Bocquier Philippe auteur aut IRD Khasakhala A. auteur aut IRD text journalArticle eng Using retrospective data from the Urban Integration Survey conducted in 2001 in Nairobi, Kenya, on a sample of 955 women and men aged 25-54, this paper compares factors influencing entry into union formation for men and women. The analysis uses event history methods, specifically Cox Proportional Hazards regression, stratified by age cohort and run separately by sex. The results indicate that delay in union formation is more pronounced for women than for men. Cohabitation without formal marriage is the prominent form of union, especially among the younger generation, and appears to have increased. For men, the timing of union is more dependent upon human capital acquisition than oil cultural factors. These findings show that the marriage search model, which was first applied in Western countries, can also hold in cities of developing Countries. Nonetheless, neither the search model nor the integration or the independence models apply to women's union formation, which very few exogenous factors can explain. specialized 108 41 4 433-455 2009 0021-9320 https://www.documentation.ird.fr/hor/PAR00003957 10.1017/s0021932009003319 0021-9320 https://www.documentation.ird.fr/hor/PAR00003957 IRD - Base Horizon / Pleins textes 2009-09-01 2017-08-23 PAR00003957 fre