We investigate the existence and implications of competitive equilibria when two firms offer the same electronic goods under different pricing policies. One charges a fixed subscription fee per period; the other charges on a per-use basis. Two models are examined when firms' marginal costs are...

We consider exchange economies with a measure space of agents and for which the commodity space is a separable and reflexive Banach lattice. Under assumptions imposing uniform bounds on marginal rates of substitution, positive results on core-Walras equivalence were established in...

We build a finite horizon model with inside and outside money, in which interest rates, price levels and commodity allocations are determinate, even though asset markets are incomplete and asset deliveries are purely nominal. Copyright Springer-Verlag Berlin/Heidelberg 2006