Assessing the regime-switching role of risk mitigation measures on agricultural vulnerability: A threshold analysis

IF 6.6 2区 经济学 Q1 ECOLOGY
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引用次数: 0

Abstract

Vulnerability to agrometeorological disasters threatens agricultural production and food security, which calls for urgent risk mitigation measures. Previous studies have widely focused on constructing composite indices of agricultural vulnerability and projecting agricultural losses under changing climate. Only a few authors have delved into the patterns of mitigation practices in reducing agricultural vulnerability and enhancing the functioning of agricultural systems. To fill this research gap, our study assesses the spatial-temporal characteristics of agricultural vulnerability with respect to meteorological disasters (including droughts, floods, hail, low temperatures, and frost) from 2000 to 2021 across 31 regions (including 22 provinces, 4 direct-administered municipalities, and 5 autonomous regions) in China. Identifying a dynamic trend of agricultural vulnerability and making use of a regime-switching framework, a Markov regime-switching model is employed to examine the changing regimes underlying the link between agricultural vulnerability and crop yields. More importantly, regime-switching roles of four different mitigation practices (i.e., irrigation, reservoir capacity, soil loss control, and drainage systems) in moderating agricultural vulnerability are evaluated using panel threshold regressions. Our results show that: 1) The link between agricultural vulnerability and crop yields differs across regions, and regime-switching phenomena behind this link can be detected. 2) Irrigation systems, water reservoirs, and soil loss control can be effective tools for mitigating agricultural vulnerability. 3) With the above three measures, detrimental impacts of agricultural vulnerability on agricultural production can be reduced significantly when certain thresholds are hit. 4) Non-linear relationships between mitigation measures and crop yields require authorities to pay considerable attention to determining the effective scales of mitigation measures. Overall, this paper shall contribute to understanding the moderating role of risk mitigation measures in alleviating agricultural vulnerability and increasing crop yields, thereby providing insights into designing strategies and policies for sustainable agricultural production.

评估风险缓解措施对农业脆弱性的制度转换作用:阈值分析
农业气象灾害的脆弱性威胁着农业生产和粮食安全,因此需要采取紧急风险缓解措施。以往的研究普遍侧重于构建农业脆弱性综合指数和预测气候变化下的农业损失。只有少数学者深入研究了减灾措施在降低农业脆弱性和增强农业系统功能方面的模式。为了填补这一研究空白,我们的研究评估了 2000 年至 2021 年中国 31 个地区(包括 22 个省、4 个直辖市和 5 个自治区)在气象灾害(包括干旱、洪涝、冰雹、低温和霜冻)方面的农业脆弱性时空特征。通过识别农业脆弱性的动态趋势,并利用制度转换框架,采用马尔可夫制度转换模型来研究农业脆弱性与作物产量之间联系的制度变化。更重要的是,利用面板阈值回归评估了四种不同的缓解措施(即灌溉、水库容量、土壤流失控制和排水系统)在调节农业脆弱性方面的制度转换作用。结果表明1) 农业脆弱性与作物产量之间的联系在不同地区有所不同,并且可以检测到这种联系背后的制度转换现象。2)灌溉系统、水库和土壤流失控制可以成为减轻农业脆弱性的有效工具。3) 通过上述三项措施,当达到一定阈值时,农业脆弱性对农业生产的不利影响就会大大降低。4) 减缓措施与作物产量之间的非线性关系要求有关部门在确定减缓措施的有效规模时予以高度重视。总之,本文将有助于理解风险缓解措施在减轻农业脆弱性和提高作物产量方面的调节作用,从而为设计可持续农业生产的战略和政策提供启示。
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来源期刊
Ecological Economics
Ecological Economics 环境科学-环境科学
CiteScore
12.00
自引率
5.70%
发文量
313
审稿时长
6 months
期刊介绍: Ecological Economics is concerned with extending and integrating the understanding of the interfaces and interplay between "nature''s household" (ecosystems) and "humanity''s household" (the economy). Ecological economics is an interdisciplinary field defined by a set of concrete problems or challenges related to governing economic activity in a way that promotes human well-being, sustainability, and justice. The journal thus emphasizes critical work that draws on and integrates elements of ecological science, economics, and the analysis of values, behaviors, cultural practices, institutional structures, and societal dynamics. The journal is transdisciplinary in spirit and methodologically open, drawing on the insights offered by a variety of intellectual traditions, and appealing to a diverse readership. Specific research areas covered include: valuation of natural resources, sustainable agriculture and development, ecologically integrated technology, integrated ecologic-economic modelling at scales from local to regional to global, implications of thermodynamics for economics and ecology, renewable resource management and conservation, critical assessments of the basic assumptions underlying current economic and ecological paradigms and the implications of alternative assumptions, economic and ecological consequences of genetically engineered organisms, and gene pool inventory and management, alternative principles for valuing natural wealth, integrating natural resources and environmental services into national income and wealth accounts, methods of implementing efficient environmental policies, case studies of economic-ecologic conflict or harmony, etc. New issues in this area are rapidly emerging and will find a ready forum in Ecological Economics.
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