secheresse-et-fertilite--prix-du-meilleur-papier-pour-luca-tiberti-et-sylvain-dessy
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École supérieure d’études internationales

Mercredi 16 octobre 2019

Sécheresse et fertilité - Prix du meilleur papier pour Luca Tiberti et Sylvain Dessy

Un article de nos collègues du Département d'économique, Sylvain Dessy et Luca Tiberti (et deux autres collaborateurs) a reçu le prix du meilleur papier lors de la 8e conférence de l'Italian Association of Applied and Agricultural Economics, en juin 2019. L'article s'intitule «Fertility After the Drought: Theory and Evidence from Madagascar».

Coécrit avec Francesca Marchetta (professeure au CERDI, France) et Roland Pongou (professeur à l’Université d’Ottawa), le texte explique le lien de causalité entre les sécheresses et la fertilité des femmes dans les communautés agraires de Madagascar.

Résumé : In communities highly dependent on rainfed agriculture for their livelihoods, the common occurrence of climatic shocks such as droughts can lower the opportunity cost of having children, and raise fertility. Using longitudinal household data from Madagascar, we estimate the causal effect of drought occurrences on fertility, and explore the nature of potential mechanisms driving this effect. We exploit exogenous within-district year-to-year variation in rainfall deficits, and find that droughts occurring during the agricultural season significantly increase the number of children born to women living in agrarian communities. This effect is long lasting, as it is not reversed within four years following the drought occurrence. Analyzing the mechanism, we find that droughts have no effect on common underlying factors of high fertility such as marriage timing and child mortality. Furthermore, droughts have no significant effect on fertility if they occur during the non-agricultural season or in non-agrarian communities, and their positive effect in agrarian communities is mitigated by irrigation. These findings provide evidence that a low opportunity cost of having children is the main channel driving the fertility effect of drought in agrarian communities.

Accéder au texte complet sur la page de SSRN 

 

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