The Telecommunications Act of 1996 requires incumbent monopoly phone companies to lease elements of their networks to rivals. An important policy question is whether these unbundled elements are substitutes for entry modes that are more facilities-based. In this article, we estimate demand...

In this paper, we offer a hybrid approach to merger simulation in which we allow rather extensive pre-testing to suggest the 'correct', or most desirable, form for the underlying demand curves. Our application is the merger between the large mobile telephone companies Cingular and AT&T Wireless...