first show that local network externalities, in contrast to global network externalities, do not sharpen competition. Then …Local network externalities are present when the network externalities associated with entering a certain network … the consequences of local network externalities within a framework where two networks compete on the Hotelling circle. We …

I show that lobbying generates negative externalities, which affect non-lobbying companies. When a piece of new …

heterogeneity in competition is easily measured. I develop and estimate a matching model with externalities, where the value of a …. Competition is allowed to affect labor productivity, so that heterogeneity in competition affects the demand for skilled labor … match between a player and team depends on the entire allocation of matches. The results show that competition has a …

selection. Building on their framework we demonstrate that externalities between agents - an agent's utility upon accepting a … when the size of the externalities is arbitrarily small. Our result highlights the degree of control a principal has over … on existing theories of competition in markets with adverse selection …