An expanded model of value in cooperative games is presented in which value has either a linear or a proportional mode … (1989, 1992) value have a linear mode and an input basis. The egalitarian value (Kalai and Samet (1985)) has a linear mode …

In this paper I intend to model a firm decision of entrance into a profitable fashion market where fashion results from … fashion market and that ii) when incumbent firm accommodates the other firm a la Cournot there is no pure strategy Nash … equilibrium. The properties of the model seem to be in accordance with the persistence in time of fashion brands. …