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Beef and the Bottom Line: The Effect of Value-Added Certification on Feeder Cattle Profitability 牛肉与底线:增值认证对饲养牛盈利能力的影响
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-02-01 DOI: 10.1017/aae.2021.33
Ben Garber, J. Alwang, G. Norton, John Bovay
Abstract Data from 1,422 feeder cattle teleauction lots were used to assess the impacts on profitability of the Virginia quality assured (VQA) feeder cattle program. The analysis finds higher profits for VQA cattle due to their faster turnover and lower feed costs; however, certification does not have a significant effect on price received by producers. The analysis further suggests that the cost associated with production under VQA should be considered in addition to price effects studied in previous literature.
摘要采用1422个饲养牛电话拍卖标段的数据来评估弗吉尼亚州质量保证(VQA)饲养牛项目对盈利能力的影响。分析发现,VQA牛的利润更高,因为它们的周转更快,饲料成本更低;然而,认证对生产者收到的价格没有显著影响。分析进一步表明,除了先前文献研究的价格效应外,还应考虑VQA下与生产相关的成本。
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引用次数: 5
AAE volume 54 issue 1 Cover and Front matter AAE第54卷第1期封面和封面
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-02-01 DOI: 10.1017/aae.2022.9
Olga Isengildina Massa
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引用次数: 0
Pricing Rice Quality Attributes and Returns to Quality Upgrading in Sub-Saharan Africa 撒哈拉以南非洲稻米品质属性定价与品质升级回报
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-02-01 DOI: 10.1017/aae.2022.3
E. Twine, S. Ndindeng, G. Mujawamariya, K. Futakuchi
Abstract The study applies parametric and nonparametric estimation methods to determine hedonic prices of rice quality attributes, and a partial equilibrium model to determine the payoff to investing in quality improvement in five countries in Sub-Saharan Africa. Results indicate that consumers are willing to pay price premiums for head rice, slender grains, peak viscosity, parboiled rice, and rice sold in urban markets. However, they strongly discount amylose content, rice with impurities and imported rice. Investing in quality improvement through amylose content reduction leads to net welfare gains with a benefit-cost ratio of 47.86 and internal rate of return of 90%.
摘要本研究以撒哈拉以南非洲5个国家为研究对象,采用参数和非参数估计方法确定稻米品质属性的享乐价格,并采用部分均衡模型确定稻米品质改善投资的收益。结果表明,消费者愿意为在城市市场销售的稻米支付价格溢价,包括头米、细粒米、峰值粘度米、半熟米和大米。然而,直链淀粉含量、含杂质大米和进口大米的价格却大幅下降。通过降低直链淀粉含量进行质量改善投资,净福利收益为47.86,内部收益率为90%。
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引用次数: 5
Effect of Nuclear Power Plants on Local Crop Yields 核电站对当地作物产量的影响
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-01-21 DOI: 10.1017/aae.2021.32
Daniyar Zhumadilov
Abstract The growing prevalence of clean energy raises the question of possible associated externalities. This article studies the effects of nuclear power plant development (and, as a result, the increased amount of water in the atmosphere from evaporative cooling systems) on nearby crop yields and finds that an average nuclear power plant increases local soybean yields by 2 and corn yields by 1 percent. Considering the low elasticity of demand for these crops, the yield increases translate to annual net benefits of $229 million (2020 US dollars) – $317 million in losses to farmers and $546 million in benefits to consumers.
摘要清洁能源的日益普及引发了可能的相关外部性问题。本文研究了核电站的发展(以及蒸发冷却系统增加的大气水量)对附近作物产量的影响,发现一座核电站平均能使当地大豆产量增加2%,玉米产量增加1%。考虑到对这些作物的需求弹性较低,产量增长转化为2.29亿美元(2020年美元)的年度净收益——农民损失3.17亿美元,消费者受益5.46亿美元。
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引用次数: 0
Hunters’ Willingness to Pay to Avoid Processing Costs Associated with Harvesting Infected Game 猎人为避免与收获受感染游戏相关的处理成本而支付的意愿
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-01-10 DOI: 10.1017/aae.2021.26
Ram Adhikari, N. Poudyal, L. Muller, Chuck Yoest
Abstract We assessed hunters’ willingness to participate in a scheme to recover the costs associated with processing diseased game. The results indicated that fifty-one percent of the hunters in a region affected by chronic wasting disease are interested in such a scheme and willing to pay an average of $20 per animal. Their willingness to participate is affected by risk perception, hunting experience, use of processing services, and income. Further, establishing such a market-based scheme would be financially profitable to game processors and helpful to wildlife agencies interested in encouraging hunters’ harvest to reduce herds and facilitate effective disease surveillance.
摘要我们评估了猎人参与一项计划的意愿,以收回与处理患病游戏相关的成本。结果表明,在一个受慢性消耗性疾病影响的地区,51%的猎人对这种计划感兴趣,并愿意为每只动物平均支付20美元。他们的参与意愿受到风险感知、狩猎经验、加工服务的使用和收入的影响。此外,建立这样一个基于市场的计划将为游戏加工商带来财政利润,并有助于有兴趣鼓励猎人收割以减少畜群和促进有效疾病监测的野生动物机构。
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引用次数: 2
Risk Analysis of Australia’s Victorian Dairy Farms Using Multivariate Copulae 基于多元Copulae的澳大利亚维多利亚奶牛场风险分析
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-12-16 DOI: 10.1017/aae.2021.23
S. Godfrey, Ryan H. L. Ip, T. Nordblom
Abstract The study provides comparative risk analyses of Australia’s three Victorian dairy regions. Historical data were used to identify business risk and financial viability. Multivariate distributions were fitted to the historical price, production, and input costs using copula models, capturing non-linear dependence among the variables. Monte Carlo simulation methods were then used to generate cash flows for a decade. Factors that influenced profitability the most were identified using sensitivity analysis. The dairies in the Northern region have faced water reductions, whereas those of Gippsland and South West have more positive indicators. Our analysis summarizes long-term risks and net farm profits by utilizing survey data in a probabilistic manner.
摘要本研究对澳大利亚维多利亚州的三个乳制品地区进行了风险比较分析。历史数据用于确定业务风险和财务可行性。使用copula模型将多变量分布拟合到历史价格、生产和投入成本,捕捉变量之间的非线性相关性。然后使用蒙特卡罗模拟方法生成十年的现金流。使用敏感性分析确定了对盈利能力影响最大的因素。北部地区的奶牛场面临着水量减少的问题,而吉普斯兰和西南部的奶牛场则有更积极的指标。我们的分析以概率的方式利用调查数据总结了长期风险和农场净利润。
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引用次数: 3
Spatial Panel Models of Crop Yield Response to Weather: Econometric Specification Strategies and Prediction Performance 作物产量对天气响应的空间面板模型:计量经济学规范策略和预测性能
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-11-24 DOI: 10.1017/aae.2021.29
Seong D. Yun, B. Gramig
Abstract This study scrutinizes spatial econometric models and specifications of crop yield response functions to provide a robust evaluation of empirical alternatives available to researchers. We specify 14 competing panel regression models of crop yield response to weather and site characteristics. Using county corn yields in the US, this study implements in-sample, out-of-sample, and bootstrapped out-of-sample prediction performance comparisons. Descriptive propositions and empirical results demonstrate the importance of spatial correlation and empirically support the fixed effects model with spatially dependent error structures. This study also emphasizes the importance of extensive model specification testing and evaluation of selection criteria for prediction.
摘要本研究仔细审查了作物产量响应函数的空间计量模型和规范,为研究人员提供了对经验替代方案的有力评估。我们指定了14个作物产量对天气和场地特征响应的竞争面板回归模型。本研究利用美国的县玉米产量,实现了样本内、样本外和自举样本外的预测性能比较。描述性命题和实证结果证明了空间相关性的重要性,并实证支持具有空间相关误差结构的固定效应模型。本研究还强调了广泛的模型规范测试和预测选择标准评估的重要性。
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引用次数: 1
Marketing Fed Cattle Based on Expectations of the Underlying Carcass Value Dynamics 基于潜在胴体价值动态预期的饲牛营销
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-11-24 DOI: 10.1017/aae.2021.27
Madeline Poss, Kalyn T. Coatney, Daniel Rivera, T. Dinh, R. D. Little, J. Maples
Abstract Fed cattle profitability is determined by complicated dynamic processes of body growth, carcass development, and seasonal prices. A structural model is constructed to contend with all these dynamic processes to predict optimal market timing. Informed simulations are conducted and compared to those observed in the data, as well as to a previous model ignoring the evolution of carcass value. The results indicate that significant improvements to profitability are attainable with the new method. The results also indicate the opportunity cost of not accounting for carcass value, even with error, is more severe than when these dynamics are ignored.
饲料牛的盈利能力是由胴体生长、胴体发育和季节价格等复杂的动态过程决定的。构建了一个结构模型来应对所有这些动态过程,以预测最优市场时机。进行了知情的模拟,并与数据中观察到的结果以及忽略胴体价值演变的先前模型进行了比较。结果表明,采用新方法可以显著提高盈利能力。结果还表明,即使有误差,不考虑胴体价值的机会成本也比忽略这些动态时更严重。
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引用次数: 1
Regulatory Restrictions Across U.S. Protein Supply Chains 美国蛋白质供应链的监管限制
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-11-19 DOI: 10.1017/aae.2021.28
Aaron J. Staples, D. Chambers, Richard T. Melstrom, Trey Malone
Abstract Food regulations protect consumer health, mitigate environmental concerns, and promote animal welfare, but they can also hinder innovation, limit entrepreneurship, and generate higher consumer prices. This study examines the number of federal and state regulatory restrictions affecting the beef, pork, poultry, sheep, goat, and seafood industries, including processing, wholesale distribution, and retail sales. We also examine state regulatory heterogeneity associated with animal protein products. Our results suggest that protein supply chains have become subject to tens of thousands of regulatory constraints over the past half-century. We also find substantial heterogeneity in the number of state restrictions associated with animal production, indicative of large differences in the amount of administrative law across states. Results highlight that the patchwork approach of U.S. food policy creates overlapping, cumbersome guidelines for manufacturers, and given the interconnectivity of modern food supply chains, the framework can create additional hurdles for interstate commerce.
食品法规保护消费者健康,减轻环境问题,促进动物福利,但它们也可能阻碍创新,限制企业家精神,并产生更高的消费价格。本研究考察了影响牛肉、猪肉、家禽、绵羊、山羊和海鲜行业的联邦和州监管限制的数量,包括加工、批发分销和零售销售。我们还研究了与动物蛋白产品相关的国家监管异质性。我们的研究结果表明,在过去的半个世纪里,蛋白质供应链受到了成千上万的监管限制。我们还发现,各州与动物生产相关的限制数量存在很大差异,这表明各州行政法的数量存在很大差异。结果强调,美国食品政策的拼凑方法为制造商创造了重叠的,繁琐的指导方针,并且考虑到现代食品供应链的互联性,该框架可能会为州际贸易创造额外的障碍。
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引用次数: 3
Bayesian Hierarchical Models for Measuring Varietal Improvement in Tobacco Yield and Quality 衡量烟草产量和品质变化改善的贝叶斯层次模型
IF 1.9 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-11-01 DOI: 10.1017/aae.2021.25
A. Ramsey, R. Rejesus
Abstract We measure the economic impact of varietal improvement and technological change in flue-cured tobacco across quantity (e.g., yield) and quality dimensions under a voluntary quality constraint. Since 1961, flue-cured tobacco breeders in the United States have been subject to the Minimum Standards Program that sets limits on acceptable quality characteristics for commercial tobacco varieties. We implement a Bayesian hierarchical model to measure the contribution of breeding efforts to changes in tobacco yields and quality between 1954 and 2017. The Bayesian model addresses limited data for varieties in the trials and allows easy generation of the necessary parameters of economic interest.
在自愿质量约束下,我们从数量(如产量)和质量两个维度衡量了品种改良和技术变革对烤烟的经济影响。自1961年以来,美国的烤烟种植者一直受到最低标准计划的约束,该计划为商业烟草品种设定了可接受的质量特征限制。我们实施了贝叶斯层次模型来衡量1954年至2017年间育种努力对烟草产量和质量变化的贡献。贝叶斯模型处理试验中品种的有限数据,并允许容易地产生必要的经济利益参数。
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Journal of Agricultural and Applied Economics
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