If you experience any technical difficulties with this video or would like to make an accessibility-related request, please send a message to [email protected]. Amartya Sen received the 1998 Nobel Memorial Prize in Economic Sciences for his work on welfare economics. In addition to being the Thomas W. Lamont University Professor at Harvard University, he is also a fellow of Trinity College at the University of Cambridge.Amartya Sen's books have been translated into more than thirty languages. Professor Sen, widely considered a ground-breaker among late twentieth-century economists for his insistence on discussing issues seen as marginal by most economists, mounted one of the few major challenges to the economic model that posited self-interest as the prime motivating factor of human activity. His most recent book, The Idea of Justice (London: Allen Lane, 2009), has been described by The Economist as "commanding summation of Mr. Sen's own work on economic reasoning and on the elements and measurement of human well-being.