Why Is “Stigler’s Coase Theorem” Stiglerian? A Methodological Explanation^☆

The Coase theorem is associated with Stigler because Stigler coined the term. The object of this paper is to show that Stigler’s Coase theorem is Stiglerian for deeper – namely, methodological – reasons. We argue that, convinced as he was by the importance of Coase’s message, Stigler also believed that this message – such as presented in “The Federal Communications Commission” (1959) or “The Problem of Social Cost” (1962) – was not scientific. Hence, he had to transform it into a theorem to give it a scientific dimension. This is what we try to show by presenting Stigler’s methodology and by confronting it to the methodology used in Coase’s articles.