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This paper compares and contrasts changing rural–urban linkages drawing on research in six case study areas in Mali, Nigeria and Tanzania. The aim of the research was to gain a better understanding of the ways in which the livelihoods of rural and urban households rely on both rural-based and urban-based resources, and on exchanges between urban and rural areas. The paper describes changes in farming systems under the impact of urban expansion, with special attention to access to land and other natural resources such as water, and also access to markets and the role of traders, especially small-scale operators. It also examines how changing rural and urban contexts, as well as wider national and regional contexts, affect patterns of income diversification and mobility, especially the differential impacts with regard …