⁶In part due to data availability our analysis focuses on the period before the crisis, when there was some catching-up between regions. An interesting extension of our paper would be an examination of a regional migration response to the most-recent crisis. One important impact of the crisis for instance, has been a mean increase in the levels of inequality within regions, but with wide dispersion across regions – with some of them actually experiencing decreases in inequality (see Castells-Quintana et al. 2015). Analysing the role for migration decisions of this differential impact of the crisis in terms of inequality could prove to be of high relevance.