Xavier Sala-i-Martin

Xavier X. Sala i Martín (also ''Sala-i-Martin'' in English) is an American economist and professor of economics at Columbia University. Sala i Martin is one of the leading economists in the field of economic growth.

In addition to working at Columbia, he has been a professor at Yale University, Harvard University, and the Universitat Pompeu Fabra in Barcelona and the Barcelona Graduate School of Economics, where he usually visits for a term every summer. Provided by Wikipedia