Abstract
The introduction of a VoIP is expected to increase consumer benefits, boost competition in the IT market. This research endeavors to study the optimal access charge for a VoIP, which is expected to be introduced to the Korean IT market. I find that the optimal access charge is higher for the interdependent model than for the independent model; if the demand for the VoIP is a substitution-based relationship, the optimal access charge is higher than the marginal cost. However, if the relationship is complementary, the access charge is lower than the marginal cost in the upstream market.
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