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An Empirical Examination of BuyBox Assignments in Online Grocery Retail 在线杂货零售业购买箱分配的实证研究
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-09-19 DOI: 10.1002/agr.21978
Chinonso E. Etumnu, Trey Malone
In Amazon's marketplaces across the globe, multiple sellers sell the same product, leading Amazon to introduce BuyBox. This box‐like feature, located on the top‐right corner of product pages, prominently displays a single seller at a given time. Using a choice model and a panel dataset of over 290,000 unique grocery products from five countries, our study investigates the key factors that influence BuyBox assignments. We found that winning the BuyBox is primarily determined by competitive pricing—being the lowest‐price seller for a 180‐day period significantly improves the chances of a BuyBox assignment. Furthermore, maintaining low current product prices, low sales ranks, and minimal out‐of‐stock percentages are crucial in becoming a BuyBox seller. These findings affect Amazon and its extensive network of over 2 million third‐party sellers, who navigate the increasingly competitive and dynamic E‐commerce landscape.
在亚马逊的全球市场上,多个卖家销售同一种产品,因此亚马逊推出了 BuyBox。这种类似盒子的功能位于产品页面的右上角,在特定时间内突出显示单个卖家。我们的研究利用选择模型和来自五个国家超过 29 万种独特杂货产品的面板数据集,调查了影响 BuyBox 分配的关键因素。我们发现,赢得 BuyBox 主要取决于有竞争力的定价--在 180 天内成为价格最低的卖家能显著提高获得 BuyBox 分配的机会。此外,保持较低的当前产品价格、较低的销售排名和最低的缺货率也是成为 BuyBox 卖家的关键。这些发现对亚马逊及其由 200 多万第三方卖家组成的庞大网络产生了影响,这些卖家在竞争日趋激烈、充满活力的电子商务领域中游刃有余。
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引用次数: 0
Who Is a Better Bargainer? 谁更会讨价还价?
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-09-17 DOI: 10.1002/agr.21980
Linling Geng
This study introduces a sophisticated model for evaluating bargaining power within the agricultural production service market, using data from China's Land Economy Survey and the bilateral stochastic frontier model. The findings indicate: (1) Suppliers elevate prices by 26.77% above the benchmark, while demanders reduce them by 24.36%, culminating in a market price that surpasses the benchmark. (2) Labor outflow and aging populations drive suppliers to further increase market prices. (3) Variations in individual characteristics underpin the disparity in bargaining power between suppliers and demanders. The study underscores the disadvantaged and heterogeneous nature of farmers (demanders), advocating for a recalibration of subsidy distribution to benefit farmers directly, rather than agricultural production service organizations, and the establishment of differentiated subsidy systems.
本研究利用中国土地经济调查数据和双边随机前沿模型,引入了一个评估农业生产服务市场议价能力的复杂模型。研究结果表明:(1) 供应商在基准价格基础上抬高 26.77%,而需求方则降低 24.36%,最终市场价格超过基准价格。(2) 劳动力外流和人口老龄化促使供应商进一步提高市场价格。(3) 个人特征的差异是供需双方议价能力差异的基础。研究强调了农民(需求者)的弱势和异质性,主张重新调整补贴分配,使农民直接受益,而不是农业生产服务组织,并建立差异化的补贴制度。
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引用次数: 0
Assessing the Impacts of Compost‐Bedded Pack Barns on the Productive Efficiency of Brazilian Dairy Farms 评估堆肥垫式畜舍对巴西奶牛场生产效率的影响
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-09-13 DOI: 10.1002/agr.21979
Marcelo Dias Paes Ferreira, Andre Rozemberg Peixoto Simões, Lindomar Pegorini Daniel, Charles Frederick Nicholson
The objective of this study was to evaluate differences in the technical efficiency of alternative milk production systems on Brazilian farms. Using a panel from 2014 to 2021 (1117 observations of 383 dairy farms) we compare the technical efficiency of more recently adopted Compost‐bedded Pack Barns (CPB) with that of Semi‐confinement (SC), and Unstructured confinement (UNS) systems. A stochastic frontier was estimated by a Generalized True Random Effects to assess the relationship between technical efficiency and the production systems adopted, decompose efficiency into Transient (short‐term) and Persistent (long‐term) components, and control for unobserved heterogeneity. We found that farms using confined systems are more efficient than those using semi‐confined systems. The decomposition of the Overall Technical Efficiency in its Persistent and Transient components suggests that farmers can be more efficient when dealing with short‐term shocks than when deciding which system to use. The use of more capital‐intensive technologies such as CPB may provide opportunities to improve dairy farm profitability and productivity growth in Brazil.
本研究旨在评估巴西牧场替代牛奶生产系统的技术效率差异。我们利用 2014 年至 2021 年的面板数据(对 383 个奶牛场的 1117 个观测值),比较了最近采用的堆肥垫式挤奶牛舍(CPB)与半圈养(SC)和非结构化圈养(UNS)系统的技术效率。采用广义真实随机效应估算随机前沿,以评估技术效率与所采用的生产系统之间的关系,将效率分解为瞬时(短期)和持久(长期)两部分,并控制未观察到的异质性。我们发现,采用封闭系统的农场比采用半封闭系统的农场效率更高。将总体技术效率分解为持续和瞬时两个部分表明,农民在应对短期冲击时比决定使用哪种系统时更有效率。使用 CPB 等资本密集型技术可为提高巴西奶牛场的盈利能力和生产率增长提供机会。
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引用次数: 0
Analyzing individual rent price ratios in eastern German agricultural land markets: A GAMLSS approach 分析德国东部农业用地市场的个别租金价格比:GAMLSS 方法
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-09-03 DOI: 10.1002/agr.21976
Marius Michels, Cord‐Friedrich von Hobe, Miryam Sarah Merk, Thomas Kneib, Oliver Musshoff
This study explores the rent price ratio in agricultural land markets, crucial for evaluating market efficiency, policy needs, and farmer decision‐making. Traditionally, the analyses faced challenges due to the absence of concurrent sale and rent data for the same land, potentially leading to biased results. This research avoids this problem by utilizing a unique dataset from Eastern Germany, encompassing auction data from 2016 to 2019. This dataset is distinctive, containing both the purchase and lease price offers by individual farmers for the same agricultural land at a single point. Thus, this study overcomes the conventional limitations of using aggregated or non‐contemporaneous data. Hence, the focal point is to unravel the intricate relationship between individual rent price ratios and a myriad of influencing factors, including land characteristics and local farming structures. The use of Generalized Additive Models for Location, Shape, and Scale provides a robust framework for this analysis, offering a nuanced understanding of the distributional properties of individual rent price ratios. The study provides robust empirical evidence that highlights the need for adaptive and region‐specific policies if policy makers insist on intervening in the agricultural land market. Furthermore, promising points of departure for future research are identified. [EconLit Citation: Q15].
本研究探讨了农业用地市场的租金价格比,这对评估市场效率、政策需求和农民决策至关重要。传统上,由于缺乏同一块土地的同期销售和租金数据,分析面临挑战,可能导致结果偏差。本研究利用德国东部的独特数据集,涵盖了 2016 年至 2019 年的拍卖数据,从而避免了这一问题。该数据集与众不同,包含了单个农户在一个点上对同一块农用地的购买和租赁价格报价。因此,本研究克服了使用汇总数据或非同期数据的传统局限性。因此,研究的重点在于揭示个体租金价格比与众多影响因素(包括土地特征和当地农业结构)之间错综复杂的关系。使用位置、形状和规模的广义加性模型为这一分析提供了一个稳健的框架,使人们对单个租金价格比的分布特性有了细致入微的了解。这项研究提供了有力的经验证据,突出表明如果决策者坚持干预农业用地市场,就需要制定适应性政策和针对特定地区的政策。此外,研究还为今后的研究确定了有前景的出发点。[经济学引文:Q15]。
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引用次数: 0
Estimation and determinants of transient and persistent efficiency of rice production in Spain 西班牙水稻生产瞬时和持续效率的估算和决定因素
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-26 DOI: 10.1002/agr.21975
Juan Hernán Cabas Monje, Ricardo‐Andrés Troncoso Sepulveda, Bouali Guesmi, Ibtissem Taghouti, José María Gil
Rice is a basic component in the diet of more than half of the world's population, with 95% of its production destined for human consumption. Spain is the second rice producer in the European Union (EU), geographically located in four autonomous communities contributing to the local economy. This study aims at assessing the productive efficiency of rice farms in this country. To our knowledge, no previous work has dealt with the performance of rice framers in the EU in general and in Spain in particular. We used the Generalized True Ramdom‐effects model to estimate the persistent and transient efficiency levels of farms and identifying the production risk factors using a sample of 158 rice farms over the period 2014–2017. Empirical findings reveal an overall efficiency level of 0.81 on average, mainly explained by the long‐term efficiency component. Moreover, results show an important room for efficiency improvement at the short‐term to enhance productive management skills of farmers. Finally, labor, fertilizer, water and insurance spending are likely to be risk‐decreasing factors. [EconLit Citations: C13, D22, Q12].
大米是世界上一半以上人口饮食的基本组成部分,其产量的 95% 供人类食用。西班牙是欧盟(EU)第二大水稻生产国,在地理上分布在四个自治区,为当地经济做出了贡献。本研究旨在评估该国水稻农场的生产效率。据我们所知,此前没有任何研究涉及欧盟,特别是西班牙水稻种植者的绩效。我们使用广义真拉姆多姆效应模型,以 2014-2017 年期间的 158 个水稻农场为样本,估算了农场的持续和瞬时效率水平,并识别了生产风险因素。实证结果显示,总体效率水平平均为 0.81,主要由长期效率部分解释。此外,研究结果表明,为提高农民的生产管理技能,短期效率还有很大的提升空间。最后,劳动力、肥料、水和保险支出可能是降低风险的因素。[经济学引文:C13、D22、Q12]。
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引用次数: 0
Wheat seed delivery pathways and varietal turnover in eastern India 印度东部的小麦种子运送途径和品种更替
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-22 DOI: 10.1002/agr.21971
Vijayalaxmi D. Khed, Moti Jaleta, Vijesh V. Krishna
Why do certain new crop varieties fail to gain popularity among farmers despite their proven superiority in scientific field trials and on‐farm demonstrations? Empirical microlevel studies in agricultural economics usually address this question from a household or farmer perspective, neglecting the broader socio‐institutional and economic context against which varietal dissemination takes place. In the present study, we explore the relationship between wheat seed delivery networks and varietal turnover, using data from farmers' fields in eastern India. An extensive survey encompassing 7648 wheat farmers was conducted to capture wheat production practices across 31 districts of Bihar and 9 districts of eastern Uttar Pradesh. Additional qualitative interviews led to the initial impression that farmers' selection of varieties often precedes their choice of seed source, challenging the prevailing assumptions about the causal direction of this relationship. To address the challenge of reverse causality between varietal selection and seed source preference, we employed an instrumental variable regression framework. Although new wheat varieties are available in the market, a substantial majority of farmers opt for old ones. Farmers' decisions regarding the selection of wheat varieties and seed sources are not straightforward, and their preference for wheat varieties significantly impacts their seed source selection, indicating a hitherto unexplored bidirectional relationship. Understanding this complex relationship has significant strategic implications for stakeholders in the seed supply system, offering policy recommendations for enhancing varietal turnover rates and encouraging the widespread adoption of new, improved varieties among smallholders. Such initiatives hold the promise of enhancing system resilience and food security in developing countries. [EconLit Citations: O3, Q1, Q16, Q18].
为什么某些农作物新品种在田间科学试验和农场示范中被证明具有优越性,但却得不到农民的欢迎?农业经济学中的微观经验研究通常从家庭或农民的角度来探讨这个问题,而忽视了品种传播所处的更广泛的社会制度和经济背景。在本研究中,我们利用印度东部农民田间的数据,探讨了小麦种子交付网络与品种更替之间的关系。我们对比哈尔邦 31 个县和北方邦东部 9 个县的 7648 名小麦种植户进行了广泛调查,以了解他们的小麦生产实践。额外的定性访谈得出的初步印象是,农民对品种的选择往往先于他们对种子来源的选择,这对有关这种关系因果方向的普遍假设提出了挑战。为了解决品种选择与种子来源偏好之间的反向因果关系这一难题,我们采用了工具变量回归框架。虽然市场上有小麦新品种,但绝大多数农民还是选择老品种。农民在选择小麦品种和种子来源方面的决策并不简单,他们对小麦品种的偏好极大地影响了他们对种子来源的选择,这表明这是一种迄今为止尚未探索过的双向关系。了解这种复杂的关系对种子供应系统的利益相关者具有重要的战略意义,可为提高品种周转率和鼓励小农广泛采用改良新品种提供政策建议。这些举措有望增强发展中国家的系统复原力和粮食安全。[经济学引文:O3、Q1、Q16、Q18]。
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引用次数: 0
The impact of adopting sustainable agricultural practices with or without chemical pesticides on farmers' technical efficiency: Evidence from rural Burkina Faso 采用或不采用化学农药的可持续农业实践对农民技术效率的影响:来自布基纳法索农村的证据
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-22 DOI: 10.1002/agr.21974
Tobignaré Florent Maré, Pam Zahonogo, Kimseyinga Savadogo
This study analyzes the impact of adopting sustainable agricultural practices (SAPs) with or without chemical pesticides on farmers' technical efficiency. We compared three groups of farmers: nonadopters, those adopting SAPs and using chemical pesticides, and those adopting SAPs in the pesticide‐free mode. The study data covered 1912 rural households in Burkina Faso for the 2016–2017 agricultural season. We used an endogenous frontier model and a matching method to address sample selection for both observables and unobservables. The results show that the adoption of pesticide‐free SAPs reduces technical inefficiency compared with the practice of adopting SAPs with pesticides and nonadoption of SAPs. However, our findings show that compared with the nonadoption of SAPs, adoption of SAPs with chemical pesticides did not have a significant effect on technical efficiency. For more efficient and sustainable agriculture, policies should further promote SAPs while advancing biological pest management techniques, as opposed to the use of chemical pesticides. [EconLit Citations: Q1, Q12, Q15, Q16, Q56].
本研究分析了采用或不采用化学农药的可持续农业实践(SAP)对农民技术效率的影响。我们对三组农民进行了比较:非采用者、采用 SAP 并使用化学农药的农民和采用 SAP 无农药模式的农民。研究数据涵盖布基纳法索 2016-2017 年农季的 1912 个农村家庭。我们使用了内生前沿模型和匹配方法来解决可观测变量和不可观测变量的样本选择问题。结果表明,与采用含农药的农业结构调整方案和不采用农业结构调整方案的做法相比,采用不含农药的农业结构调整方案降低了技术无效率。然而,我们的研究结果表明,与不采用结构调整方案相比,采用含化学农药的结构调整方案对技术效率没有显著影响。为了提高农业的效率和可持续发展,政策应进一步推广 SAP,同时推进病虫害生物防治技术,而不是使用化学农药。[经济学引文:问题 1、问题 12、问题 15、问题 16、问题 56]。
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引用次数: 0
Determinants of local food producer participation in state‐sponsored marketing programs: Evidence from Missouri 当地食品生产商参与州资助营销计划的决定因素:密苏里州的证据
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-14 DOI: 10.1002/agr.21973
Lan Tran, Ye Su, Laura McCann
This study examines producer participation choices considering a variety of potential benefits linked to state‐sponsored marketing programs, using a real choice dataset of farmers in Missouri. Multinomial logit models are employed to predict determinants of farmer enrollment in three tiers of the Missouri Grown local food marketing program: free, $50, and $100 memberships. We find that farmers who expect to increase sales or receive special services from the program are more likely to choose paid membership levels, while those who seek new opportunities are more associated with free participation. Furthermore, farms with annual sales above $150,000 and those with male or white decision‐makers are more likely to be $100 members, while young and beginning farmers tend to participate at a paid tier of $50 in the program.
本研究利用密苏里州农民的真实选择数据集,考察了生产者在考虑到与州资助的营销计划相关的各种潜在利益的情况下的参与选择。本研究采用多叉 Logit 模型来预测农民加入密苏里州 "本地食品种植 "营销计划三个级别(免费、50 美元和 100 美元会员资格)的决定因素。我们发现,那些期望增加销售额或从该计划中获得特殊服务的农场主更倾向于选择付费会员级别,而那些寻求新机会的农场主则更倾向于免费会员级别。此外,年销售额超过 15 万美元的农场以及决策者为男性或白人的农场更有可能成为 100 美元会员,而年轻和新手农民则倾向于参加 50 美元的付费会员。
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引用次数: 0
Consumption patterns of fresh and frozen chicken: A Ghanaian food policy perspective 新鲜鸡肉和冷冻鸡肉的消费模式:加纳食品政策视角
IF 3.2 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-14 DOI: 10.1002/agr.21972
Francis Tsiboe, Mark Appiah‐Twumasi, Tian Xia, Vincent Amanor‐Boadu
Despite the global increase in poultry consumption, there are different preferences for chicken products in different countries. In Ghana, two main categories dominate the market: live/fresh whole chickens and imported frozen chicken parts. This study leverages data from 13,201 households to explore Ghanaian demand dynamics for these products using the Quadratic Almost Ideal Demand System. Findings reveal stark differences between the two. Live/fresh whole chickens, considered luxury goods, display a complex interplay with other non‐chicken meat products, cultural festivities, and various sociodemographic factors. Meanwhile, frozen chicken parts, seen as necessities, exhibit different demand shifters and peak consumption periods. Importantly, these two categories emerge as distinct products, signaling to policymakers the need for differentiated strategies. Simulated policy scenarios further emphasize that reducing prices of live/fresh chickens significantly boosts domestic chicken demand more than policies raising prices of frozen parts. However, the broader implications on alternative protein sources differ between the two policy types. We urge policymakers to adopt an integrated approach, considering these nuances, to strengthen Ghana's domestic poultry sector without unintended market disruptions. [EconLit citations: Q11, Q13, Q17, Q18, D12].
尽管全球家禽消费量增加,但不同国家对鸡肉产品的偏好各不相同。在加纳,有两大类产品在市场上占据主导地位:活鸡/新鲜整鸡和进口冷冻鸡肉部分。本研究利用来自 13201 个家庭的数据,采用二次几乎理想需求系统探讨加纳人对这些产品的需求动态。研究结果显示了这两种产品之间的明显差异。活鸡/新鲜整鸡被视为奢侈品,与其他非鸡肉产品、文化节日和各种社会人口因素之间存在复杂的相互作用。与此同时,被视为必需品的冷冻鸡肉部分则表现出不同的需求转移和消费高峰期。重要的是,这两类鸡肉作为不同的产品出现,表明政策制定者需要采取不同的策略。模拟的政策情景进一步强调,降低活鸡/新鲜鸡价格比提高冷冻部分价格的政策更能显著促进国内鸡肉需求。然而,两种政策类型对替代蛋白质来源的广泛影响是不同的。我们敦促政策制定者在考虑这些细微差别的同时采取综合方法,在不对市场造成意外干扰的情况下加强加纳国内家禽业的发展。[经济文献引用:Q11, Q13, Q17, Q18, D12]。
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引用次数: 0
Foreign labor, peer‐networking and agricultural efficiency in the Italian dairy sector 意大利奶业的外籍劳工、同行网络和农业效率
IF 2.1 3区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2024-08-10 DOI: 10.1002/agr.21970
Federico Antonioli, Simone Severini, M. Vigani
While the presence of immigrants in the agricultural sector is widely acknowledged, the empirical evidence on its economic consequences is lacking, especially from a microeconomic perspective. Using the Farm Accountancy Data Network panel data for Italian dairy farms in the period 2008–2018, the present study investigates the relationship between foreign workforce and farm– technical efficiency, considering the workers' country of origin. We rely on different peer‐network theories, and using a stochastic frontier analysis accounting for the endogeneity of immigrant labor force. Results point to the general positive contribution of immigrants on Italian farms' efficiency, while unpaid family labor exerts a null‐to‐negative influence. We detected an important effect of peer‐working, namely complementary task specialization and conformity behavior, with diverse groups of workers associated to different efficiency levels. The evidence of the positive correlation between immigrants and the efficiency of the agricultural sector has significant implications for the design of immigration policies and the access to domestic agri‐food markets, especially for those sectors in higher labor demand, as well as speeding up the process of economic and social integration of the labor force. [EconLit citations: Q12, Q18, J61, C23, C26].
虽然移民在农业部门的存在已得到广泛承认,但有关其经济后果的实证证据却很缺乏,特别是从微观经济角度来看更是如此。本研究利用 2008-2018 年期间意大利奶牛场的农场会计数据网络面板数据,在考虑工人原籍国的情况下,研究了外国劳动力与农场技术效率之间的关系。我们依据不同的同行网络理论,采用随机前沿分析法,考虑了移民劳动力的内生性。结果表明,移民对意大利农场的效率普遍有积极贡献,而无报酬的家庭劳动则产生了零到负的影响。我们发现了同伴工作的重要影响,即互补的任务专业化和服从行为,不同的工人群体与不同的效率水平相关联。移民与农业部门效率之间正相关的证据对于制定移民政策和进入国内农业食品市场(尤其是那些劳动力需求较高的部门)以及加快劳动力的经济和社会融合进程具有重要意义。[EconLit引文:Q12, Q18, J61, C23, C26]。
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引用次数: 0
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