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The lens used by the courts and much of the antitrust literature on predatory selling and/or buying is based on partial equilibrium methodology. We demonstrate that such methodology is unreliable for assessments of predatory monopoly or monopsony conduct. In contrast to the typical two-stage dynamic analysis involving a predation period followed by a recoupment period, we advance a general equilibrium analysis that demonstrates the critical role of related industries and markets. Substitutability versus complementarity of both inputs and outputs is critical. With either monopolistic or monopsonistic market power (but not both), neither predatory overselling nor predatory overbuying is profitably sustainable. Two-stage predation/recoupment is profitable only with irreversibility in production and cost functions, unlike typical estimated forms from the production economic literature. However, when the market structure admits both monopolistic and monopsonistic behavior, predatory overbuying can be profitably sustainable while overselling cannot. Useful distinctions are drawn between contract versus non-contract markets for input markets.

Whenever capitalism in the West appears to be dragging with unresolved problems, then quite a few people, including professional economists, begin to think that perhaps socialism is a better alternative. Conversely, in the East even a larger number of people, including economists (who are not activists), seriously believe that in view of their shortages and meagre incomes capitalism would be a better alternative.

The three volumes before us comprise the second title in the “Elgar Reference Collection” of Critical Ideas in Economics, a new series which, we learn from the book cover, aims to provide “an essential reference source for students, researchers and lecturers in economics.” Each volume in the series will bring together a collection of previously-published articles and book-chapters which “focuses on [a] concept widely used in economics,” and will thereby “improve access to important areas of literature which will not be available in the archives of many of the newer libraries.” No one can deny that Professor Walker’s topic is ideally suited to this stated intent; is there a concept more “widely used in economics” than that of equilibrium? A collection of previously-published items cannot, of course, be appraised in terms of the originality of its content. Such a work offers a different sort of contribution. In addition to the publisher’s stated aim of an improved access to those key articles which, either because of their age or the location of their publication, are not widely available, a work such as this can perform a function not unlike that which Weintraub (1991, pp. 129–130) ascribes to the survey article. The act of selection (and, hence, of exclusion) serves to delineate the field for the non-specialist, and the ordering of the items in the collection can reveal instructive lines of intellectual development – a “filiation of scientific ideas” to adopt Schumpeter’s (1954, p. 6) felicitous phrase – that otherwise might be obscured.