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Gender differences in agricultural productivity in Côte d'Ivoire: Distribution, drivers, and changes over time 科特迪瓦农业生产力中的性别差异:分布、驱动因素和随时间的变化
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-03-08 DOI: 10.1111/cjag.12352
Aletheia Donald, Gabriel Lawin, Léa Rouanet

This paper analyzes changes in agricultural productivity gender gaps in Côte d'Ivoire between 2008 and 2016 using decomposition methods. The analysis finds that the gender gap went from 40% in food crops and 17% in exports crops in 2008, to 19% in food crops and a statistical zero in export crops in 2016. The overall gender gap decreased by 15 percentage points over this period, and is statistically insignificant in 2016 once accounting for whether households farm export crops. Moreover, our results show that while some drivers of the gender gap remain stable across the decade (including total land cultivated, and pesticide and fertilizer use), others change their contribution (number of plots, crop choice and household labor). Despite substantial improvements, female-headed households in the bottom half of the distribution remain disadvantaged. Our results indicate that strengthening women's access to agricultural labor and adoption of export crops are policy priorities to reach gender parity.

本文采用分解方法分析了 2008 年至 2016 年科特迪瓦农业生产力性别差距的变化。分析发现,性别差距从 2008 年粮食作物的 40%和出口作物的 17%,下降到 2016 年粮食作物的 19%和出口作物的零。在此期间,总体性别差距下降了 15 个百分点,在 2016 年,一旦考虑到家庭是否种植出口作物,性别差距在统计上就不显著了。此外,我们的研究结果表明,虽然性别差距的某些驱动因素在这十年间保持稳定(包括耕地总面积、农药和化肥使用量),但其他驱动因素(地块数量、作物选择和家庭劳动力)却发生了变化。尽管情况有了很大改善,但处于分布下半部分的女户主家庭仍然处于不利地位。我们的研究结果表明,加强妇女获得农业劳动力的机会和采用出口作物是实现性别均等的政策重点。
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引用次数: 0
Urbanization and adoption of sustainable agricultural practices in the rural-urban interface of Bangalore, India 印度班加罗尔城乡结合部的城市化与可持续农业实践的采用
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-03-01 DOI: 10.1111/cjag.12355
Verena Preusse, Nils Nölke, Meike Wollni

Urban expansion often takes place on the most productive agricultural lands, affecting how the remaining agricultural land is used. Evidence on the adoption of sustainable agricultural practices in urbanizing areas is scarce and mostly based on cross-sectional data. Cross-sectional studies, however, cannot reflect the dynamics of urbanization and adoption. We use household panel data from 2017 and 2020 to analyze the adoption of sustainable agricultural practices among peri-urban farmers in Bangalore, India, a rapidly urbanizing region. We focus on practices for water and erosion management, integrated pest management and soil fertility management, and an integrated package of sustainable practices. Using random effects probit models with the Mundlak approach, we consider various factors besides urbanization, including exposure to weather variability, awareness of climate change, connection with institutional actors, and household and farm characteristics. Results show that urbanization, measured as changes in the percentage of built-up area, reduces the probability that farmers adopt sustainable agricultural practices. Like prior studies, we find that wealth indicators, market access, knowledge of climate change, and rainfall variability facilitate adoption. However, contact with institutional actors largely reduces farmers’ probability of adoption. Policies should promote the integration of sustainable farming technologies at the institutional level and in information and training programs to achieve sustainable intensification of peri-urban agriculture.

城市扩张往往发生在最具生产力的农田上,从而影响到剩余农田的使用方式。有关城市化地区采用可持续农业做法的证据很少,而且大多基于横截面数据。然而,横截面研究无法反映城市化和采用的动态变化。我们利用 2017 年和 2020 年的家庭面板数据,分析了印度班加罗尔(一个快速城市化的地区)城郊农民采用可持续农业实践的情况。我们重点关注水和侵蚀管理、病虫害综合防治、土壤肥力管理以及一揽子可持续发展综合措施。我们采用蒙德拉克(Mundlak)方法的随机效应概率模型,考虑了城市化以外的各种因素,包括天气变化的影响、对气候变化的认识、与机构参与者的联系以及家庭和农场特征。结果表明,以建成区百分比变化衡量的城市化降低了农民采用可持续农业实践的概率。与之前的研究一样,我们发现财富指标、市场准入、气候变化知识和降雨量变化都有助于采用可持续农业实践。然而,与机构参与者的接触在很大程度上降低了农民采用可持续农业实践的概率。政策应在机构层面以及信息和培训计划中促进可持续农业技术的整合,以实现城郊农业的可持续集约化。
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引用次数: 0
On household food stock and waste under risk 关于面临风险的家庭粮食库存和废物
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-02-14 DOI: 10.1111/cjag.12354
Jian Li, Wuyang Hu, Ping Qing, Jean-Paul Chavas

This paper investigates household behavioral response to disruptions in the food supply chain, with a focus on the role for risk and its effects on household food stocks and food waste. We present an empirical analysis based on data from Chinese consumers over multiple periods in 2019 and during the COVID-19 crisis of 2020. We investigate how household behavior changed during the COVID-19 crisis, documenting both food stockpiling and increased food waste. The econometric analysis relies on a control function approach to handle endogeneity. We decompose the effects of increased risk on waste during the crisis into two components: the direct effect reflecting household decisions conditional on food stock; and the indirect effect associated with induced adjustments in food stock. Both effects on food waste are found to be positive, reflecting difficulties households have in managing large food stocks. We present evidence that one percentage point increase in household stocks during a period of supply disruption contributed to a 0.055–0.297 percentage point increase in food waste across food categories. We also present evidence that these effects may persist over time.

本文研究了家庭对食品供应链中断的行为反应,重点关注风险的作用及其对家庭食品库存和食品浪费的影响。我们基于中国消费者在 2019 年和 2020 年 COVID-19 危机期间多个时段的数据进行了实证分析。我们调查了 COVID-19 危机期间家庭行为的变化,记录了粮食储备和粮食浪费的增加。计量经济学分析采用控制函数法来处理内生性问题。我们将危机期间风险增加对浪费的影响分解为两个部分:反映以粮食库存为条件的家庭决策的直接影响;以及与粮食库存的诱导调整相关的间接影响。我们发现,这两种效应对粮食浪费的影响都是正向的,反映了家庭在管理大量粮食库存时遇到的困难。我们提出的证据表明,在供应中断期间,家庭存粮每增加一个百分点,各类食物的浪费率就会增加 0.055-0.297 个百分点。我们还提出了这些影响可能会长期存在的证据。
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引用次数: 0
How a price-support policy can hurt the environment: Empirical evidence from Northeast China 价格支持政策如何损害环境?中国东北地区的经验证据
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-02-09 DOI: 10.1111/cjag.12351
Jian Chen, Xiaohui Tian, Jialing Yu

During the corn stockpiling system reform in Northeast China between 2008 and 2015, corn production expanded dramatically, and corn residue, which was mostly burned in-situ, caused severe air pollution issues. Using a difference-in-differences approach, we assessed the effects of the corn stockpiling system reform in China and its associated environmental outcomes with a provincial-level dataset. Our results suggest that the implementation of this policy significantly increased annual corn production in Northeast China by 15.1%. We also observed a substitution pattern between corn and soybean cultivation in the treatment area, with a percentage point increase in the net soybean-to-corn profit ratio leading to a decrease in corn production by 0.023 percentage points. Overall, based on changes in crop patterns during the system reform, increased straw resulted in increased burning and the resulting consequence to the environment is a net pollution increase equivalent to 16.03%, 0.33%, and 3.64% of the smoke and dust, SO2, and NOX, respectively, from the industrial sector in the treatment provinces.

在 2008 年至 2015 年中国东北地区玉米收储制度改革期间,玉米产量急剧增长,而玉米秸秆大多就地焚烧,造成了严重的空气污染问题。我们采用差分法,通过省级数据集评估了中国玉米收储制度改革的影响及其相关环境结果。结果表明,这一政策的实施使中国东北地区的玉米年产量大幅提高了 15.1%。我们还观察到了处理区玉米和大豆种植之间的替代模式,大豆与玉米的净利润比每增加一个百分点,玉米产量就会减少 0.023 个百分点。总体而言,根据制度改革期间作物种植模式的变化,秸秆增加导致焚烧量增加,由此对环境造成的净污染增加相当于处理省份工业部门烟尘、二氧化硫和氮氧化物分别增加 16.03%、0.33% 和 3.64%。
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引用次数: 0
Bioenergy feedstock supply from wheat straw: A farm level model incorporating trade-offs in crop choices, disease risk, and soil fertility 小麦秸秆生物能源原料供应:包含作物选择、疾病风险和土壤肥力权衡的农场级模型
IF 2.5 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-02-06 DOI: 10.1111/cjag.12350
Curtis J. McKnight, Grant Hauer, Marty Luckert, Feng Qiu

Second-generation biofuel (e.g., ethanol, renewable diesel) can be made from crop residues. However, the availability of residues for biofuel production is uncertain, because farmers have the option to grow different crops and use the residues for alternative purposes, such as livestock bedding and feed, or leave them in the field to improve soil quality. Taking Canadian wheat straw supply as an example, we develop a dynamic programming model to investigate a farmer's wheat straw supply decision in response to different wheat straw and grain prices. Our model considers crop choices between wheat and canola in the context of disease risk, the trade-off between the immediate payoffs a farmer may receive from bailing and selling wheat straw, and the long-term adverse effects that removing wheat straw from the soil surface may have on wheat and canola yields. The results from this study provide insights into how farm-level supply decisions, in response to wheat straw price changes, affect soil quality dynamics and scale up to regional wheat straw supply for biofuel production. This information also has implications for land use change and the sustainability of feedstock supply for biofuels.

第二代生物燃料(如乙醇、可再生柴油)可由作物残留物制成。然而,用于生物燃料生产的秸秆供应情况并不确定,因为农民可以选择种植不同的作物,并将秸秆用作其他用途,如牲畜垫料和饲料,或留在田间改善土壤质量。以加拿大的小麦秸秆供应为例,我们建立了一个动态编程模型,研究农民在不同小麦秸秆和谷物价格下的小麦秸秆供应决策。我们的模型考虑了疾病风险背景下小麦和油菜籽之间的作物选择、农民从打捆和出售小麦秸秆中可能获得的直接收益之间的权衡,以及从土壤表层清除小麦秸秆可能对小麦和油菜籽产量产生的长期不利影响。这项研究的结果让我们深入了解了农场层面的供应决策如何根据小麦秸秆价格的变化影响土壤质量动态,并扩大到生物燃料生产的区域小麦秸秆供应。这些信息还对土地利用变化和生物燃料原料供应的可持续性产生了影响。
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引用次数: 0
Online food advertisements and the role of emotions in adolescents’ food choices 在线食品广告和情感在青少年食品选择中的作用
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-02-02 DOI: 10.1111/cjag.12353
Martina Vecchi, Linlin Fan, Sarah Myruski, Wei Yang, Kathleen L. Keller, Rodolfo M. Nayga Jr.

Adolescence is a critical period for future health outcomes. Food habits and cognitive development are underway, and it is a period of heightened sensitivity to external influences and emotional shifts. We experimentally test the individual and combined influence of food advertisements and emotional primes (i.e., positive, negative, neutral) on adolescent food choices. Participants completed a food choice task selecting five snacks out of twenty healthy and unhealthy options in an online experiment. Prior to the food choice, we randomized whether adolescents were exposed to unhealthy food or non-food online advertisements. To induce experimental variation in adolescents’ emotions, they were assigned to watch two, two-minute film clips validated to elicit the targeted emotion. The online food advertisement did not significantly impact food choices, except that Black and Hispanic groups selected a higher share of calories from unhealthy foods. Participants in a negative emotional state selected more unhealthy sweet snacks. Finally, we find only weak evidence that a positive emotional state amplified the impact of food advertisements on the nutritional quality of food selection. Together, results suggest that while a negative emotional state drives food choices, this pattern occurs independently from food advertisement exposure.

青春期是影响未来健康结果的关键时期。这一时期的饮食习惯和认知能力都在不断发展,对外界影响和情绪变化的敏感度也在不断提高。我们通过实验测试了食品广告和情绪预设(即积极、消极和中性)对青少年食物选择的单独和综合影响。在一项在线实验中,参与者完成了一项食物选择任务,从二十种健康和不健康的选择中选出五种零食。在选择食物之前,我们随机安排青少年接触不健康食品或非食品在线广告。为了诱发青少年的实验性情绪变化,我们安排他们观看两段两分钟的电影片段,这些片段经过验证能够诱发目标情绪。除了黑人和西班牙裔群体选择不健康食品的卡路里比例较高外,在线食品广告对食物选择并无明显影响。处于负面情绪状态的参与者选择了更多不健康的甜食。最后,我们发现只有微弱的证据表明,积极情绪状态扩大了食品广告对食品选择营养质量的影响。总之,研究结果表明,虽然消极情绪状态会驱使人们选择食物,但这种模式的出现与食品广告接触无关。
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引用次数: 0
Business risk management programs and the adoption of beneficial management practices in Canadian crop agriculture 加拿大作物农业的商业风险管理计划和采用有益的管理方法
IF 2.5 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-01-24 DOI: 10.1111/cjag.12349
Aaron De Laporte, Daniel Schuurman, Tristan Skolrud, Peter Slade, Alfons Weersink

Canada's agricultural business risk management (BRM) programs require significant public expenditure, with unclear consequences related to climate change adaptation and mitigation through the adoption of beneficial management practices (BMPs). This study examines the relationship between Canada's current suite of BRM programs and the adoption of practices that mitigate GHG emissions in crop agriculture. We review the impacts of agricultural insurance on climate adaptation and mitigation, identifying impacts on both the intensive and extensive margins of production. We consider five potential program modifications, including: (1) changes in producer insurance premiums in AgriInsurance for the adoption of practices that would decrease the actuarially fair insurance rate if they were properly incorporated in the calculation; (2) dedicated insurance products related to trials of specific BMPs; (3) adjustments to current programs to allow more whole-farm considerations and intercropping; (4) cross-compliance measures on AgriInvest tied to environmental education; and (5) reduced insurance coverage for unfavorable environmental practices. While the effects of these potential modifications remain uncertain, they will drive the data collection process necessary to ensure that Canada's BRM programs play an appropriate role in greenhouse-gas reducing BMP adoption and climate change adaptation and mitigation.

加拿大的农业经营风险管理(BRM)计划需要大量的公共开支,而通过采用有益的管理方法(BMPs)来适应和减缓气候变化的后果尚不明确。本研究探讨了加拿大当前的整套农业经营风险管理计划与在作物农业中采用温室气体减排措施之间的关系。我们回顾了农业保险对气候适应和减缓的影响,确定了对集约型和粗放型生产的影响。我们考虑了五种潜在的计划修改,包括:(1)农业保险中生产者保险费的变化,因为采用的做法如果适当纳入计算,将降低精算公平保险费率;(2)与特定 BMP 试验相关的专用保险产品;(3)调整当前计划,允许更多的整体农场考虑和间作;(4)农业投资中与环境教育相关的交叉合规措施;以及(5)减少不利环境做法的保险范围。虽然这些潜在修改的效果仍不确定,但它们将推动必要的数据收集过程,以确保加拿大的农业生物多样性管理计划在温室气体减排BMP采用以及适应和减缓气候变化方面发挥适当的作用。
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引用次数: 0
Do consumers care about clean labels? Willingness to pay for simple ingredient lists and front-of-package labels on beef and plant-based burgers 消费者关心清洁标签吗?愿意为牛肉和植物性汉堡的简单配料表和包装正面标签付费
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-01-22 DOI: 10.1111/cjag.12346
Darnell Holt, Peter Slade, Jill Hobbs

We use an online hypothetical discrete choice experiment to examine willingness to pay for two dimensions of a clean label: simple ingredient lists and front-of-package labels. Experimental subjects were asked to choose between beef burgers, plant-based burgers, and hybrid burgers made with beef and plant protein. The burgers had either a simple or complex ingredient list and could also be labeled as organic or an excellent source of protein. Subjects were divided into two treatments: a treatment in which ingredient lists were always visible, and a treatment in which the ingredient lists were only visible if subjects clicked on the product image (click treatment). Subjects were willing to pay a premium of $4.55–$5.58 for products with simple ingredient lists in the visible ingredient treatment (relative to base prices of $5.00 to $12.50). This premium was reduced to $1.82–$2.29 in the click treatment. Willingness to pay for the organic and excellent source of protein labels was considerably lower and was generally insignificant, ranging from -$0.17 (and statistically insignificant) to $0.73. Willingness to pay for simple ingredient lists and front-of-package labels were not correlated, suggesting that demand for these attributes does not stem from an underlying preference for clean labels.

我们通过一个在线假设离散选择实验来考察人们对清洁标签两个方面的支付意愿:简单的配料表和包装正面标签。实验对象被要求在牛肉汉堡、植物汉堡和牛肉与植物蛋白混合汉堡中做出选择。这些汉堡的配料表可以是简单的,也可以是复杂的,还可以标注为有机或优质蛋白质来源。受试者被分为两个处理:一个处理是配料表始终可见,另一个处理是只有当受试者点击产品图片时配料表才可见(点击处理)。在成分可见处理中,受试者愿意为成分列表简单的产品支付 4.55 美元至 5.58 美元的溢价(相对于 5 美元至 12.50 美元的基本价格)。在点击处理中,这一溢价降至 1.82 美元至 2.29 美元。对有机和优质蛋白质来源标签的支付意愿要低得多,而且一般不显著,从-0.17 美元(统计上不显著)到 0.73 美元不等。对简单配料表和包装正面标签的支付意愿并不相关,这表明对这些属性的需求并非源于对清洁标签的潜在偏好。
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引用次数: 0
The impact of COVID-19 on price transmission and price volatility in the Canadian beef supply chain COVID-19 对加拿大牛肉供应链价格传导和价格波动的影响
IF 2.5 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-01-22 DOI: 10.1111/cjag.12347
Yanan Zheng, Henry An, Meng Yang, Feng Qiu

The COVID-19 pandemic resulted in disruptions to the Canadian meat and livestock markets. While prices initially decreased, the shutdowns of beef packing plants led to a large reduction in the supply of beef and a corresponding increase in the wholesale price with ramifications along the entire supply chain. This study examines the effect of COVID-19 on price transmission and price volatility in the Canadian beef supply chain using monthly farmgate, wholesale, and retail price data covering the period from July 2005 to February 2022. We find evidence indicating that COVID-19 affected long-run price transmission from farmgate and wholesale markets to the retail market. Specifically, we find that the pandemic resulted in a 94.42 and 81.48% decrease in price transmission from the farmgate and wholesale market, respectively, to the retail market, indicating that higher prices at the wholesale level were not being passed on to consumers to the same extent. In the short run, we find asymmetric price adjustments and both direct and indirect volatility spillovers among the three levels of markets, implying strong market interactions across the beef supply chain. Overall, our results suggest the resiliency of the Canadian beef sector to COVID-19 shocks.

COVID-19 大流行导致加拿大肉类和牲畜市场混乱。虽然最初价格有所下降,但牛肉包装厂的停产导致牛肉供应量大幅减少,批发价格相应上涨,并对整个供应链产生影响。本研究利用 2005 年 7 月至 2022 年 2 月期间的月度农场交货价、批发价和零售价数据,研究了 COVID-19 对加拿大牛肉供应链中价格传导和价格波动的影响。我们发现的证据表明,COVID-19 影响了从农场和批发市场到零售市场的长期价格传导。具体而言,我们发现大流行导致从农场和批发市场到零售市场的价格传导分别下降了 94.42% 和 81.48%,这表明批发层面的较高价格并未在同等程度上传导给消费者。在短期内,我们发现三级市场之间存在不对称的价格调整以及直接和间接的波动溢出效应,这意味着整个牛肉供应链中存在强烈的市场互动。总体而言,我们的研究结果表明,加拿大牛肉行业对 COVID-19 的冲击具有较强的抵御能力。
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引用次数: 0
Spatial optimization of nutrient reduction measures on agricultural land to improve water quality: A coupled modeling approach 农田减养措施改善水质的空间优化:一个耦合模型方法
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-12-04 DOI: 10.1111/cjag.12342
Roy Brouwer, Rute Pinto, Jorge Garcia-Hernandez, Xingtong Li, Merrin Macrae, Predrag Rajsic, Wanhong Yang, Yongbo Liu, Mark Anderson, Louise Heyming

The objective of this study is to identify the optimal spatial distribution of Best Management Practices (BMPs) to reduce total phosphorus (TP) runoff from agricultural land in the largest Canadian watershed draining into Lake Erie, the Great Lake most vulnerable to eutrophication. BMP measures include reduced fertilizer application, cover crops, buffer strips, and the restoration of wetlands. Environmental SWAT model results feed into a spatial optimization procedure using two separate objective functions to distinguish between public BMP program implementation costs (PIC) on the one hand and farmers’ private pollution abatement costs (PAC) on the other hand. The latter account for the opportunity costs of land retirement and changing land productivity. PAC are initially lower than PIC but exceed the latter after 30% of the annual TP baseline load is eliminated. This suggests that under optimal conditions existing grant and incentive payments cover the economic costs farmers face up to a maximum of 30% of the baseline load reduction. Imposing further reductions of up to 40% results in a cost to farmers of almost $52 million per year. This is 45% higher than the optimal solution based on PIC and therefore not deemed incentive-compatible under the watershed's existing cost-sharing scheme.

本研究的目的是确定最佳管理实践(BMPs)的最佳空间分布,以减少加拿大最大的流域农业用地的总磷(TP)径流流入伊利湖,伊利湖是最易受富营养化影响的大湖。BMP措施包括减少施肥、覆盖作物、缓冲带和恢复湿地。利用两个独立的目标函数,将环境SWAT模型的结果输入到空间优化过程中,以区分公共BMP计划实施成本(PIC)和农民私人污染减排成本(PAC)。后者考虑了土地退休和土地生产力变化的机会成本。PAC最初低于PIC,但在消除30%的年度TP基线负载后超过PIC。这表明,在最理想的条件下,现有的补助金和激励付款可以覆盖农民面临的经济成本,最多可达基准负荷减少的30%。如果进一步减少40%,农民每年将损失近5200万美元。这比基于PIC的最优解决方案高出45%,因此在流域现有的成本分摊方案下不被认为是激励相容的。
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引用次数: 0
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Canadian Journal of Agricultural Economics-Revue Canadienne D Agroeconomie
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