Resource deprivation and socio-economic changes among pastoral households. The case of Karayu and Itu pastoralists in the Middle Awash Valley of Ethiopia

agricultura comercial agriculture commerciale cambio estructural changement structurel commercial farming derecho de uso environmental impact ethiopia ethnic groups etiopia ganado gestion des ressources hogares households impact sur l'environnement impacto ambiental indigenous knowledge interest groups land ownership livestock natural resources pastoral society pastoralism pastoralisme pastoralismo propiedad de la tierra recursos naturales resource management ressource naturelle right of access sociedad pastoral socioeconomic development structural change tenencia tenure