David Campbell, Durham University, UK and Robert Lee, Cardiff University, UK Contributors: Ronald H. Coase, Harold Demsetz, G. Calabresi, A.D. Melamed, A. Mitchell Polinsky, Richard A. Epstein, J.E. Krier, S.J. Schwab, R.A. Epstein, David Campbell, J.R. Spencer, Guido Calabresi, J.F. Brenner, Barton H. Thompson Jr, E. Rabin, Robert C. Ellickson, Charles O. Gregory, J.P.S. McLaren, Barrty R. Furrow, Garrett Hardin, S.V. Ciriacy-Wantrup, R.C. Bishop, Carol M. Rose, R. Stavins, B. Whitehead, Richard A. Posner, Goran Skogh, Alan Randall, Mark Sagoff, A. Myrick Freeman, James Buchanan, Gordan Tullock, Carl J. Dahlman, Emery N. Castle, Terry L. Anderson, Donald R. Leal, Bruce A. Ackerman, Richard B. Stewart, Robert W. Hahn, Eric W. Orts, Tom H. Tietenberg.