Climate Shocks, Vulnerability, Resilience and Livelihoods in Rural Zambia

Hambulo Ngoma, A. Finn, M. Kabisa
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引用次数: 3

Abstract

To what extent do the behavioral choices of Zambian smallholder farmers influence the negative effects of climate shocks, and what impact do these choices have on vulnerability and resilience? This paper uses nationally representative, three-wave household-level panel data to investigate these questions. The empirical estimation employs an instrumental variable probit regression model, which also controls for the endogeneity of key choice variables. There are four main empirical findings. First, droughts are the most prevalent climate shock rural smallholder farmers in Zambia face, but the extent of exposure differs spatially, with the Southern and Western Provinces being the hardest hit. Nationally, about three-quarters of all smallholder farmers are vulnerable and only about one-quarter are resilient. Second, increased climate shocks correlate with both increased vulnerability and reduced resilience, with short- and long-term deviations in seasonal rainfall worsening vulnerability and resilience. Third, higher asset endowments and education level of the household head reduce vulnerability and increase resilience among smallholder farmers. Female-headed households are more vulnerable and less resilient, on average. Fourth, the use of climate-smart agricultural practices—namely, minimum tillage and use of inorganic fertilizers or hybrid maize seed—significantly improves household resilience in the short term. The paper draws two main policy implications from the findings. First, the results point to an urgent need to invest in research and development for climate shock–tolerant crop varieties and in broader climate-smart agricultural technologies to scale out and scale up context-specific practices through innovative digital platforms. Second, more investment is needed in risk mitigation strategies such as weather indexed insurance, targeted social cash transfers and how to make these work effectively for smallholder farmers. Other important complementary elements include investment in innovative digital platforms that can facilitate timely delivery of climate information services and facilitating asset accumulation and education that can enable farmers to improve climate shock resilience over time.
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赞比亚农村的气候冲击、脆弱性、复原力和生计
赞比亚小农的行为选择在多大程度上影响了气候冲击的负面影响,这些选择对脆弱性和恢复力有什么影响?本文采用具有全国代表性的三波家庭水平面板数据来调查这些问题。经验估计采用工具变量probit回归模型,该模型还控制了关键选择变量的内生性。有四个主要的实证发现。首先,干旱是赞比亚农村小农面临的最普遍的气候冲击,但受影响的程度在空间上有所不同,南部和西部省份受影响最严重。在全国范围内,大约四分之三的小农户处于脆弱状态,只有大约四分之一的农户具有复原力。其次,气候冲击的增加与脆弱性的增加和恢复力的降低相关,季节性降雨的短期和长期偏差使脆弱性和恢复力恶化。第三,较高的资产禀赋和户主教育水平降低了小农的脆弱性,增强了其抵御能力。平均而言,女性户主的家庭更脆弱,抵御能力更弱。第四,采用气候智能型农业做法,即少耕和使用无机肥料或杂交玉米种子,可在短期内显著提高家庭抵御能力。这篇论文从研究结果中得出了两个主要的政策含义。首先,研究结果表明,迫切需要投资于耐气候冲击作物品种的研发和更广泛的气候智慧型农业技术,以便通过创新的数字平台推广和扩大针对具体情况的实践。其次,需要在风险缓解战略方面进行更多投资,例如天气指数保险、有针对性的社会现金转移以及如何使这些战略对小农有效。其他重要的补充要素包括投资于创新的数字平台,以促进及时提供气候信息服务,促进资产积累和教育,使农民能够随着时间的推移提高气候冲击的抵御能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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