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Labor shortages and agricultural trucking rates 劳动力短缺和农用卡车运费
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-05-07 DOI: 10.1111/cjag.12358
Timothy J. Richards, Zachariah Rutledge, Marcelo Castillo

In the United States, truck rates for perishable food, the per-mile rate charged for trucking services to move perishable food from farms to stores, rose substantially in the post-COVID-19 pandemic era. We argue that rising truck rates is a signal of a broader shortage of truckers, but the connection between labor shortages, rising truck rates, and a lack of trucking services has yet to be established empirically. In this paper, we develop an empirical examination based on an equilibrium job search, matching, and bargaining framework in which we estimate the role of labor shortages in accelerating driver-wage growth, and truck rates for agricultural products. We estimate the model by combining US Bureau of Census Current Population Survey data on truck driver wages with USDA-Agricultural Marketing Service Service data on truck rates to establish the linkage between trucker supply and the demand for trucking services. We find that the COVID-19 pandemic was responsible for a rise in for-hire trucker wages of some 38%$38%$, a rise in average truck rates of nearly 50%$50%$ and that the gap between trucker-job openings and successful matches explains a significant, but small, rise in truck rates.

在美国,易腐食品的卡车费率,即把易腐食品从农场运到商店的卡车运输服务的每英里费率,在后 COVID-19 大流行时代大幅上升。我们认为,卡车运价上涨是卡车司机普遍短缺的信号,但劳动力短缺、卡车运价上涨和卡车运输服务缺乏之间的联系尚未通过实证研究得到证实。在本文中,我们基于均衡求职、匹配和讨价还价框架进行了实证研究,估计了劳动力短缺在加速司机工资增长和农产品卡车运价上涨中的作用。我们结合美国人口普查局当前人口调查的卡车司机工资数据和美国农业部农业营销服务局的卡车运价数据对模型进行了估计,以建立卡车司机供应与卡车运输服务需求之间的联系。我们发现,COVID-19 大流行导致雇佣卡车司机工资上涨了一些,卡车平均费率上涨了近一些,卡车司机职位空缺与成功匹配之间的差距解释了卡车费率的大幅上涨,但幅度较小。
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引用次数: 0
Method myopia 近视方法
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-05-05 DOI: 10.1111/cjag.12348
Alan P. Ker

Method myopia is defined as theoretical rhetoric absent empirical discernment regarding flavor-of-the-day econometric methodologies. This Fellows Address discusses why method myopia is pervasive, what factors contribute to the pervasiveness, why is likely it to increase, and finally, a possible remedy. To that end, incentive structures facing researchers, reviewers, and editors are considered within the life-cycle of a typical econometric methodology. Considering our discipline is empirically driven, there are potentially large costs by using flavor-of-the-day methodologies when an alternative -- possibly leading to different economic results and policy responses -- is the appropriate method. Furthermore, method myopia can notably restrict the set of research problems examined thereby creating additional, potentially large, opportunity costs. Finally, over-selling the superiority/completeness/correctness of results from such flavor-of-the-day methodologies to policy makers can not only be costly in the particular case, but can undermine the long-term credibility of our disciplinary advice to policy makers.

方法近视被定义为对时下流行的计量经济学方法缺乏经验鉴别力的理论空谈。本研究报告讨论了方法近视为何普遍存在、哪些因素导致了方法近视的普遍存在、方法近视为何有可能加剧,以及最后可能的补救措施。为此,我们将在典型计量经济学方法论的生命周期内考虑研究人员、审稿人和编辑所面临的激励结构。考虑到我们的学科是以经验为驱动力的,因此,当另一种方法--可能导致不同的经济结果和政策反应--是合适的方法时,使用时下流行的方法可能会带来巨大的成本。此外,方法近视会明显限制研究问题的范围,从而产生额外的、潜在的巨大机会成本。最后,向政策制定者过度推销这种时髦方法所得出结果的优越性/完整性/正确性,不仅会在特定情况下付出高昂代价,而且会损害我们向政策制定者提供的学科建议的长期可信度。
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引用次数: 0
Price pass-through in the U.S. beef industry: Implications of feedlot capacity utilization 美国牛肉业的价格传递:饲养场产能利用率的影响
IF 2.5 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-05-01 DOI: 10.1111/cjag.12357
Melissa G. S. McKendree, Glynn T. Tonsor, Zekuan Dong

Transmission of prices, profits, and more generally, economic well-being across vertically connected sectors of agriculture have a long history of interest—arguably of most current interest in meat and livestock markets. Disruptions in live animal harvesting, especially from COVID-19, have corresponded with substantial market adjustment and hence elevated interest in inner-industry relationships, including from policymakers. This paper's main contribution is assessing how price changes in the U.S. feedlot industry manifest in feeder cattle markets. We use Ricardian rent theory as a framework to quantify price transmission by testing how price fluctuations actually pass through the supply chain versus theoretical expectations. We posit that the capacity utilization of feedlots changes because of market shocks, impacting price relationships. In the empirical model, when feedlot capacity utilization rates are below the 65% critical point, we find that both fed to feeder cattle and corn to feeder cattle pass-through rates are higher than hypothesized. When feedlot capacity utilization rates are high (>65%), estimated pass-through rates are lower and not statistically different from Ricardian rent theory. Understanding how prices pass through in the beef industry can help inform policy discussions about beef market competitiveness and promote efficient resource allocation.

价格、利润以及更广泛意义上的经济福利在纵向相连的农业部门之间的传递长期以来一直备受关注,可以说目前肉类和牲畜市场最令人关注。活畜收获的中断,尤其是 COVID-19 引起的中断,伴随着市场的大幅调整,从而提升了包括政策制定者在内的人们对行业内部关系的兴趣。本文的主要贡献在于评估了美国饲养场行业的价格变化如何体现在饲养牛市场上。我们以李嘉图租金理论为框架,通过检验价格波动在供应链中的实际传导情况与理论预期,对价格传导进行量化。我们认为,饲养场的产能利用率会因市场冲击而发生变化,从而影响价格关系。在实证模型中,当饲养场产能利用率低于 65% 临界点时,我们发现饲料到饲养牛和玉米到饲养牛的传递率都高于假设。当饲养场产能利用率较高(65%)时,估计的转嫁率较低,与李嘉图租金理论在统计上没有差异。了解牛肉产业的价格传递方式有助于为有关牛肉市场竞争力的政策讨论提供信息,并促进有效的资源分配。
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引用次数: 0
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
期刊
Canadian Journal of Agricultural Economics-Revue Canadienne D Agroeconomie
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