%D 2023 %T Fertility and polygyny: Experimental evidence from Burkina Faso %V 164 %A B D'Exelle %A A Lépine %A R Bakyono %A LDG Tapsoba %X Decision-making about fertility differs between monogamous and polygynous households. In an experiment in Burkina Faso that gives women access to free contraceptives, either alone or with their husband, involving the husband decreases contraceptive use among monogamous women, but not among polygynous women. Where there is co-wife rivalry, it increases contraceptive use. This is consistent with a model where monogamous women have a stronger preference for contraceptives than their husband, while this preference difference is smaller or even reversed among polygynous households due to co-wife competition around fertility. %O This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ %I Elsevier BV %J Journal of Development Economics %K Fertility, Polygyny, Africa %L discovery10174549