Regional differences in real wages have been shown to be both large and persistent in the U.S. and the U.K., as well as in the economies of other countries. Empirical evidence suggests that wage differentials adjusted for the cost of living cannot only be explained by the unequal spatial distribution of characteristics determining earnings. Rather, average wage gap decomposition reveals the important contribution made by regional heterogeneity in the price assigned to these characteristics. This paper proposes a method for assessing regional disparities in the entire wage distribution and for decomposing the effect of differences across regions in the endowments and prices of the characteristics. The hypothesis forwarded is that the results from previous studies obtained by comparing average regional wages may be partial and nonrobust. Empirical evidence from a matched employer-employee dataset for Spain confirms marked differences in wage distributions between regions, which do not result from worker and firm characteristics but from the increasing role of regional differences in the return to human capital. .

Regional disparities in unemployment rates are large and persistent. The literature provides evidence of their magnitude as well as of the role of certain factors in explaining the unemployment gap between regions. Most of these studies, however, adopt an aggregate approach and so do not account for the individual characteristics in each region. This paper, by drawing on micro‐data from the Spanish wave of the Labour Force Survey, seeks to remedy this shortcoming. An appropriate decomposition of the regional gap in the average probability of being unemployed enables us to distinguish between the contribution of differences in the regional distribution of individual characteristics from that attributable to a different impact of these characteristics.

This paper investigates the role of regional factors in innovation performance, controlling for firms' absorptive capacity and other sources of firm heterogeneity. The findings for a sample of firms in Spain support the hypothesis that regional determinants matter, though their role is subtler than is frequently assumed. Rather than exerting a direct influence on firms' innovation, the regional context moderates the effect of internal determinants, particularly of the firms' absorptive capacity. The results indicate that the type of relevant interactions differs for product and process innovation and that they only operate for SMEs, being negligible for large firms.