“…When high quality is limited to one or few institutions in the country, inbreeding may happen (Berelson, 1960;Eisenberg & Wells, 2000;Horta et al, 2011;Horta & Yudkevich, 2016;Wells et al, 1979). However, some suggest that institutions might prioritize hiring their own alumni, expecting that it will diminish risk and the cost of further training (Bauder, 2006;Blossfeld & Mayer, 1988;Doeringer & Piore, 1971;May et al, 2013;Rosenblum & Rosenblum, 1990). Torre et al (2021) imply that in Spain, field specialization is also a factor.…”