²The used model draws on the methodological contribution developed in Ramajo et al. (2017). The MultiREG-SpVAR model extends the traditional VAR models applied in the economics literature (see Kamps 2005) to assess the effects of public capital at aggregate national level. Thus, the proposed approach encompasses both the VAR methodology, that specifies the single-region temporal dynamics (see Márquez et al. 2011), the bi-regional VAR approach (see Márquez et al. 2010a), and the uni-regional Spatial VAR approach (Márquez et al. 2015), combining different region-specific VAR models in a global specification in which the state variables of each region are related to the state variables of the rest of the regions.