The Paradigm of African Agricultural Efficiency, 1967-2012: What Does Meta-Analysis Reveal?
The Paradigm of African Agricultural Efficiency, 1967-2012: What Does Meta-Analysis Reveal?
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DOI：
10.22004/ag.econ.160418
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发表时间：
2013-08
影响因子：
--
通讯作者：
Kolawole Ogundari
中科院分区：
文献类型：
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作者：
Kolawole Ogundari
本研究调查了多年来非洲农业效率水平的发展(即上升或下降)以及驱动效率的因素。使用元回归分析(MRA)对379项前沿研究进行了实证分析，得出了534个农场层面的效率估计。结果表明，所选案例研究的平均效率估计值随着初步研究中调查年限的增加而显着降低。显然，这意味着多年来，非洲农业和粮食生产的增长以负效率变化为特征。MRA中考虑的其他研究属性的影响表明，发表在期刊上的研究，具有参数和原始技术规范，产生显著更高的效率估计，而发表在顶级期刊上的研究，以及使用柯布-道格拉斯和Translog函数形式的研究，产生显著较低的效率估计。其他结果表明，教育、其次是经验、推广和信贷是多年来非洲农业效率水平的主要驱动因素。鉴于这些调查结果，我们建议优先考虑鼓励投资于与教育和推广相关的人力资本发展的政策，以促进该区域农业和粮食生产的增长。
The present study investigates the development (i.e., rise or decline) in African agricultural efficiency level and what drives the efficiency over the years. A total of 379 frontier studies resulting in 534 farm level efficiency estimates were considered using meta-regression analysis (MRA) for the empirical analysis. The results show that mean efficiency estimates from the selected case studies decrease significantly as year of survey in the primary study increases. Apparently, this implies that over the years, negative efficiency change characterized the growth of African agriculture and food production. The effect of other study attributes considered in the MRA show that studies published in Journals, with parametric and primal technology specification produced significantly higher efficiency estimates, while those published in top ranking journals and with Cobb-Douglass and Translog functional forms produced significantly lower efficiency estimates. Other results show that education, followed by experience; extension and credit are the major drivers of agricultural efficiency levels in Africa over the years. Given these findings; we suggest policies that encourage investment in human capital development associated with education and extension should be prioritized to enhance the growth of agriculture and food production in the region.