This contribution presents an ethnographic report of the social relationships between men and women in five households situated
in the region of Ponta de Pedras, Marajó Island, Pará, in the beginning of the 1990s. From these reports, Siqueira concludes
that the women’s power degrees in influencing household decision making is highly affected by the following factors: type
of rights they hold regarding land property, effective economic contribution and education, the latter not necessarily formal.
In these arrangements, the decision making process can be centralised on the masculine figure (the ‘head of the household’)
or else shared, in a negotiated way, between the spouses. Siqueira stresses that to understand and to valorise woman’s role,
as well as understanding the households’ dynamics in detail, is fundamental to the eventual success of projects aiming the
improvement of these families’ material life quality.