Contributors: C. Belfield, W.K. Bellinger, A. Brooks Bowden, G. Catalano, C. Dockins, S.E. Dudley, S. Farrow, M. Florio, D. Greenberg, C. Griffiths, A.C. Harberger, P.-O. Johansson, B. Kristrom, K. Krutilla, H.M. Levin, J. Mendeloff, C. Pancotti, E. Quinet, L.A. Robinson, D. Salkever, S. Shapiro, N. Treich, D. Weimer, R.O. Zerbe