Are network externalities a new source of market failure?, S.J. Liebowitz and Stephen E. Margolis; a selective survey of the literature on indirect network externalities - a discussion of Liebowitz and Margolis, Neil Gandal; defending the concept of network externalities - a discussion of Liebowitz and Margolis, Pierre Regibeau; reply to comments by Regibeau and Gandal, S.J. Liebowitz and Stephen E. Margolis; public use, just compensation, and land reform in Hawaii, Sumner J. La Croix and Louis A. Rose; how to value a lost opportunity - defining and measuring damages from market foreclosure, William B. Tye, Stephen H. Kalos and A. Lawrence Kolbe; mergers analysis with collective capacity - a suggested approach, Duncan Cameron and David Reiffen; after preliminary relief in merger cases is denied, what then?, John E. Lopatka and James F. Mongoven; the endowment effect and income transfers, Christopher Curran and Paul H. Rubin; an economic analysis of performance rights - some implications of the Copyright Act of 1976, Bruce H. Kobayashi and Ben T. Yu.