As noted in recent reviews (e.g. WTO, 2008, and OECD, 2012) there is no firm answer to this question. Some studies find that trade has not had an impact while others find that it has. Moreover, even if trade were to contribute, it is not clear whether and how this should be remedied since the trade-inequality link can reflect differences in productivities and preferences and thus, as argued recently by Mankiw (2013), can be seen as economically—and from certain viewpoints also socially—acceptable. This seems a particularly important gap to fill since understanding GVCs is central to analysing the causes and consequences of the global division of labour and therefore distribution of income (Brewer, 2011).