Product Substitutability and Competition in Long-Distance Telecommunications

Michael Ward ()

Economic Inquiry, 1999, vol. 37, issue 4, 657-77

Abstract: I estimate the degree of substitutability between U.S. long-distance telecommunications carriers. AT&T's Marshallian demand elasticity for basic long-distance service is estimated to be about -10. With various assumptions regarding producer behavior, a range of residual demand elasticities, price-cost margins, and the dead-weight losses are calculated. I argue that producer behavior is such that the dead-weight loss to supracompetitive pricing is likely to be about 1.5% of industry revenues. The results bear on whether AT&T's deregulation was merited and whether to allow the Bell Operating Companies to enter the long-distance market. Copyright 1999 by Oxford University Press.

Date: 1999
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