5. Discussion and conclusions
Global rankings, an outcome of the increasing internationalisation of higher education, have led to the redesign of the ideal model for universities as researchintensive institutions. Such institutions are able to attract international talent and deploy other resources required to compete on the global higher education market. National universities therefore face a dual challenge when seeking to enhance their international reputation. On the one hand they need to strengthen their bonds with other institutions to optimise resources and capitalise on complementary capacities, and on the other they must raise their international visibility to attract resources and establish their standing in a worldwide scenario (De Filippo et al., 2013). The changing circumstances in which these institutions are immersed require new models for conducting and interpreting their scientific activity in which all the available resources and the results obtained within their international sphere of influence are taken into consideration.