@book {18063, title = {Collective Choice and Social Welfare}, year = {1970}, note = {Edinburgh: Oliver and Boyd, 197l; Amsterdam: North-Holland, 1979. Swedish translation: Bokforlaget Thales, 1988. }, publisher = {Holden Day}, organization = {Holden Day}, address = {San Francisco}, url = {http://www.amazon.com/Collective-Choice-Social-Welfare-K/dp/0444851275}, author = {Amartya Sen} }