Amartya Sen

Amartya Kumar Sen is an Indian economist and philosopher best known for his extensive work on welfare economics, development economics and the poorest sectors of society, addressing the problems of poverty and famine. Sen is currently the Professor of Economics and Philosophy at Harvard University. https://scholar.harvard.edu/sen/home
A Nobel Memorial Prize laurate in Economics, Sen is generally considered one of the most influential living economists.http://www.superscholar.org/features/20-most-influential-living-economists/ He is known as an economist close to social-liberalism. He also helped the United Nations develop their well-known Human Development Index.
==Sen and democracy==
Amartya Sen is known for his vocal advocacy of democratic government and human rights, as well as his work in economics. In one of his books, Development as Freedom, he makes the assertion that "no famine has ever taken place in the history of the world in a functioning democracy. He is careful, however, to draw a distinction between the "food crisis" and the more severe "famine," maintaining that food crises can still occur in democracies. Sen argues that famines cannot occur under democracy due to the incentive to win elections, which means politicians have to ensure that as many potential voters as possible get food, which has the consequence of averting such disasters.http://www.wehaitians.com/does%20democracy%20avert%20famine.html Nevertheless, in his 2010 book, The Idea of Justice, Sen argues that "the protective power of democracy in providing security is, in fact, much more extensive than famine prevention," through giving rulers the incentive to "act supportively" towards their populations.Sen, A. The Idea of Justice, 349 Sen believes that freedom is crucial at all stages of development, and is thus a primary means of development.Han and Thornton Development without freedom: the politics of Asian globalization, 10
==Liberal paradox==
In Collective Choice and Social Welfare, Sen devised a logical paradox, known as the liberal paradox, which builds upon the previously existing "Arrow's Impossibility Theorem." The example given by Sen is that there is a book on sale (Lady Chatterly's Lover) and two potential consumers have different views of reading it. Person 1 prefers that no one should read it (option z), but would prefer himself to read it (option x) to the alternative of Person 2 reading it (option y). His order of preference is thus zxy. Person 2, by contrast would prefer either of them to read it over no one reading it (option z). 
In fact, person 1 reading it (option x) is his first preference. That he should read it himself (option y) is his second preference. His 'ranking' is thus xyz.
'Minimal Liberalism', i.e. the ability to order of choices, requires that Person 1 be required not to read the book, ruling out option x. It also requires that Person 2 not be prevented from reading the book. This leaves Person 2 reading the book (option y) as the only alternative. However, option y violates the as both option x would have been preferred by everyone in the group.
This is one of the more politically contentious points of Sen's work, as it directly contradicts the libertarian notion that free market mechanisms are enough to produce a Pareto optimal society. However, a number of ways out of the paradox have been proposed.
==References==
Category:Economists
Category:Living people
Category:Social liberalism