Reallocating spectrum that is being underutilized would encourage the deployment of wireless services and could help to make such services more competitive with wireline offerings. First, an increase in the amount of spectrum that firms could devote to broadband would lower the cost of providing wireless broadband services and encourage entry. Second, more spectrum would allow providers to increase the capacity and reliability of their offerings, thereby bringing them closer to cable modem and fiber-based broadband. Third, the increased capacity in the systems would help support new applications. We urge the Commission to give priority to making more spectrum available to wireless broadband providers so as to maximize their potential to compete against the established wireline ones.As these quotes suggest, the unthinking, knee-jerk rejection of any proposed combination as an antitrust violation has little to do with the reality of how the FCC and Department of Justice should--and usually does--review proposed mergers. There is no magic formula for deciding what percentage of a relevant market an individual competitor is permitted to control. Defining the market itself is complicated, especially given different conditions in different parts of the U.S. and the potential for mobile service to compete with wireline alternatives. The influence a company has over price is affected by other factors besides direct competition, including potential substitutes and regulatory constraints.