Four papers consider competition, new technology and economics of local telephone companies in a deregulated environment: (1) "An Engineering and Policy Analysis of Fiber Introduction into the Residential Subscriber Loop" (Marvin Sirbu, Frank Ferrante, and David Reed); (2) "Competition in the Local Loop: Pricing Carrier Access" (Steve G. Parsons); (3) Default Capacity Tariffs: Smoothing the Transitional Regulatory Asymmetrics in the Telecommunications Marketplace" (Dennis Weisman) (abstract only); and (4) "The Economics of Bypass in a Simple Model of the Telephone Network" (Glenn A. Woroch). The first paper is supplemented by 14 figures and 46 references, and the fourth paper includes a stylized model and six references. (EW)