Journal of Agricultural Economics最新文献_第6页

Farmers' adoption of ecological practices: A systematic literature map 农民采用生态实践:系统的文献图谱

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-06-12 DOI: 10.1111/1477-9552.12545

Bethan Thompson, Gaëlle Leduc, Gordana Manevska-Tasevska, Luiza Toma, Helena Hansson

{"title":"Farmers' adoption of ecological practices: A systematic literature map","authors":"Bethan Thompson, Gaëlle Leduc, Gordana Manevska-Tasevska, Luiza Toma, Helena Hansson","doi":"10.1111/1477-9552.12545","DOIUrl":"10.1111/1477-9552.12545","url":null,"abstract":"Understanding the factors associated with adoption of ecological farming practices is a well-established topic of interest to agricultural economists. As the transition to more sustainable agriculture has become a policy priority for the European Union, broad and balanced reviews of this literature are important. We develop a systematic map of quantitative observational studies which describes the ecological practice(s) adopted, the frequency of inclusion and significance of a range of independent variables, and how the dependent variable is measured. We also conduct a quality assessment. We find that while socio-demographic variables and farm structural variables are frequently included, they were insignificant more often than they were significant. For behavioural factors we find stronger evidence for the importance of cognitive or attitudinal variables compared to dispositional attitudinal variables. We also find a growing interest in social factors which will be valuable for researchers to explore further and reflect on the policy implications of our findings.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"75 1","pages":"84-107"},"PeriodicalIF":3.4,"publicationDate":"2023-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1477-9552.12545","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43051550","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

Investigating cost non-attendance as a driver of inflated welfare estimates in mixed-logit models 在混合logit模型中，调查成本非考勤作为膨胀福利估计的驱动因素

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-06-08 DOI: 10.1111/1477-9552.12558

Curtis Rollins

{"title":"Investigating cost non-attendance as a driver of inflated welfare estimates in mixed-logit models","authors":"Curtis Rollins","doi":"10.1111/1477-9552.12558","DOIUrl":"10.1111/1477-9552.12558","url":null,"abstract":"Choice models are used by applied economists for many purposes, such as non-market valuation or estimating willingness to pay for novel food and product attributes. Mixed-logit models allow researchers to account for preference heterogeneity and complex decision-making processes when modelling choices. In mixed-logit models, parameters of monetary attributes such as prices typically are assumed to follow a negative lognormal random distribution to ensure that the marginal utility of a price increase is strictly negative. However, this practice can cause means and standard deviations of welfare estimates to ‘explode’ to unfeasibly large levels, as the model assumes there are some marginal utilities of cost approaching zero. This paper examines whether cost non-attendance, which occurs when respondents ignore costs in stated-preference studies, could be a cause of inflated welfare estimates when a lognormal cost parameter is used. A two-class equality-constrained latent-class model is proposed, in which the cost parameter is fixed at zero for a cost non-attender class and is specified as a random lognormal parameter for cost attenders. This proposed model produces mean welfare estimates that are 17 times lower than a mixed-logit model with a lognormal cost parameter, and 10% lower than a model with a non-random cost parameter. These results suggest that cost non-attendance can result in inflated welfare estimates when employing a lognormal cost parameter, and that accounting for cost non-attendance could be a simple, parsimonious solution to this problem.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"74 3","pages":"921-934"},"PeriodicalIF":3.4,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1477-9552.12558","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48726327","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

Premium subsidies and selection in the federal crop insurance program 联邦作物保险计划中的保费补贴和选择

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-06-07 DOI: 10.1111/1477-9552.12555

Jisang Yu, Edward D. Perry

引用次数: 0

Goals and values of farmers revisited: Gasson fifty years on 重新审视农民的目标和价值观：加斯森50年过去

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-06-01 DOI: 10.1111/1477-9552.12556

Berkeley Hill, Dylan Bradley

{"title":"Goals and values of farmers revisited: Gasson fifty years on","authors":"Berkeley Hill, Dylan Bradley","doi":"10.1111/1477-9552.12556","DOIUrl":"10.1111/1477-9552.12556","url":null,"abstract":"Fifty years have passed since the Journal of Agricultural Economics published an article by Ruth Gasson on the goals and values of farmers in England. Gasson's research demonstrated the complexity of motives and, in particular, the importance farmers attached to the activities of farming (their intrinsic orientation), even among the operators of larger farms. Gasson's article has been widely cited as seminal by subsequent researchers on farmer behaviour. Governments have acknowledged the importance of understanding the motives of farm decision-makers when explaining their responses to economic and policy signals and designing schemes to shape farmers' behaviour. Brexit and the creation of national agricultural policies for each constituent UK country have highlighted the need for this better understanding, though precisely how this information can be used remains difficult. The continued dominance of an intrinsic orientation is particularly important for policies encouraging retirement and for the agri-environment. Gasson's legacy is also important in the quantification of goals and values to segment, and hence model, the heterogeneity of likely farmer responses to market and policy signals.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"75 1","pages":"108-113"},"PeriodicalIF":3.4,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47753181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"经济学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Economic impacts of the Black Sea Grain Initiative 黑海谷物计划的经济影响

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-25 DOI: 10.1111/1477-9552.12549

Davood Poursina, K. Aleks Schaefer, Sidany Hilburn, Tuff Johnson

引用次数: 0

Maritime connectivity and agricultural trade 海上互联互通和农业贸易

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-24 DOI: 10.1111/1477-9552.12548

Ignacio del Rosal

引用次数: 0

Does access to improved grain storage technology increase farmers' welfare? Experimental evidence from maize farming in Ethiopia 获得改良的粮食储存技术是否会增加农民的福利？埃塞俄比亚玉米种植的实验证据

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-24 DOI: 10.1111/1477-9552.12546

Betelhem M. Negede, Hugo De Groote, Bart Minten, Maarten Voors

{"title":"Does access to improved grain storage technology increase farmers' welfare? Experimental evidence from maize farming in Ethiopia","authors":"Betelhem M. Negede, Hugo De Groote, Bart Minten, Maarten Voors","doi":"10.1111/1477-9552.12546","DOIUrl":"10.1111/1477-9552.12546","url":null,"abstract":"Seasonal price variability for cereals is two to three times higher in Africa than on the international reference market. Seasonality is even more pronounced when access to appropriate storage and opportunities for price arbitrage are limited. As smallholder farmers typically sell their production after harvest, when prices are low, this leads to lower incomes as well as higher food insecurity during the lean season, when prices are high. One solution to reduce seasonal stress is the use of improved storage technologies. Using data from a randomised controlled trial, in a major maize-growing region of Western Ethiopia, we study the impact of hermetic bags, a technology that protects stored grain against insect pests, so that the grain can be stored longer. Despite considerable price seasonality—maize prices in the lean season are 36% higher than after harvesting—we find no evidence that hermetic bags improve welfare, except that access to these bags allowed for a marginally longer storage period of maize intended for sale by 2 weeks. But this did not translate into measurable welfare gains as we found no changes in any of our welfare outcome indicators. This ‘near-null’ effect is due to the fact that maize storage losses in our study region are relatively lower than previous studies suggested—around 10% of the quantity stored—likely because of the widespread use of an alternative to protect maize during storage, for example a cheap but highly toxic fumigant. These findings are important for policies that seek to promote improved storage technologies in these settings.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"75 1","pages":"137-152"},"PeriodicalIF":3.4,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1477-9552.12546","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49579490","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

One size does not fit all: Heterogeneous economic impact of integrated pest management practices for mango fruit flies in Kenya—a machine learning approach 一刀切：肯尼亚芒果果蝇病虫害综合治理实践的异质经济影响——一种机器学习方法

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-24 DOI: 10.1111/1477-9552.12550

Kelvin Mulungu, Zewdu Ayalew Abro, Wambui Beatrice Muriithi, Menale Kassie, Miachael Kidoido, Subramanian Sevgan, Samira Mohamed, Chrysantus Tanga, Fathiya Khamis

{"title":"One size does not fit all: Heterogeneous economic impact of integrated pest management practices for mango fruit flies in Kenya—a machine learning approach","authors":"Kelvin Mulungu, Zewdu Ayalew Abro, Wambui Beatrice Muriithi, Menale Kassie, Miachael Kidoido, Subramanian Sevgan, Samira Mohamed, Chrysantus Tanga, Fathiya Khamis","doi":"10.1111/1477-9552.12550","DOIUrl":"10.1111/1477-9552.12550","url":null,"abstract":"Most previous studies evaluating agricultural technology adoption focus on estimating homogeneous average treatment effects across technology adopters. Understanding the heterogeneous effects and drivers of impact heterogeneity should enable interventions to be better targeted to maximise benefits. We apply machine learning using data from a randomised controlled trial to estimate the heterogeneous treatment effect of fruit fly IPM practices (i.e., parasitoids, orchard sanitation, use of food bait, biopesticides, male annihilation technique, and their combinations) in Central Kenya. Results suggest significant heterogeneity in the effect of IPM practices conditioned on household characteristics. The most important covariates explaining differences in treatment effects are wealth, distance to the mango fruit market, age of the household head, labour and experience in mango farming. Results further indicate that those with fewer mango trees benefit more from most IPM practices. Additional analysis across other covariates shows mixed results but generally suggests significant differences between households benefiting the most and those benefiting the least from IPM practices.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"75 1","pages":"261-279"},"PeriodicalIF":3.4,"publicationDate":"2023-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1477-9552.12550","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46392865","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

JAE, 2022: Report of the Editor-in-Chief JAE，2022：主编报告

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-22 DOI: 10.1111/1477-9552.12547

David Harvey

引用次数: 0

Surrogate modelling of a detailed farm-level model using deep learning 使用深度学习对详细的农场级模型进行代理建模

IF 3.4 2区经济学

Journal of Agricultural Economics Pub Date : 2023-05-06 DOI: 10.1111/1477-9552.12543

Linmei Shang, Jifeng Wang, David Schäfer, Thomas Heckelei, Juergen Gall, Franziska Appel, Hugo Storm

{"title":"Surrogate modelling of a detailed farm-level model using deep learning","authors":"Linmei Shang, Jifeng Wang, David Schäfer, Thomas Heckelei, Juergen Gall, Franziska Appel, Hugo Storm","doi":"10.1111/1477-9552.12543","DOIUrl":"10.1111/1477-9552.12543","url":null,"abstract":"Technological change co-determines agri-environmental performance and farm structural transformation. Meaningful impact assessment of related policies can be derived from farm-level models that are rich in technology details and environmental indicators, integrated with agent-based models capturing dynamic farm interaction. However, such integration faces considerable challenges affecting model development, debugging and computational demands in application. Surrogate modelling using deep learning techniques can facilitate such integration for simulations with broad regional coverage. We develop surrogates of the farm model FarmDyn using different architectures of neural networks. Our specifically designed evaluation metrics allow practitioners to assess trade-offs among model fit, inference time and data requirements. All tested neural networks achieve a high fit but differ substantially in inference time. The Multilayer Perceptron shows almost top performance in all criteria but saves strongly on inference time compared to a Bi-directional Long Short Term Memory.","PeriodicalId":14994,"journal":{"name":"Journal of Agricultural Economics","volume":"75 1","pages":"235-260"},"PeriodicalIF":3.4,"publicationDate":"2023-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1477-9552.12543","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47637240","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