This paper presents a model of mobile space in the Sahel based on the two logics of circulation and production. An overview of the epistemological origins of the model shows how spatial structuring in (and of) the Sahel has been progressively transformed by the territorial action of economic actors, colonial powers, states and development programmes. The particular focus is on nomadic and cross-border spaces -configurations that offer an ideal perspective on the mobility of space. The model confirms the hypothesis that economic actors, states and development agencies all aim to improve the way uncertainty is managed, but remain profoundly divided over what strategies to adopt. Whereas free flows allow economic actors to obtain products wherever these may be available, states and development agencies conceive of territory as a resource that must drive the specialization of production. The proposed model also suggests that mobile space is not peculiar to the Sahel and that the spatial logics of circulation and production in the Sahel are also present in the process of globalization. It provides conceptual resources that could lead to other models potentially applicable to understanding uncertainty in a highly mobile, globalized world.

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