“…For the Spanish case, there is a large literature devoted to the returns to education Hevia 2006, 2008;Arrazola et al 2003;Barceinas et al 2002;Budría and Moro 2008;Caparrós et al 2001;De la Rica and Ugidos 1995;García and Montuenga 2005;Marcenaro and Navarro 2005). However, while higher education has been analysed in Spain (Mora and Ayala 2000;Mora et al 2006;Mora, García, and García 2000;Sanchez Ferrer 1996), the returns to higher education, and in particular doctorates, have not been analysed.…”