VI* ____, 1938, "Interpersonal Comparisons of Utility: A Comment," "Economic Journal", 43(4), 635–41* Amartya K. Sen, 1970 "Collective Choice and Social Welfare".
VI* ____, 1938, "Interpersonal Comparisons of Utility: A Comment," "Economic Journal", 43(4), 635–41*Amartya K. Sen, 1970 "Collective Choice and Social Welfare".