Potters, Jos A.M.; Gellekom, Anita van; Reijnierse, Hans - In: Economic Theory 20 (2002) 4, pp. 767-776
In labor market models as well as in exchange economies with indivisible goods gross substitutability is used as a property to guarantee the existence of competitive equilibria. This paper develops an easy way to check gross substitutability for utility functions concerning a finite set of...