An Essay on Price Discrimination, The Economics of Imperfect Competition and Employment: Joan Robinson and Beyond, edited by George Feiwel, New York: MacMillan and New York: New York University Press, 1989, 365-86.
- Reprinted in Deregulating Telecommunications: The Baby Bells’ Case for Competition, R.S. Higgins and P.H. Rubin, eds. Chichester: John Wiley & Sons, 1995, 151‑162.