American Journal of Agricultural Economics最新文献

A reply to “Quality standards, industry structure, and welfare in a global economy” 对“全球经济中的质量标准、产业结构与福利”的回答

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-16 DOI: 10.1111/ajae.70001

Carl Gaigné, Bruno Larue

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A comment on “Quality standards, industry structure, and welfare in a global economy” 评《全球经济中的质量标准、产业结构与福利》

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-01 DOI: 10.1111/ajae.70002

Dao-Zhi Zeng

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Sinking peatlands: Optimal control of subsidence 泥炭地沉降：沉降的最优控制

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-08-28 DOI: 10.1111/ajae.70010

Suphi Sen, Dewy Verhoeven, Hans-Peter Weikard

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Size-based regulation and water quality: Evidence from the Iowa hog industry 基于规模的监管和水质：来自爱荷华州养猪业的证据

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-24 DOI: 10.1111/ajae.70006

Chen-Ti Chen, Gabriel E. Lade, John M. Crespi, David A. Keiser

{"title":"Size-based regulation and water quality: Evidence from the Iowa hog industry","authors":"Chen-Ti Chen, Gabriel E. Lade, John M. Crespi, David A. Keiser","doi":"10.1111/ajae.70006","DOIUrl":"10.1111/ajae.70006","url":null,"abstract":"The growing prevalence of animal feeding operations (AFOs) in the United States raises concerns among the public and regulators about their impact on local environmental quality. By linking historical regulatory records of AFOs in Iowa to downstream surface water pollution monitors, this paper studies the effects of the 2003 Clean Water Act regulations that targeted water pollution from the largest hog AFOs. The regulation decreased ammonia concentrations downstream of large hog AFOs by 6–8 percentage points. We find limited to no evidence of improvement for dissolved oxygen and phosphorus concentrations. Pollution reductions are largest during heavy precipitation months, consistent with the regulations reducing on-site spills and nutrient runoff from local fields. However, we find that pollution increased downstream from mid-sized hog AFOs, which were exempt from the updated regulations. Given the growth in the number of mid-sized facilities relative to large AFOs, we estimate that the regulation had little discernible impact on overall water quality.","PeriodicalId":55537,"journal":{"name":"American Journal of Agricultural Economics","volume":"108 3","pages":"829-855"},"PeriodicalIF":3.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ajae.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A rejoinder to “Quality standards, industry structure, and welfare in a global economy” 回答“全球经济中的质量标准、产业结构与福利”

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-01 DOI: 10.1111/ajae.70000

Dao-Zhi Zeng

引用次数: 0

Rainfall timing, forage growth, and insuring forage: Linking producer perceptions to observational data 降雨时间、草料生长和草料保险：将生产者的看法与观测数据联系起来

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-08-26 DOI: 10.1111/ajae.70009

Brittney Goodrich, Jisang Yu, Kelly Davidson, Gyuhyeong Goh

{"title":"Rainfall timing, forage growth, and insuring forage: Linking producer perceptions to observational data","authors":"Brittney Goodrich, Jisang Yu, Kelly Davidson, Gyuhyeong Goh","doi":"10.1111/ajae.70009","DOIUrl":"10.1111/ajae.70009","url":null,"abstract":"The timing and amount of rainfall are crucial in forage growth. Producer perceptions of the rainfall distribution are likely to influence their choices related to the Pasture, Rangeland, and Forage Rainfall Index insurance program. Because of the scarcity of forage production data, diversity of forage production systems, and climates throughout the United States, the correlation between the timing of rainfall and forage growth varies substantially. Using survey data from the northeastern and southeastern United States, we provide a snapshot of producers' perceptions on the relevant rainfall timing for forage growth. We also show that the perceptions do not align with actual insurance enrollment in the surveyed counties. We provide an empirical framework linking survey responses to county-level observational data using a Bayesian approach to determine the months when rainfall is most important for forage growth. We find that the producers' perceptions act as useful priors and are consistent with the county-level analysis. Our methods demonstrate a framework for combining survey data with secondary data to overcome data constraints that can be applied to other contexts beyond the Pasture, Rangeland, and Forage Rainfall Index insurance program.","PeriodicalId":55537,"journal":{"name":"American Journal of Agricultural Economics","volume":"108 3","pages":"747-770"},"PeriodicalIF":3.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ajae.70009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal timing and rate of nitrogen fertilizer use: An integrated network technology approach 氮肥最佳施用时机与用量：综合网络技术方法

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-08-25 DOI: 10.1111/ajae.70011

Tihomir Ancev, Moriah Bostian

引用次数: 0

What are the carbon services from cover-crop adoption worth from farmers' perspective? 从农民的角度来看，采用覆盖作物带来的碳服务价值是什么？

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-09 DOI: 10.1111/ajae.70005

Saurav Raj Kunwar, Robert G. Chambers, Laura F. Gentry, Teresa Serra

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Spatial price competition and buyer power in the U.S. beef packing industry 美国牛肉包装行业的空间价格竞争与买方力量

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-10 DOI: 10.1111/ajae.70003

GianCarlo Moschini, T. Jake Smith

{"title":"Spatial price competition and buyer power in the U.S. beef packing industry","authors":"GianCarlo Moschini, T. Jake Smith","doi":"10.1111/ajae.70003","DOIUrl":"10.1111/ajae.70003","url":null,"abstract":"We develop a spatially-explicit model of the U.S. beef packing industry to study key questions related to competition in an oligopsony setting. Cattle supplies are modeled at the county level, and packing plants' location, capacity, and ownership are taken as given. Packers procure negotiated cattle by competing in prices in each local (county) market, while accounting for transportation costs and pre-existing contracted supplies (alternative marketing arrangements). The model, calibrated to match observed 2022 data, is solved for the Bertrand–Nash equilibrium prices. The computed markdown in the price packers pay for fed cattle is decomposed into three components: the portion due to the inherent spatial oligopsony power; the amount due to an aspect of market concentration (firms owning multiple plants); and the component due to contracting. We find that markdowns are moderate, about $3.69/cwt or 2.6% of the fed cattle price, on average. About 54% of this markdown is due to the spatial configuration of plants, 40% is due to pre-contracted supplies, and only 6% of the markdown is attributed to multi-plant ownership by firms. Separately from markdowns, capacity constraints are found to lower fed cattle prices by 0.8% on average. Beyond the baseline, simulated counterfactual scenarios highlight specific policy-relevant questions. Markdowns are reasonably robust across counterfactuals, decreasing only modestly when plants operate independently or the use of contracting is limited. Across all counterfactual scenarios, cattle prices per se are most affected by tightening capacity constraints (as arising from a major plant closure or an upward swing in the cattle cycle).","PeriodicalId":55537,"journal":{"name":"American Journal of Agricultural Economics","volume":"108 3","pages":"771-798"},"PeriodicalIF":3.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ajae.70003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating large-scale government investments in fertilizer adoption: The Ethiopian experience 评估大规模政府对化肥采用的投资：埃塞俄比亚的经验

IF 3.3 2区经济学

American Journal of Agricultural Economics Pub Date : 2026-04-02 Epub Date: 2025-07-31 DOI: 10.1111/ajae.70007

Thomas Assefa, Ellen McCullough, Guush Berhane

{"title":"Evaluating large-scale government investments in fertilizer adoption: The Ethiopian experience","authors":"Thomas Assefa, Ellen McCullough, Guush Berhane","doi":"10.1111/ajae.70007","DOIUrl":"10.1111/ajae.70007","url":null,"abstract":"We evaluate the impact of a large Government of Ethiopia intervention to raise fertilizer supply by establishing five fertilizer blending facilities supplying fertilizers tailored to local soil nutrient profiles. We rely on the phased geographic rollout of blending facility establishment to identify the causal effect on fertilizer use, application rates, crop yields, gross crop revenue, and household consumption. Combining effects of multiple treatment periods, each estimated using a doubly robust difference-in-difference model, we find that the blending facilities increased the probability that farmers adopt the new blended fertilizers by 22 percentage points and increased application rates by 17 kg/ha (baseline adoption was zero). The facilities mostly induced farmers who previously used DAP to switch to NPS, and we find large decreases in DAP adoption (by 22 percentage points, 47% of the control group base mean) and application rates (16 kg/ha, 52% of the control group base mean) yet no impact on overall fertilizer adoption or application rates. Though the new blended fertilizers were expected to perform better, there is no evidence they improved crop yields, crop gross revenue, or household consumption. The effect of the intervention was more pronounced (with larger increases in NPS use and larger decreases in DAP use) for farms located near demonstration plots, which the Government used to train farmers about the agronomic response to the new fertilizers. We confirm results using three large-scale longitudinal datasets and show that they are robust to choices of specification, treatment definition, and inference assumptions.","PeriodicalId":55537,"journal":{"name":"American Journal of Agricultural Economics","volume":"108 3","pages":"874-900"},"PeriodicalIF":3.3,"publicationDate":"2026-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ajae.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147696277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0