“…For instance, Fini et al (2017) distinguish the quantity of spin-offs, that is the number of university spin-offs from a given university in a given year, and the quality of spin-offs, operationalised as the number of university spin-offs from a given university in a given year, which have received a first round of venture capital financing in that year. Other frequently used metrics are: patents (e.g., Urbano and Guerrero, 2013;Secundo and Elia, 2014;Guerrero et al, 2015;Perkmann et al 2015;Riviezzo et al, 2019a); consulting or professional contracts (e.g., Perkmann et al, 2015;Guerrero et al, 2015;Trequattrini et al, 2018); publications (e.g., Urbano and Guerrero, 2013;Secundo and Elia, 2014); entrepreneurial education (e.g., Secundo and Elia, 2014;Trequattrini et al, 2018); student or researcher exchange (e.g., Urbano and Guerrero, 2013); facilities (Guerrero et al, 2015); networking and collaboration with industry (e.g., Secundo and Elia, 2014;Guerrero et al, 2015).…”