Madrid concentrates activities directly connected with power (central and regional government, headquarters of Spanish companies, regional HQ of multinationals, financial institutions) and with knowledge and technological innovation (research centres and universities). It is one of Europe's largest financial centres, and the largest in Spain. The city has 17 universities and over 30 research centres. It is the second metropolis in the EU by population, and the third by gross internal product. Leading employers include Telefónica, Iberia, Prosegur, BBVA, Urbaser, Dragados, and FCC.