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祸不单行:塞内加尔农村的结构变革、多重冲击与儿童营养不良

Misfortunes never come singly: Structural change, multiple shocks and child malnutrition in rural Senegal.

作者信息

Lazzaroni Sara, Wagner Natascha

机构信息

Department of Economics, University of Bologna, Piazza Scaravilli 2, 40126 Bologna, Italy.

International Institute of Social Studies of Erasmus University Rotterdam, Kortenaerkade 12, 2518 AX The Hague, Netherlands.

出版信息

Econ Hum Biol. 2016 Dec;23:246-262. doi: 10.1016/j.ehb.2016.10.006. Epub 2016 Oct 21.

Abstract

This study considers the two most pronounced shocks Senegalese subsistence farmers struggle with, namely increasing purchase prices and droughts. We assess the relationship of these self-reported shocks with child health in a multi-shock approach to account for concomitance of adverse events from the natural, biological, economic and health sphere. We employ a unique farming household panel dataset containing information on children living in poor, rural households in eight regions of Senegal in 2009 and 2011 and account for structural changes occurring between survey periods due to the large scale, national Nutrition Enhancement Program. By zooming in to the micro level we demonstrate that Senegal as a Sahelian country, mainly reliant on subsistence agriculture, is very vulnerable to climate variability and international price developments: According to our conservative estimates, the occurrence of a drought explains 25% of the pooled weight-for-age standard deviation, income losses 31%. Our multi-shock analysis reveals that the shocks are perceived as more severe in 2011 with droughts explaining up to 44% of the standard deviation of child health, increased prices up to 21%. Yet, the concomitance of droughts and increased prices after the structural change, i.e. the Nutrition Enhancement Program, indicates that the health of children experiencing both shocks in 2011 has improved. We argue that these results are driven by the increase in rural household income as theoretically outlined in the agricultural household model. Thus, adequate policy responses to shocks do not only depend on the nature but also on the concomitance of hazardous events.

摘要

本研究考察了塞内加尔自给自足农民面临的两个最突出的冲击,即购买价格上涨和干旱。我们采用多冲击方法评估这些自我报告的冲击与儿童健康之间的关系,以考虑自然、生物、经济和健康领域不良事件的同时发生情况。我们使用了一个独特的农户面板数据集,其中包含2009年和2011年塞内加尔八个地区贫困农村家庭中儿童的信息,并考虑了由于大规模的国家营养强化计划在调查期间发生的结构变化。通过深入微观层面,我们表明,作为一个主要依赖自给农业的萨赫勒国家,塞内加尔极易受到气候变异性和国际价格变化的影响:根据我们的保守估计,干旱的发生解释了合并后的年龄别体重标准差的25%,收入损失解释了31%。我们的多冲击分析表明,2011年这些冲击被认为更为严重,干旱解释了儿童健康标准差的高达44%,价格上涨解释了高达21%。然而,在结构变化即营养强化计划之后,干旱和价格上涨同时出现,这表明2011年同时经历这两种冲击的儿童的健康状况有所改善。我们认为,这些结果是由农业家庭模型理论中概述的农村家庭收入增加所驱动的。因此,对冲击的适当政策应对不仅取决于灾害事件的性质,还取决于其同时发生情况。

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