Résumé en anglais

In this study, based on Niger 2012 Labour force survey, we assess the importance of the effect of siblings’ networks on Niger labour market integration and the potential heterogeneity of this effect. Our main result is that there is a spillover effect: for any given individual, having elder siblings in a given sector of activity increases his own probability of also integrating that sector. For those in particular whose siblings are in the fruitful public or private sectors, this means that they have additional chances to integrate these coveted sectors. We also show that siblings' network is gender sensitive: its effect is maximal when both siblings are of the same gender. Another important result which emerges from this study is that the siblings’ network acts as a substitute in case of poor human capital or family background resources.