The paper shows that Bertrand competition and contestability can be reconciled with sunk costs. When average total costs are constant over a range of output, marginal cost pricing does not conflict with the budget constraint faced by firms. Empirical observations support the notion of constant...

Describes how mathematics enjoyed a virtual monopoly as the privileged method of economic inquiry in the post-war period. Counters the argument that such a position generates negative consequences, such as monopoly rents and the abuse of dominant positions. Argues that competing schools of...