Editor of the Journal of Economic Growth.