We discuss the effects of strategic commitments and of network size in the process of setting interconnection fees across competing networks. We also discuss the importance of the principles of reciprocity and imputation of interconnection charges on market equilibria.
Reciprocity means that both networks charge the same for interconnection.
Imputation means that a network charges its customers as much as it charges customers of the other network for the same service. Assuming that each consumer cannot subscribe to more than one network, we begin by analyzing a game of strategic symmetry where the two networks choose all prices simultaneously. Second, we allow a dominant network to set the interconnection fee before the opponent network can set its prices. This results in a price-squeeze on the rival network. Third, we show that the imposition of the reciprocity rule eliminates the strategic power of the first mover.