The results of some recent studies suggests that organization capital – what firms knows about their assets and how they can best be used – could be a source of productivity spillovers. The recent paper by Wen Chen and Robert Inklaar, forthcoming in the Journal of Productivity Analysis, finds no evidence for such spillovers using detailed firm-level data and information about potentially useful organization capital of other firms. So while organization capital can be useful to distinguish as a capital input, the social returns to investment in organization capital do not exceed the private returns.