prices and advertising tariffs. We build on the work of Gabszewicz, Laussel and Sonnac (2001, 2002), whose model we take as …), cover prices are positive and the minimal differentiation outcome does not depend on the size of the advertising market. We … to cooperate in setting cover prices and advertising tariffs but not the editorial line …

We estimate a dynamic oligopoly entry game in the early U.S. local telephone market. We observe the identities of … potential entrants into local markets and therefore the waiting time of each potential entrant before it commits actual entry …. We find that firm-level heterogeneity in entry costs plays a significant role in determining a firm's entry behavior into …