Inbreeding as measured by dispensations and isonymy in Rio de Onor, Portugal

[Resumen extraido de la fuente principal]

This study examines the coefficient of inbreeding in the population of Rio de Onor (Portugal), for a period of 120 years. Two distinct methods were used: the dispensations for consaguineous marriages and isonymy. The two methods produced different results and these differences are explained, for the period after 1960, in terms of emigration.