<title>Abstract</title> The economic literature is giving new attention to Lionel Robbins' main contributions to economic theory, confined for several decades to the <italic>Essay</italic>, systematically misunderstood as the manifesto of the epistemology of neoclassical economics, where its underlying ontology characterized...

<title>Abstract</title> In <italic>The Economics of Welfare</italic>, Pigou develops the idea of what will be widely known as ‘Pigouvian tax’. Together with the concept of externality, they constituted two of the most important founding elements of modern welfare economics. Many have suggested that, on the way he treated...