Amartya Sen is Thomas W. Lamont University Professor and Professor of Economics and Philosophy, at Harvard University and was until 2004 the Master of Trinity College, Cambridge. He is also Senior Fellow at the Harvard Society of Fellows. Earlier on he was Professor of Economics at Jadavpur University Calcutta, the Delhi School of Economics, and the London School of Economics, and Drummond Professor of Political Economy at Oxford University. He has served as President of the Econometric Society, the American Economic Association, the Indian Economic Association, and the International Economic Association. He was formerly Honorary President of OXFAM and is now its Honorary Advisor. His research has ranged over social choice theory, economic theory, ethics and political philosophy, welfare economics, theory of measurement, decision theory, development economics, public health, and gender studies. Amartya Sen’s awards include Bharat Ratna (India); Commandeur de la Legion d'Honneur (France); the National Humanities Medal (USA); Ordem do Merito Cientifico (Brazil); Honorary Companion of Honour (UK); Aztec Eagle (Mexico); Edinburgh Medal (UK); the George Marshall Award (USA); the Eisenhauer Medal (USA); and the Nobel Prize in Economics.