CJAE 《加拿大农业经济期刊》2025年第73卷第3期目录及摘要
官网链接： https://onlinelibrary.wiley.com/toc/17447976/2025/73/3Canadian Journal of Agricultural Economics
2025年第73卷第3期目录及摘要
目录 (Table of Contents)
Soda taxes versus cup sizes when the retailer practices nonlinear pricing: An experiment含糖饮料税与杯型限制：当零售商实行非线性定价时的实验比较José G. Nuño-Ledesma, Steven Y. Wu, Joseph V. BalagtasAssessing differential impacts of a trade agreement using a quantile regression approachGood co-op, bad co-op: Financing cooperatives with debt and retained earnings under asymmetric information合作社好坏之分：信息不对称下债务和留存收益的合作社融资Julien Cadot, Arnaud FeralClassifying agricultural risk management strategies: A cluster analysis approachMarius Michels, Hendrik Wever, Tim Ölkers, Jonas Adrian Rieling, Richard Barenbräuker, Oliver MußhoffDoes the use of information and communication technologies improve cereal production in Sub-Saharan Africa? A method of moments quantile regression approach信息通信技术能否改善撒哈拉以南非洲的谷物生产？矩量法分位数回归方法Abdul Salami Bah, Yongqiang Wang, Nazir Muhammad Abdullahi, Sintayehu Adissu Maleko, Nomore Nkhoma摘要 (Abstracts)
Soda taxes versus cup sizes when the retailer practices nonlinear pricing: An experiment含糖饮料税与杯型限制：当零售商实行非线性定价时的实验比较José G. Nuño-Ledesma, Steven Y. Wu, Joseph V. BalagtasAbstract: Taxation and portion cap rules are alternative policies available to regulate the consumption of sugary drinks. We examine their impacts on consumer surplus and choice availability in an experimental market where sellers can practice second-degree price discrimination. In the laboratory, single-product sellers interacted with automated buyers with either low or high preference. Under a cap rule, sellers provided two options as frequently as in the control. With a tax, sellers offered single-option menus more frequently and their pricing strategy excluded low-type buyers. Consumer surplus remained unaffected under a cap but was diminished under taxation. We conclude that taxation is not superior to portion size limits in settings with discrete buyer types and when consumer welfare and product availability are of primary concern.税收和份量上限规则是调节含糖饮料消费的替代政策。本研究在一个卖家可以进行二级价格歧视的实验市场中检验了这两项政策对消费者剩余和选择可用性的影响。在实验室中，单产品卖家与具有低偏好或高偏好的自动化买家互动。在上限规则下，卖家提供两个选项的频率与对照组相同。在税收条件下，卖家更频繁地提供单一选项菜单，其定价策略排除了低类型买家。消费者剩余在上限规则下不受影响，但在税收下减少。本文的结论是，在具有离散买家类型且消费者福利和产品可用性是主要关切的情况下，税收并不优于份量限制。全文链接：https://doi.org/10.1111/cjag.70001Assessing differential impacts of a trade agreement using a quantile regression approachAbstract: Using farm-level panel data, we directly estimate the impacts of the Korea–Chile Free Trade Agreements (FTA) on the revenue of the firms in South Korea that faced greater imports—agricultural producers as the FTA induced greater imports of fruits and vegetables from Chile to South Korea. As expected, we find the negative effect of the increased imports on the total crop revenue and profit of the farms. We model and examine the differential impacts and find that the negative effects are greater for high-revenue farms. We document the evidence of the lack of immediate adjustment as a response to the negative shocks from the trade agreement.利用农场层面的面板数据，我们直接估算了韩国-智利自由贸易协定（FTA）对面临更大进口压力的韩国企业（作为FTA导致从智利进口水果和蔬菜增加而受到影响的农业生产者）收入的影响。正如预期的那样，我们发现进口增加对农场的总作物收入和利润产生了负面影响。我们对差异化影响进行了建模和检验，发现高收入农场受到的不利影响更大。我们提供了缺乏即时调整作为对贸易协定负面冲击反应的证据。全文链接：https://doi.org/10.1111/cjag.12390Good co-op, bad co-op: Financing cooperatives with debt and retained earnings under asymmetric information合作社好坏之分：信息不对称下债务和留存收益的合作社融资Julien Cadot, Arnaud FeralAbstract: Cooperatives follow principles such as limits in trading shares and democratic control that supposedly imply financial constraints. In fact, these limits make banks their main external sources of financing and raise specific issues about financial structure. This study proposes a principal/agent model to understand better how information asymmetry affects retained earnings and debt. Our findings are consistent with observations of the financial trends of US agricultural cooperatives for the period 2010–2020: dairy cooperatives have been able to finance growth via debt but with a more than proportional increase in unallocated retained earnings compared to allocated equity. Our model shows that retained earnings are not necessarily due to financial rationing but can be a contractual tool that allows cooperatives to finance their growth with debt, despite their specific ownership structure.合作社遵循限制股份交易和民主控制等原则，这些原则被认为意味着财务约束。事实上，这些限制使银行成为其主要外部融资来源，并引发了关于财务结构的特定问题。本研究提出了一个委托代理模型，以更好地理解信息不对称如何影响留存收益和债务。我们的发现与2010-2020年期间美国农业合作社财务趋势的观察一致：乳制品合作社能够通过债务融资增长，但未分配留存收益的增长比例高于分配权益的增长。我们的模型表明，留存收益不一定是由财务配给造成的，而可能是一种合同工具，使合作社能够尽管其特定所有权结构仍能通过债务融资实现增长。全文链接：https://doi.org/10.1111/cjag.70002Classifying agricultural risk management strategies: A cluster analysis approachMarius Michels, Hendrik Wever, Tim Ölkers, Jonas Adrian Rieling, Richard Barenbräuker, Oliver MußhoffAbstract: This study develops a comprehensive typology of farmers' risk management strategies, simultaneously considering both market-based (e.g., insurance) and on-farm instruments (e.g., high equity ratios). Using Partitioning Around Medoids (PAM) clustering on data collected from 228 German farmers in Saxony during 2022, we identify two distinct farmer types with different approaches to risk management. Our analysis reveals that risk predictability is associated with instrument choice, while resource availability moderates management responses. This relationship manifests in distinct patterns: Large-scale professional farmers develop comprehensive systems combining formal risk management instruments with infrastructural solutions, particularly for highly predictable risks, reflecting their market exposure and resource capacity. In contrast, small-scale diversified farmers opt for more flexible approaches that allow for adaptation to both predictable and less predictable risks while aligning with their resource constraints. The results have implications for agricultural policy, insurance companies, farmers, and advisory services, indicating that effective risk management support should acknowledge the rationality of different approaches and focus on reducing implementation barriers specific to different farm types rather than promoting standardized solutions.本研究同时考虑市场工具（如保险）和农场内工具（如高权益比率），开发了农民风险管理策略的综合分类法。我们使用2022年收集的228名德国萨克森州农民的数据，采用围绕中心点的划分（PAM）聚类方法，识别出两种具有不同风险管理方法的农民类型。我们的分析表明，风险可预测性与工具选择相关，而资源可用性调节管理响应。这种关系表现为不同的模式：大型专业农民开发了结合正式风险管理工具和基础设施解决方案的综合系统，特别是针对高度可预测的风险，反映了他们的市场敞口和资源能力。相比之下，小型多样化农民选择更灵活的方法，能够适应可预测和不太可预测的风险，同时与其资源约束相一致。结果对农业政策、保险公司、农民和咨询服务具有启示意义，表明有效的风险管理支持应承认不同方法的合理性，并专注于减少特定农场类型面临的实施障碍，而不是推广标准化解决方案。全文链接：https://doi.org/10.1111/cjag.70006Does the use of information and communication technologies improve cereal production in Sub-Saharan Africa? A method of moments quantile regression approach信息通信技术能否改善撒哈拉以南非洲的谷物生产？矩量法分位数回归方法Abdul Salami Bah, Yongqiang Wang, Nazir Muhammad Abdullahi, Sintayehu Adissu Maleko, Nomore NkhomaAbstract: Agriculture is a cornerstone of the Sub-Saharan African (SSA) economy, and leveraging ICT to enhance productivity is vital for improving food security. While prior studies focus on ICT's micro-level effects in agriculture, its macro-level impact on SSA's cereal production remains underexplored. This study employs the method of moment quantile regression (MMQR) and a balanced panel dataset to analyze the effects of ICT adoption on cereal production across SSA from 2001 to 2022. The findings reveal that mobile phone usage significantly boosts cereal production, particularly benefiting lower-productivity farmers. Internet access enhances yields, with its impact strengthening at higher productivity levels. Expanded network coverage also positively influences production, while fixed broadband subscriptions show a negative correlation, likely due to rural infrastructure limitations. Furthermore, the study identifies education and agricultural credit as key channels through which ICT improves cereal production. Finally, we find bidirectional causality between cereal production and mobile phone usage, internet access, and network coverage, while fixed broadband subscriptions exhibit a unidirectional causal effect. These insights suggest that policies promoting network expansion, mobile connectivity, and internet access, especially in rural areas, could significantly enhance cereal production in SSA.农业是撒哈拉以南非洲（SSA）经济的支柱，利用信息通信技术提高生产力对改善粮食安全至关重要。虽然先前的研究关注信息通信技术在农业中的微观层面效应，但其对SSA谷物生产的宏观影响仍未被充分探索。本研究采用矩量法分位数回归（MMQR）和平衡面板数据集，分析了2001年至2022年信息通信技术采用对SSA谷物生产的影响。研究结果表明，手机使用显著提高了谷物生产，特别是使低生产力农民受益。互联网接入提高了产量，其影响在较高生产力水平下增强。网络覆盖扩大也对生产产生积极影响，而固定宽带订阅呈负相关，可能由于农村基础设施限制。此外，本研究确定了教育和农业信贷是信息通信技术改善谷物生产的关键渠道。最后，我们发现谷物生产与手机使用、互联网接入和网络覆盖之间存在双向因果关系，而固定宽带订阅表现出单向因果效应。这些见解表明，促进网络扩展、移动连接和互联网接入（尤其是在农村地区）的政策可以显著提高SSA的谷物生产。全文链接：https://doi.org/10.1111/cjag.70003
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