SOCIAL SCIENCE Social Work Aspect social Demographic transition Dwellings Éducation non formelle Forecasting Habitations Housing Housing forecasting Housing, Cooperative Intergenerational relations Jeunesse Logement Logement coopératif Non-formal education Older people Population aging Prévision Relations entre générations Service social aux personnes âgées Social aspects Social work with older people Transition démographique Vieillissement de la population Youth