Extended Abstract: 453 words The work of the 2009 laureate of the Nobel Prize in Economics, Oliver Williamson, on the economic institutions of capitalism – the governance structures of capitalism – has been largely responsible for renewing the debate on the nature and efficiency of firms. Since his 1975 book ‘Markets and Hierarchies, Antitrust and Analysis Implications’, numerous papers have shown the considerable importance of transaction cost economics in many research areas as the nature of the firm, vertical integration or hybrid forms (e.g. Ménard 2005). Nevertheless, one aspect of the global analysis of Williamson’s work has been often ignored in the theoretical debates on the firm, namely the references Williamson makes to organizati...