Previous research has argued that, in the mature phase of competition, telecommunications networks may use access charges as an instrument of collusion. We show that this result depends totally on the assumption of linear pricing. Though under nonlinear pricing, the access charge alters the way...

We show how differences in demand and unbalanced call flows affect considerably the pricing strategies of competing telecommunications networks and this both for competition in linear and nonlinear pricing. Differences in demand give also scope for targeted entry. If networks are close...