Climate change is one of the biggest challenges of the 21st century. It affects all countries in the world, especially Sahelian countries in Africa. This paper aimed at evaluating the impact of climate change on cereal yield in Burkina Faso. The ordinary least squares (OLS) was applied to time-series data from 1991 to 2016 collected on the World Bank website. The results have shown that temperature adversely affects yield and cereal production, while precipitation has positive effect. An increase in rainfall of 1 millimetre would increase cereal production by 385 tons in the long term and 252 tons in the short term. In the same, an increase in rainfall of 1 millimetre would increase agricultural yield by 9 kg per hectare in the long term. However, in the short term, an increase in temperatures of 1ºC would result in a decrease in cereal production and agricultural yield of 134748 tons and 72 kg per hectare, respectively. However, in the long term, a rise in temperatures of 1ºC would result in a decrease in cereal production and cereal yield of 154 634 tons and 1074 kg per hectare, respectively. Besides, the results indicate that the emission of carbon dioxide (CO2) has no significant effect on yield and cereal production. Implementing effective adaptation strategies, such as access to improved seed, introduce smart agriculture in the system of cereal in Burkina Faso and increasing irrigation infrastructure could reduce the cereal production's vulnerability to climate shocks.

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Cet article étudie le lien entre l’efficacité de l’intermédiation financière et la croissance économique sur un panel de sept pays de l’UEMOA sur la période 1990-2008. Tout d’abord, un modèle théorique est présenté dans lequel l’efficacité de l’intermédiation bancaire renforce la croissance économique par le biais de l’amélioration de la productivité marginale du capital. Ensuite, l’efficacité du secteur bancaire est étudiée par le concept d’efficacité-X de Leibenstein (1966). Les scores d’efficacité bancaire sont estimés par la méthode DEA (Data Envelopment Analysis), appliquée à un modèle de production bancaire sur un échantillon de banques de l’UEMOA. Finalement, les scores moyens d’efficacité bancaire par pays sont calculés et utilisés comme indicateur de l’efficacité de l’intermédiation financière dans un modèle de croissance sur données de panel. Les résultats suggèrent l’existence d’une influence positive et significative de l’efficacité du secteur bancaire sur la croissance économique.This paper explores the connection between financial intermediation efficiency and economic growth on a panel of seven countries of WAEMU from 1990 to 2008. First, a theoretical model is presented in which financial efficiency enhances economic growth by means of increasing the marginal productivity of capital. Next, the banking sector efficiency is apprehended by the X-efficiency concept of Leibenstein (1966). Banking efficiency scores are estimated with Data Envelopment Analysis method, applied to banking production model on a sample of banks of the WAEMU. Finally, average scores of banking efficiency by country are calculated and used as indicator of financial intermediation efficiency in a growth model on panel data. Results suggest the existence of a positive impact of the banking sector efficiency on the economic growth

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