that these two types of externalities co-exist, but differ in their spatial distribution and attenuation within cities …-city industry cluster in a diversified, large city appears to let firms enjoy the benefits of local industry-specific externalities …

This paper analyzes the impact of network externalities on R&D competition between an incumbent and a potential entrant … the presence of network externalities. By choosing compatible network goods, firms do not necessarily reduce the R …

shown that network externalities positively affect the incentives to invest in R&D. In the model, competition resembles a …. Moreover, network externalities have an important impact in the dynamic evolution of the industry. Although in the long-run a …-and-neck technological configurations. This short-run competition is fiercer and longer, the higher the level of network externalities …