What Happened to Kapp’s Theory of Social Costs? A Case of Metatheoretical Dispute and Dissent in Economics

In the early 1970s Wilfred Beckerman and K. William Kapp engaged in a serious dispute. Although it focused on social costs, the dispute raised issues about the very foundations of economics. The differences in approach to social costs that this dispute exposed were so deep-rooted as to preclude (or at least hinder) any possibility of constructive dialogue. This article argues that the subsequent ‘conspiracy of silence’ against Kapp should be understood in terms of Kapp’s very different conception of economics as a social science. This issue is relevant to a broader discussion about the boundaries of pluralism in economics—how these boundaries are drawn and the conditions for a constructive dialogue among economists and with other social scientists