We shall also concern ourselves with the institutional order built up from transactions, but our focus will be less narrowly economic than the one adopted by Williamson. Like him, we shall argue that institutional structures aim partly at achieving transactional efficiencies and that where such efficiencies are effectively achieved they act somewhat like a magnetic field – a mathematician would call them ‘attractors' – drawing the uncommitted transaction into a given institutional orbit. Yet in contrast to Williamson's, our concept of transactions is underpinned by an explicit rather than an implicit theory of information production and exchange which yields a different way of classifying them as well as a distinctive approach to their governance. We find ourselves in consequence in the realm of political economy rather than of economics tout court.