As just about any observer of the American political scene over the past thirty years can attest, traditional modes of economic regulation by administrative agencies fell sharply out of favor in the United States in the quarter century after 1975. In areas as various as transportation, workplace safety, the envi—ronment, banking, and labor standards, skepticism about regulatory agen—cies became a dominant premise of policy debates. The assumptions and precepts of public choice scholarship, so carefully laid out by Iessica Leight in her contribution to this volume, filtered into the conceptual assumptions of elected officials and leading political commentators alike. Politicians and governmental officials increasingly worried about the “capture” of public agencies by private interests, leading to the latter’s unjust enrichment; they grew ever more disquieted by the possibility that regulatory action would produce unanticipated outcomes that would harm economic growth; they feared that the enduring shortcomings of government—venal officialdom and tangled bureaucracy—would hamstring regulatory responses to even substantial socioeconomic problems. Although the critiques of the regulatory state emanated most consistently from political conservatives and libertarians, as well as business groups that viewed particular regulatory regimes as antithetical to their interests, they significantly shaped the worldview of many moderates and liberals as well.