This paper provides a quantitative analysis of the nature of the informal sector's linkages with the formal sector in Nigeria. The informal sector has both backward and forward linkages with the formal sector. The backward linkages involve the flow of raw materials, equipment, finance and consumer goods from the formal sector to informal sector enterprises. Two types of forward linkages are identified. These are subcontracting agreements with large domestic companies, government agencies and foreign companies on the one hand, as well as the supply of consumer goods from informal sector enterprises to the formal sector on the other. The empirical analysis based on a logit regression model reveals that key variables accounting for the extent of backward linkages with the formal sector pertain to registration of the informal sector enterprise, level of investment, annual income of the entrepreneur, number of employees, entrepreneur's previous work experience and the education of employees. In the case of forward linkages with the formal sector, the most important variables are registration on the part of the informal sector enterprise, investment expended to date, annual income of the entrepreneur, level of profitability of the enterprise, vocational training and education of employees.Résumé: Le présent document fait une analyse quantitative de la nature des liaisons existant entre le secteur informel et le secteur formel au Nigeria. Le secteur informel a des liaisons aussi bien en 114

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One of the most visible and enduring manifestations of urban poverty in developing countries is the formation and proliferation of slums. While attention has focused on the rapid pace of urbanization as the sole or major factor explaining the proliferation of slums and squatter settlements in developing countries, there are other factors whose impacts are not known with much degree of certainty. It is also not clear how the effects of these factors vary across regions of the developing world. This paper accounts for differences in the prevalence of slums among developing countries using data drawn from the recent global assessment of slums undertaken by the United Nations Human Settlements Programme. The empirical analysis identifies substantial inter-country variations in the incidence of slums both within and across the regions of Africa, Asia as well as, Latin America and the Caribbean. Further analysis indicates that higher GDP…/

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This paper estimates housing tenure choice models for the Ibadan housing market in Nigeria. The empirical analysis based on a logit regression model reveals that the key determi- i-nants of the probability of home-ownership are: income, the investment motive for home-ownership, number of children in the house, gender of the head of household, stage in family life-cycle, length of stay in the city and access to land on the basis of ethnic qualification. Access to institutional sources of housing finance is selective and, as such, has not been effective in enhancing home-ownership across the city.