Smooth equilibrium analysis with price-dependent preferences

With the exception of existence, not much seems to be known of economies where individual preferences are affected by prices. We show that the main properties of competitive equilibria that fall under the general heading of qualitative comparative statics remain true when preferences are price dependent, provided that the total resources are allowed to vary in the parameter space. The equilibrium set is a smooth manifold diffeomorphic to a Euclidean space; the natural projection is a smooth proper map, with topological degree one; equilibria always exist, and are locally unique for an open and dense set of economies. JEL Classification numbers: D51, D52.