For an even number of firms with identical transport cost, spatial Cournot competition in a circular city generates a continuum of equilibria. We establish that any transport cost differential between the firms, however small, may eliminate all the equilibria, except the partial agglomeration...

This note examines firm locations in a delivered pricing model with positive production externalities. We find that, quite counter intuitively, firms will disperse rather than move closer, when production externalities are positive and reciprocal. Furthermore, we see a divergence between the...

The paper analyzes spatial competition among firms that sell substitute and/or complementary products. The firms first choose locations on the perimeter of a circular city and then compete in quantities (à la Cournot). Both linear and convex (quadratic) transport costs are considered. In...