Dworkin's contributions clarify and sharpen the idea of luck egalitarianism just described and move the idea in a particular direction. Suppose we ask, what fixes whether a distribution of benefits or opportunities across people is equal? Dworkin urges that a distribution is equal just in case people have equal resources to pursue whatever aims and ambitions they might have. A distribution of material resources across persons can be regarded as equal when no one would prefer to have any one else's bundle. A hypothetical implementation of this idea would involve imagining people assigned equal bidding resources and holding an auction to distribute the material resources at hand, with the auction concluded only when no one wishes to change her bid for any bit of the stuff being divided by auction. 