The theory of economic growth covers institutional market and company internal factors that explain the disparities in well-being among countries, in a given period. It also questions welfare growth dynamics that leads to convergence or divergence of per capita wealth levels. (Solow, 1956-1957;...

In the academic year of 2004-2005 the Spanish region of Madrid began to implement a bilingual educational programme in public schools. Currently, 45% of the public educational system (primary and secondary) participates in the bilingual programme of the Community of Madrid (hereinafter MBP). One...