埃塞俄比亚家庭粮食不安全水平的空间效应:基于有序地理加性模型

The spatial effects of the household's food insecurity levels in Ethiopia: by ordinal geo-additive model.

作者信息

Wubetie Habtamu T, Zewotir Temesgen, Mitku Aweke A, Dessie Zelalem G

机构信息

College of Science, Bahir Dar University, Bahir Dar, Ethiopia.

Department of Statistics, College of Natural and Computational Science, University of Gondar, Gondar, Ethiopia.

出版信息

Front Nutr. 2024 Feb 29;11:1330822. doi: 10.3389/fnut.2024.1330822. eCollection 2024.

Abstract

BACKGROUND

Food insecurity and vulnerability in Ethiopia are historical problems due to natural- and human-made disasters, which affect a wide range of areas at a higher magnitude with adverse effects on the overall health of households. In Ethiopia, the problem is wider with higher magnitude. Moreover, this geographical distribution of this challenge remains unexplored regarding the effects of cultures and shocks, despite previous case studies suggesting the effects of shocks and other factors. Hence, this study aims to assess the geographic distribution of corrected-food insecurity levels (FCSL) across zones and explore the comprehensive effects of diverse factors on each level of a household's food insecurity.

METHOD

This study analyzes three-term household-based panel data for years 2012, 2014, and 2016 with a total sample size of 11505 covering the all regional states of the country. An extended additive model, with empirical Bayes estimation by modeling both structured spatial effects using Markov random field or tensor product and unstructured effects using Gaussian, was adopted to assess the spatial distribution of FCSL across zones and to further explore the comprehensive effect of geographic, environmental, and socioeconomic factors on the locally adjusted measure.

RESULT

Despite a chronological decline, a substantial portion of Ethiopian households remains food insecure (25%) and vulnerable (27.08%). The Markov random field (MRF) model is the best fit based on GVC, revealing that 90.04% of the total variation is explained by the spatial effects. Most of the northern and south-western areas and south-east and north-west areas are hot spot zones of food insecurity and vulnerability in the country. Moreover, factors such as education, urbanization, having a job, fertilizer usage in cropping, sanitation, and farming livestock and crops have a significant influence on reducing a household's probability of being at higher food insecurity levels (insecurity and vulnerability), whereas shocks occurrence and small land size ownership have worsened it.

CONCLUSION

Chronically food insecure zones showed a strong cluster in the northern and south-western areas of the country, even though higher levels of household food insecurity in Ethiopia have shown a declining trend over the years. Therefore, in these areas, interventions addressing spatial structure factors, particularly urbanization, education, early marriage control, and job creation, along with controlling conflict and drought effect by food aid and selected coping strategies, and performing integrated farming by conserving land and the environment of zones can help to reduce a household's probability of being at higher food insecurity levels.

摘要

背景

由于自然和人为灾害,埃塞俄比亚的粮食不安全和脆弱性问题由来已久,这些灾害在很大程度上影响了广泛地区,对家庭的整体健康产生了不利影响。在埃塞俄比亚,这个问题更为严重,影响范围更广。此外,尽管之前的案例研究表明了冲击和其他因素的影响,但关于文化和冲击的影响,这一挑战的地理分布仍未得到探索。因此,本研究旨在评估各地区校正后的粮食不安全水平(FCSL)的地理分布,并探讨各种因素对家庭粮食不安全各水平的综合影响。

方法

本研究分析了2012年、2014年和2016年三期基于家庭的面板数据,总样本量为11505,涵盖该国所有地区州。采用扩展加法模型,通过使用马尔可夫随机场或张量积对结构化空间效应进行建模,以及使用高斯对非结构化效应进行建模的经验贝叶斯估计,来评估各地区FCSL的空间分布,并进一步探讨地理、环境和社会经济因素对局部调整后的测量值的综合影响。

结果

尽管呈逐年下降趋势,但仍有很大一部分埃塞俄比亚家庭粮食不安全(25%)且易受影响(27.08%)。基于广义方差成分(GVC),马尔可夫随机场(MRF)模型拟合效果最佳,表明总变异的90.04%由空间效应解释。该国大部分北部和西南部地区以及东南部和西北部地区是粮食不安全和脆弱性的热点地区。此外,教育、城市化、就业、作物种植中化肥的使用、卫生设施以及养殖牲畜和作物等因素对降低家庭处于较高粮食不安全水平(不安全和脆弱)状态的概率有显著影响,而冲击的发生和小土地所有权则使其情况恶化。

结论

长期粮食不安全地区在该国北部和西南部地区呈现出强烈的聚集性,尽管埃塞俄比亚家庭粮食不安全的较高水平多年来呈下降趋势。因此,在这些地区,针对空间结构因素的干预措施,特别是城市化、教育、控制早婚和创造就业机会,同时通过粮食援助和选定的应对策略控制冲突和干旱影响,并通过保护地区土地和环境进行综合农业生产,有助于降低家庭处于较高粮食不安全水平的概率。

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