Evaluating the impact of improved maize varieties on food security in Rural Tanzania: Evidence from a continuous treatment approach
Evaluating the impact of improved maize varieties on food security in Rural Tanzania: Evidence from a continuous treatment approach
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DOI：
10.1007/s12571-014-0332-x
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发表时间：
2014-04-01
期刊：
影响因子：
6.7
通讯作者：
Mattei, Alessandra
中科院分区：
文献类型：
--
作者：
Kassie, Menale;Jaleta, Moti;Mattei, Alessandra
本文利用坦桑尼亚农村的数据，研究了采用改良玉米品种的影响异质性。我们使用了一个广义的倾向得分匹配方法，辅之以参数计量经济学方法来检查结果的稳健性。我们发现，在不同的模型中，结果是一致的，这表明采用提高了粮食安全，采用的影响随着采用的程度而变化。平均而言，分配给改良玉米品种的面积每增加一英亩，慢性和暂时性粮食不安全的概率分别从0.7%和1.2%降低到1.1%和1.7%。提高玉米生产力和缓解农民采用限制的政策可以确保分配更多的土地用于改良技术，从而加强家庭的粮食安全。
This paper investigates impact heterogeneity in the adoption of improved maize varieties using data from rural Tanzania. We used a generalized propensity-score matching methodology, complemented with a parametric econometric method to check the robustness of results. We found a consistent result across models, indicating that adoption increased food security, and that the impact of adoption varied with the level of adoption. On average, an increase of one acre in the area allocated to improved maize varieties reduced the probabilities of chronic and transitory food insecurity from between 0.7 and 1.2 % and between 1.1 and 1.7 %, respectively. Policies that increase maize productivity and ease farmers' adoption constraints can ensure the allocation of more land to improved technologies and, in doing so, enhance the food security of households.