Amartya Sen is Lamont University Professor Emeritus, Harvard University and formerly Master of Trinity College, Cambridge. Professor Sen was born in 1933 in India and was educated at Presidency College, Calcutta and Trinity College, Cambridge. His research has included work on social choice theory and welfare economics (for which he was awarded the Nobel Prize in Economics in 1998), as well as development economics, causation of famines, theory of measurement, and moral and political philosophy. He is a Past President of the Econometric Society, the International Economic Association, the Indian Economic Association, and the American Economic Association. His publications include Choice, Welfare and Measurement; Resources, Values and Development; Inequality Reexamined; and Development as Freedom.