The aim of this Research Note is to show a methodology that will allow us to analyze the socio-economical evolution of a region as a case-study, and from thereon to make a quantitative evaluation of the benefits or prejudices derived from the policies previously adapted. The empirical work consists of an empirical analysis of conglomerates regarding a selection of variables related to the development of 105 mining municipalities bordering the provinces of Leon and Palencia between 2007 and 2014. The results demonstrate that, in effect, the impact derived from the economic crisis was very important, especially when it comes to employment.