“…Since, in our work, we do not investigate the determinants of firms' boundaries, we depart from the global sourcing literature that focuses on the determinants of firms' offshoring modes (i.e. the "make or buy" decision: vertical integration vs. outsourcing to a foreign country) and looks in particular at either the role of international property rights protection in the destination countries (Glass and Wu, 2007) or the technological content of the goods (Acemoglu et al, 2010), or both (Naghavi et al, 2015). Nevertheless, our model is related to these papers, because it focuses on what we call the "innovation boundaries," and we deal with the issue of which of the two partners adapts the intermediate good.…”