Matthew Lockwood¡OS Rs//rIfe, 1991. vol 22 so 3. teslitsle of Development Studies, Sussex demographic motivation and behaviour, it is necessary to examine these causes and effects at the level of individuals and households, rather than at district or state level. Two factors are important in this context: first, the proximate determinants of fertility, and potential sources of responsiveness to economic conditions; and, second, the consequences of demographic behaviour, especially for different economic strata.Existing studies suggest that fertility determinants are rather unresponsive to economic conditions, and that economic and kinship relations act to support the maintenance of high fertility, even where land is scarce for some.In a final section, the controversy over policy - In the intervening years, densely settled areas have spread, and towns mushroomed, giving rise to what is At this point a couple of disclaimers must be made. The aim is to provide an approach, not a set of research results. The analysis is based entirely on secondary sources. Secondly, the discussitim of the effects of fertility experience on food security and environmental management relies on sources dealing only with agriculturalists. The situation of Fulani agro-pastoralists in and around the densely settled zones may well be very different.
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