00286nam a2200109Ia 4500082002100000100001700021245007500038260004400113300000900157500000500166700000500171  a330.164bR127.QT  aRader, Trout  aQuasi-transferable preferences ; a new concept for welfare economicsb  aSt. LouisbWashington Universitycn. d.  a24p.  a  a