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As previous research has shown that inbreeding is detrimental for research collaborations, it is hypothesised that academic inbreeding will lead to smaller research networks and, consequently, to fewer co\u2010authored publications outside the institution of affiliation. Relying on a large data set which merged information on academics, their inbreeding status and their publications, binomial negative and fractional models were estimated to test the hypothesis. Findings show that inbred academics have smaller research networks; while they publish most co\u2010authored papers, the relative weight of publications written in collaboration with institutional colleagues is the highest. In contrast, non\u2010inbred academics with foreign PhDs have larger co\u2010authorship networks. However, they publish most single\u2010authored papers and the weight of their international co\u2010authorships is heaviest.<\/jats:p><\/jats:sec><jats:sec><jats:title>Abstrato<\/jats:title><jats:p>Este artigo pretende analisar a rela\u00e7\u00e3o entre a endogamia acad\u00e9mica e a colabora\u00e7\u00e3o na investiga\u00e7\u00e3o, partindo das publica\u00e7\u00f5es em coautoria. Dado que alguns estudos mostraram que a endogamia \u00e9 prejudicial para as colabora\u00e7\u00f5es na investiga\u00e7\u00e3o, a hip\u00f3tese deste artigo \u00e9 a de que a endogamia acad\u00e9mica est\u00e1 associada a redes de investiga\u00e7\u00e3o mais pequenas e a menos publica\u00e7\u00f5es em coautoria fora da institui\u00e7\u00e3o de afilia\u00e7\u00e3o. Recorrendo a uma base de dados que combina informa\u00e7\u00e3o sobre acad\u00e9micos, o seu estatuto de endogamia e as suas publica\u00e7\u00f5es, foram estimados modelos binomiais negativos e fracion\u00e1rios para testar a hip\u00f3tese. Os resultados mostram que os acad\u00e9micos endog\u00e2micos t\u00eam redes de investiga\u00e7\u00e3o menores; embora publiquem a maioria dos artigos em coautoria, o peso relativo das publica\u00e7\u00f5es escritas em colabora\u00e7\u00e3o com colegas institucionais \u00e9 superior. Em contraste, os acad\u00e9micos n\u00e3o\u2010endog\u00e2micos, com doutoramentos obtidos no estrangeiro, t\u00eam redes de coautoria maiores. No entanto, s\u00e3o tamb\u00e9m estes que mais publicam artigos sozinhos e o peso das suas coautorias internacionais \u00e9 superior.<\/jats:p><\/jats:sec>","DOI":"10.1111\/hequ.12301","type":"journal-article","created":{"date-parts":[[2021,1,15]],"date-time":"2021-01-15T05:42:58Z","timestamp":1610689378000},"page":"102-115","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":23,"title":["Inbreeding and research collaborations in Portuguese higher education"],"prefix":"10.1111","volume":"76","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8750-2032","authenticated-orcid":false,"given":"Orlanda","family":"Tavares","sequence":"first","affiliation":[{"name":"A3ES (Agency for Assessment and Accreditation of Portuguese Higher Education)  Lisbon Portugal"},{"name":"CIPES (Centre for Research in Higher Education Policies)  Matosinhos Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6039-8194","authenticated-orcid":false,"given":"Cristina","family":"Sin","sequence":"additional","affiliation":[{"name":"A3ES (Agency for Assessment and Accreditation of Portuguese Higher Education)  Lisbon Portugal"},{"name":"CIPES (Centre for Research in Higher Education Policies)  Matosinhos Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3255-4687","authenticated-orcid":false,"given":"Carla","family":"S\u00e1","sequence":"additional","affiliation":[{"name":"CIPES (Centre for Research in Higher Education Policies)  Matosinhos Portugal"},{"name":"University of Minho, NIPE (Centre for Research in Economics and Management)  Braga Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7763-0615","authenticated-orcid":false,"given":"Sylwia","family":"Bugla","sequence":"additional","affiliation":[{"name":"CRACS \u2013 INESC TEC  Porto Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4263-3765","authenticated-orcid":false,"given":"Alberto","family":"Amaral","sequence":"additional","affiliation":[{"name":"A3ES (Agency for Assessment and Accreditation of Portuguese Higher Education)  Lisbon Portugal"},{"name":"CIPES (Centre for Research in Higher Education Policies)  Matosinhos Portugal"}]}],"member":"311","published-online":{"date-parts":[[2021,1,11]]},"reference":[{"issue":"1","key":"e_1_2_10_2_1","first-page":"13","article-title":"Author collaboration and productivity at the University of Zambia, 2002\u20132007","volume":"19","author":"Akakandelwa A.","year":"2009","journal-title":"African Journal of Library, Archives and Information Science"},{"issue":"1","key":"e_1_2_10_3_1","first-page":"17","article-title":"Research collaboration landscape of the university of Ibadan biomedical authors between 2006 and 2015","volume":"28","author":"Asubiaro T. 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