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Nearly uniform prices of fresh produce products in US retail chains and implications 美国零售连锁店新鲜农产品价格几乎一致及其影响
Pub Date : 2024-04-23 DOI: 10.1002/jaa2.120
Xiao Dong, Gregory Astill

This study provides evidence that retail prices of US fresh produce (fruits and vegetables) and fresh meat products are similar across stores within the same chain even though unique characteristics of fresh produce products might lend to more localization in pricing. The results show the median price difference of fresh produce is 5% within-chain stores compared to 20% between-chain stores. Furthermore, the results show no significant differences in fresh produce prices between-chain stores that serve areas of differing food access nor significant differences in chain prices between Metropolitan Statistical Areas with implications to federal nutrition programs.

本研究提供的证据表明,美国新鲜农产品(水果和蔬菜)和新鲜肉类产品的零售价格在同一连锁店内各店之间相差无几,尽管新鲜农产品的独特性可能会使定价更加本地化。结果显示,连锁店内生鲜产品价格差异的中位数为 5%,而连锁店之间的差异为 20%。此外,结果表明,服务于不同食物获取地区的连锁店之间的生鲜产品价格没有明显差异,大都会统计区之间的连锁店价格也没有明显差异,这对联邦营养计划没有影响。
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引用次数: 0
Is environmental consciousness associated with organic food consumption?: A revealed preference approach 环境意识与有机食品消费相关吗?揭示偏好法
Pub Date : 2024-04-22 DOI: 10.1002/jaa2.119
Sungeun Yoon, Lisa House, Zhifeng Gao, Kelly Grogan, Conner Mullally

This study analyzes NielsenIQ household scanner data, exploring the environmental motivation behind organic food consumption using single-use plastics spending as a proxy for environmental concern. To investigate the relationship between the two environmental behaviors, organic food and single-use plastic, the study utilizes the instrumental variable approach to account for the potential endogeneity in revealed preference data. Results show a significant negative association between single-use plastic and organic food purchases, underscoring environmental concern as one of the motives for choosing organic foods. The findings indicate that organic food marketing should emphasize environmental benefits to appeal to environmentally conscious consumers.

本研究分析了尼尔森智商(NielsenIQ)家庭扫描数据,以一次性塑料消费作为环境问题的代表,探讨有机食品消费背后的环保动机。为了研究有机食品和一次性塑料这两种环保行为之间的关系,本研究采用了工具变量法来解释揭示偏好数据中潜在的内生性。结果显示,一次性塑料与有机食品购买之间存在明显的负相关,这突出表明环境问题是人们选择有机食品的动机之一。研究结果表明,有机食品营销应强调环境效益,以吸引具有环保意识的消费者。
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引用次数: 0
Effects of the added sugar labeling on consumers' willingness to pay: The case of cranberry products under different nutrition-related information treatments 添加糖标签对消费者支付意愿的影响:不同营养相关信息处理下的蔓越莓产品案例
Pub Date : 2024-04-22 DOI: 10.1002/jaa2.121
Xueying Ma, Rosa Karina Gallardo, Elizabeth Canales, Amaya Atucha, Juan Zalapa, Massimo Iorizzo

The Food and Drug Administration announced a rule update to the Nutrition Facts Panel (NFP) requiring the declaration of added sugars on the NFP starting in 2020. This study measures the impact of these changes by estimating the willingness to pay for added sugars in cranberry products under different nutrition-related information treatments. We found significant discounts for increases in added sugars that vary across information treatments and consumer subsamples. A positive information frame about the health benefits of cranberries was not found to consistently offset the impact of additional information on the recommended daily intake limits for added sugars.

美国食品和药物管理局宣布更新营养成分表(NFP)规则,要求从2020年开始在NFP上声明添加糖。本研究通过估算不同营养相关信息处理下蔓越莓产品中添加糖的支付意愿来衡量这些变化的影响。我们发现,在不同的信息处理方式和消费者子样本中,消费者对添加糖的增加有明显的折扣。关于蔓越莓健康益处的正面信息框架并不能持续抵消额外信息对添加糖每日建议摄入量限制的影响。
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引用次数: 0
Quality-related descriptors to increase fresh blueberries purchase—Evidence from a basket-based choice experiment 增加新鲜蓝莓购买量的质量相关描述--基于篮子选择实验的证据
Pub Date : 2024-04-01 DOI: 10.1002/jaa2.118
Xueying Ma, R. Karina Gallardo, Elizabeth Canales, Massimo Iorizzo

This study addresses the need to boost fruit and vegetable consumption amidst rising diet-related health concerns. Blueberries, rich in phenolic phytochemicals, offer significant health benefits. Using a basket-based choice experiment (BBCE), the study identifies sensory descriptors that enhance blueberry purchasing likelihood. Packaging with a “Stay Fresh” label reduces price sensitivity compared to others. Additionally, blueberries are commonly purchased alongside other berries rather than as substitutes. Demographic factors such as gender, age, education, employment, fitness, ethnicity, region, nutritional value perception, and budget influence blueberry selection. These insights can aid growers, retailers, and marketers in increasing fresh blueberry demand.

这项研究探讨了在与饮食相关的健康问题日益严重的情况下促进水果和蔬菜消费的必要性。蓝莓富含酚类植物化学物质,对健康大有裨益。通过基于篮子的选择实验(BBCE),该研究确定了提高蓝莓购买可能性的感官描述。与其他产品相比,带有 "保持新鲜 "标签的包装会降低价格敏感度。此外,蓝莓通常与其他浆果一起购买,而不是作为替代品。性别、年龄、教育程度、就业、体质、种族、地区、营养价值感知和预算等人口因素影响着人们对蓝莓的选择。这些见解有助于种植者、零售商和营销人员增加对新鲜蓝莓的需求。
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引用次数: 0
Preferences and willingness to pay for a novel carbon label: A choice experiment in the United States 对新型碳标签的偏好和支付意愿:美国的选择实验
Pub Date : 2024-03-29 DOI: 10.1002/jaa2.116
Wen Lin, Rodolfo M. Nayga Jr., Wei Yang

This study investigates how US consumers respond to and value a new technology-based carbon label on food products. Results indicate that individual valuation of the carbon-labeled bread is $4/20 oz, marginally lower than the valuation of the conventional and organic bread products. Moreover, individuals belonging to certain market segments, such as non-White, liberal, and well-educated consumers, and those having a high level of knowledge about the causes of climate change, exhibit a higher valuation for the novel carbon label.

本研究调查了美国消费者对食品上基于新技术的碳标签的反应和评价。结果表明,个人对碳标签面包的估价为 4 美元/20 盎司,略低于对传统和有机面包产品的估价。此外,属于某些细分市场的个人,如非白人、自由派和受过良好教育的消费者,以及对气候变化原因有较多了解的消费者,对新型碳标签表现出更高的评价。
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引用次数: 0
Efficiency and productivity growth in US food manufacturing industries: Exporters, ownership changes, and firm characteristics 美国食品制造业的效率和生产率增长:出口商、所有权变化和企业特征
Pub Date : 2024-03-29 DOI: 10.1002/jaa2.113
Pinar Celikkol Geylani

This study employs a stochastic production frontier framework to measure productivity growth among exporters, non-exporters, and firms experiencing ownership changes through mergers and acquisitions in US food manufacturing. Analyzing a panel data set that integrates Economic Censuses and transaction-level exports, the results reveal the coexistence of more productive exporters, driven by technical efficiency, alongside less productive non-exporters. Exporters in arm's length transactions show productivity growth driven by technical efficiency change, while those in related party transactions benefit mainly from technological change. Firms undergoing ownership changes exhibit positive productivity growth with a greater contribution from technical efficiency compared to those without such changes.

本研究采用随机生产前沿框架来衡量美国食品制造业中出口商、非出口商以及通过并购实现所有权变更的企业的生产率增长情况。通过分析整合了经济普查和交易层面出口的面板数据集,结果显示,在技术效率的驱动下,生产率较高的出口商与生产率较低的非出口商并存。正常交易中的出口商在技术效率变化的驱动下实现了生产率增长,而关联方交易中的出口商则主要受益于技术变革。与没有发生所有权变更的企业相比,发生所有权变更的企业生产率呈正增长,技术效率的贡献更大。
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引用次数: 0
Intertemporal comparison of cost and technical efficiencies using a base period approach for the Korean rice industry 用基期法对韩国水稻产业的成本和技术效率进行跨期比较
Pub Date : 2024-03-12 DOI: 10.1002/jaa2.117
Jeongseung Kim, Chanjin Chung

Objectives of our study are to develop a procedure for intertemporal comparison of both technical and cost efficiency and estimate farm efficiency for the Korean rice industry from 2003 to 2017. The newly developed base-year procedure excludes frontier shift and price effects from the standard procedure for intertemporal comparison. An adjusted central limit theorem for sample T-tests is applied to avoid potential bias from efficiency scores by the Data Envelope Analysis. Our empirical results show that the two procedures yield different scores and trends. The standard approach indicates declining efficiency, while the base-year method shows overall improvement in farm efficiency.

我们的研究目标是开发一种技术效率和成本效率的跨期比较程序,并估算 2003 年至 2017 年韩国水稻产业的农业效率。新开发的基年程序排除了跨时比较标准程序中的前沿转移和价格效应。为了避免数据包络分析法对效率评分可能产生的偏差,我们采用了调整后的样本 T 检验中心极限定理。我们的实证结果表明,两种程序得出了不同的得分和趋势。标准方法显示效率下降,而基年方法则显示农场效率整体提高。
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引用次数: 0
Does sin tax on the legal market facilitate the illicit market? An ex-ante assessment on the US cannabis market 对合法市场征收罪恶税是否会助长非法市场?对美国大麻市场的事前评估
Pub Date : 2024-03-07 DOI: 10.1002/jaa2.114
Joohun Han, Khondoker A. Mottaleb, John N. Ng'ombe, Alvaro Durand-Morat

Sin tax is essential to reduce the harm caused by products like cannabis. However, excessive taxation may facilitate illicit markets. We examine sin tax policies' impact on legal and illicit cannabis markets in the selected US states. Using a Constant Elasticity of Substitution utility framework, we assess scenarios like sin tax increase and anti-illicit cannabis policies. Our findings indicate high sin taxes may drive consumers to illicit markets, but anti-illicit market policies could control its extent. However, there is a trade-off between market size, tax revenue, consumers' utility, and illicit market control. Thus, optimizing sin tax policies is challenging, necessitating a second-best approach.

罪恶税对于减少大麻等产品造成的危害至关重要。然而,过度征税可能会助长非法市场。我们研究了美国部分州的罪恶税政策对合法和非法大麻市场的影响。利用恒定替代弹性效用框架,我们评估了增加罪恶税和打击非法大麻政策等方案。我们的研究结果表明,高额的罪恶税可能会促使消费者转向非法市场,但打击非法市场的政策可以控制其程度。然而,市场规模、税收、消费者效用和非法市场控制之间存在权衡。因此,优化罪恶税政策具有挑战性,必须采用次优方法。
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引用次数: 0
Adoption determinants of improved cassava varieties and intercropping among East and Central African smallholder farmers 东非和中非小农采用木薯改良品种和间作的决定因素
Pub Date : 2024-03-05 DOI: 10.1002/jaa2.112
Paul Mwebaze, Sarina Macfadyen, Paul De Barro, Anton Bua, Andrew Kalyebi, Irene Bayiyana, Fred Tairo, John Colvin

A key constraint to cassava productivity in Africa is the lack of adoption of improved cassava varieties tolerant to pests and diseases. To understand the drivers of adoption behavior, we examine the simultaneous adoption of improved cassava varieties and intercropping by 1200 smallholder farmers in Malawi, Tanzania, and Uganda. Using a linear model, we find that varietal characteristics, such as yield and early maturity, are critical drivers of adoption. Access to extension and credit is associated with an increase in the attractiveness of yield-improving characteristics. We conclude that a more targeted extension approach would increase technology adoption in these countries.

非洲木薯生产率的一个关键制约因素是缺乏采用抗病虫害的木薯改良品种。为了了解采用行为的驱动因素,我们研究了马拉维、坦桑尼亚和乌干达 1200 名小农同时采用木薯改良品种和间作的情况。通过线性模型,我们发现产量和早熟等品种特性是采用木薯的关键驱动因素。获得推广和信贷与提高产量特征的吸引力增加有关。我们的结论是,更有针对性的推广方法将提高这些国家的技术采用率。
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引用次数: 0
Bias in economic evaluation of variable rate application based on geographically weighted regression models with misspecified functional form 基于地理加权回归模型的变率应用经济评价中的偏差,其功能形式存在误差
Pub Date : 2024-03-04 DOI: 10.1002/jaa2.102
Taro Mieno, Xiaofei Li, David S. Bullock

Geographically weighted regression (GWR) has been presented as a valuable tool for estimating site-specific yield response functions to derive recommendations of variable rate input. This study employs Monte Carlo simulations to illustrate that if GWR assumes a quadratic yield response functional form while the actual yield-input relationship is quadratic-plateau, it can significantly overestimate the economic value of variable rate application compared to its true value. Practitioners in precision agriculture should exercise caution when utilizing GWR for site-specific input recommendations. Statistical community is also encouraged to develop tools in software packages providing GWR that allow more flexibility in functional form assumptions.

地理加权回归(GWR)被认为是估算特定地点产量响应函数的重要工具,可用于推导变率投入的建议。本研究采用蒙特卡洛模拟说明,如果 GWR 假设产量响应函数形式为二次方,而实际产量-投入关系为二次方-高原,那么与真实值相比,GWR 会大大高估变率施肥的经济价值。精准农业从业人员在利用 GWR 提出特定地点的投入建议时应谨慎行事。我们还鼓励统计界在提供 GWR 的软件包中开发工具,使函数形式假设更具灵活性。
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引用次数: 0
期刊
Journal of the Agricultural and Applied Economics Association
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