The analysis of the evolution of the location of economic activity in Portugal between 1890 and 1980 depicts a strong concentration of productive activity in the coastal regions. We estimate data for regional GDP per capita, which show that the evolution of regional inequality followed an inverted U-curve, in line with that observed in other regions of Europe, but with a rather late peak, in 1970. The reasons for this behaviour may be found in the limits to industrialisation in the interior regions and the benefits generated by the agglomeration economies in the more developed coastal regions.

The degree of development of Spanish agriculture at the end of the XIX century and the beginning of XX is a controversial issue. In this respect the study of the integration of the domestic market could provide new evidence since the degree of the market integration can be considered an indicator of economic development. By using regional wheat prices this paper analyzes the Spanish market integration between 1891 and 1905. With this aim in mind we employ the usual cointegration approach as well as an alternative method based on spectral analysis that allows taking into consideration the existence of no synchronized cycles.