• Preference for sons and sex ratio in two non-western societies 

      Crognier, E; Baali, A; Hilali, MK; Villena, M; Vargas, E (American Journal of Human Biology, 2006)
      ABSTRACT Moroccan Berbers and the Bolivian Aymara are two unrelated peasant groups living in adverse environments with a still rather traditional agriculture. Precarious life conditions may be responsible for the importance ...