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Canadian Journal of Agricultural Economics-Revue Canadienne D Agroeconomie最新文献

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A portion cap rule with two products: An experimental evaluation 两种产品的比例上限规则:实验评估
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-05-29 DOI: 10.1111/cjag.12308
José G. Nuño-Ledesma

Portion cap rules have been proposed to regulate the consumption of foods and ingredients deemed unhealthy. Challenging common intuition, previous theoretical work posits that, when the seller leverages bundling to price-discriminate, buyers are not necessarily affected and some may even benefit from a quantity restriction. I conduct an experiment designed to test this claim. In the laboratory, human subjects take the role of sellers and offer two products to automated buyers with private preferences. I manipulate the policy environment across treatments. The data largely corroborate the anticipated impacts on consumer surplus, speaking to their robustne ss. In particular, consumers with a low appreciation for the regulated good and a high valuation for the unrestricted item benefit from the cap rule.

已经提出了部分上限规定,以规范被认为不健康的食品和成分的消费。以往的理论工作挑战了普遍的直觉,认为当卖方利用捆绑来进行价格歧视时,买方不一定会受到影响,有些人甚至可能从数量限制中受益。我做了一个实验来验证这个说法。在实验室里,人类受试者扮演卖家的角色,根据个人偏好向自动买家提供两种产品。我跨处理操作策略环境。数据在很大程度上证实了对消费者剩余的预期影响,说明了它们的稳健性。特别是,对受管制商品的低评价和对不受限制商品的高评价的消费者受益于上限规则。
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引用次数: 1
A survey of literature examining farmland prices: A Canadian focus 研究农田价格的文献调查:加拿大的焦点
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-05-23 DOI: 10.1111/cjag.12307
B. James Deaton, Chad Lawley

This study assesses agricultural economics literature on farmland prices and key determinants of these prices. The first section of the paper uses a basic capitalization model to organize a review of the literature and data. We then provide a focused assessment of five streams of literature examining farmland prices: (1) boom-bust; (2) the capitalization effect of government agricultural subsidies on farmland prices; (3) agricultural zoning; (4) climate change; and (5) prohibitions against non-local buyers of farmland. Our review highlights challenges to ongoing efforts to model changing farmland prices, the modern emphasis on econometric identification, important variation in the magnitude of estimated relationships across the literature, and the opportunity to expand research in Canada.

本研究评估了农业经济学文献关于农田价格和这些价格的关键决定因素。论文的第一部分使用一个基本的资本化模型来组织文献和数据的回顾。然后,我们对研究农田价格的五种文献流进行了重点评估:(1)繁荣-萧条;(2)政府农业补贴对农地价格的资本化效应;(3)农业区划;(4)气候变化;(5)禁止外地买家购买农地。我们的综述强调了正在进行的对不断变化的农田价格进行建模的挑战,现代对计量经济识别的强调,文献中估计关系的重要变化,以及在加拿大扩大研究的机会。
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引用次数: 2
Handling the discontinuity in futures prices when time series modeling of commodity cash and futures prices 对商品现货和期货价格进行时间序列建模时,期货价格不连续性的处理
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-05-09 DOI: 10.1111/cjag.12306
Joshua G. Maples, B. Wade Brorsen

Futures prices are discontinuous, with each future price series ending at maturity. Differencing before splicing can create a continuous future return series, but still leaves price levels with discrete jumps. When comparing cash and futures prices, there is a need to either make the futures more like the cash price by adding back the changes at rollover or removing the nonstationarity and seasonality from cash prices. In the specific situation of only testing market efficiency of futures prices, we propose using panel unit root tests. Our empirical examples using weekly prices show the null hypothesis of a unit root is not rejected in most cases regardless of the test used.

期货价格是不连续的,每个期货价格系列在到期日结束。在拼接之前的差异可以创建连续的未来回报序列,但仍然使价格水平具有离散的跳跃。在比较现货价格和期货价格时,有必要通过增加展期时的变化,或消除现货价格的非平稳性和季节性,使期货更像现金价格。在仅检验期货价格市场效率的具体情况下,我们建议使用面板单位根检验。我们使用周价格的经验例子表明,在大多数情况下,无论使用哪种检验,单位根的零假设都不会被拒绝。
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引用次数: 1
Reforming Canada's dairy supply management scheme and the consequences for international trade 改革加拿大乳制品供应管理计划及其对国际贸易的影响
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-03-16 DOI: 10.1111/cjag.12305
Brennan A. McLachlan, G. Cornelis van Kooten

Following Carter and Mérel (2016), we explore the export benefits of reforming supply management (SM) in Canada's dairy sector. A trade model with ten regions and five dairy product categories is developed and used to examine the potential benefits of opening international markets to Canadian dairy products. In addition to a baseline, three scenarios are compared—one with SM in place but with Canada able to export freely. Two other scenarios assume SM is eliminated and there is complete free trade, but with high- and low-cost structures. Findings indicate that, in the high-cost scenario, domestic consumers gain from lower prices as the domestic supply and exports fall compared to the status quo, but producers are less well off. However, under a low domestic cost structure, Canada becomes a major exporter of milk, with both producers and consumers gaining from free trade. This scenario assumes that domestic producers take advantage of economies of scale, enabling them to compete in international markets. Appropriate policies will be required to reform the quota regime, while minimizing the harm done to dairy farmers.

继Carter和msamurel(2016)之后,我们探讨了加拿大乳制品行业改革供应管理(SM)的出口效益。开发了一个包含十个地区和五个乳制品类别的贸易模型,并用于研究向加拿大乳制品开放国际市场的潜在好处。除了基线之外,还比较了三种情况——一种是SM,但加拿大可以自由出口。另外两种情况假设SM被消除,存在完全的自由贸易,但存在高成本和低成本结构。研究结果表明,在高成本情景下,由于国内供应和出口与现状相比下降,国内消费者从较低的价格中获益,但生产者则不那么富裕。然而,在低国内成本结构下,加拿大成为牛奶的主要出口国,生产者和消费者都从自由贸易中获益。这一设想假定国内生产商利用规模经济,使它们能够在国际市场上竞争。将需要适当的政策来改革配额制度,同时尽量减少对奶农的伤害。
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引用次数: 0
Six decades of environmental resource valuation in Canada: A synthesis of the literature 加拿大六十年的环境资源评估:文献综合
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-03-14 DOI: 10.1111/cjag.12304
James Macaskill, Patrick Lloyd-Smith

This paper synthesizes Canada's environmental valuation literature over the last six decades. Focusing on primary valuation benefit estimates, we link multiple research outputs from the same data collection effort to obtain an accurate measure of unique studies. We identify a total of 269 unique valuation studies conducted in Canada between 1964 and 2019. The number of valuation studies conducted per year has not increased since 1975 and the median data collection year is 1996. Stated preference (SP) methods are the most popular valuation approaches being used in more than 50% of studies and this share has increased to over 80% within the last decade. We discuss numerous gaps in our knowledge for certain environmental resources and regions, in particular Canada's three Northern territories. The paper provides information on the state of environmental valuation research in Canada and identifies future research needs.

本文综合了过去六十年来加拿大的环境评估文献。专注于主要的估值效益估计,我们将来自相同数据收集工作的多个研究产出联系起来,以获得对独特研究的准确衡量。我们确定了1964年至2019年间在加拿大进行的269项独特估值研究。自1975年以来,每年进行的估值研究的数目没有增加,收集数据的中位数年份是1996年。陈述偏好(SP)方法是最流行的估值方法,在超过50%的研究中使用,这一比例在过去十年中增加到80%以上。我们讨论了我们在某些环境资源和地区,特别是加拿大北部三个地区的知识方面的许多差距。本文提供了有关加拿大环境评估研究现状的信息,并确定了未来的研究需求。
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引用次数: 3
On the economics of meat processing, livestock queuing, and worker safety 关于肉类加工、牲畜排队和工人安全的经济学
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-03-03 DOI: 10.1111/cjag.12303
Bruno Larue

Meat processing plants use inputs in fixed proportions, but these proportions vary with plant size. Shocks to the supply of labor and livestock induce allocative inefficiency, output reductions, and higher unit costs of production. Both labor conflicts and the pandemic caused long labor shortages resulting in unused capacity and large livestock queues. Industry concentration and vertical integration can mitigate some of these problems by internalizing queuing costs and by reallocating workers across plants. Daily shocks make plants operate with either too many workers or too many live animals. Larger plants choose to be labor-constrained more frequently, creating a trade-off between wages and safety for workers.

肉类加工厂按固定比例使用原料,但这些比例因工厂规模而异。对劳动力和牲畜供给的冲击导致配置效率低下、产出减少和单位生产成本上升。劳资冲突和疫情都造成了长期的劳动力短缺,导致产能闲置,牲畜排起了长队。行业集中和垂直整合可以通过内部化排队成本和跨工厂重新分配工人来缓解其中的一些问题。每天的电击使工厂要么有太多的工人,要么有太多的活体动物。较大的工厂更频繁地选择劳动力限制,在工人的工资和安全之间做出权衡。
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引用次数: 1
Grassland easement evaluation and acquisition with uncertain conversion and conservation returns 转换与保护收益不确定的草地地役权评估与取得
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2022-02-18 DOI: 10.1111/cjag.12302
Ruiqing Miao, David A. Hennessy, Hongli Feng

We develop an analytical framework to examine an agency's optimal grassland easement acquisition while accounting for landowners’ optimal decisions under uncertainty in both conversion and conservation returns. We derive the value of “wait and see” (i.e., neither convert nor ease grassland) for landowners and find that grassland-to-cropland conversion probability and easement value vary in opposing directions when “wait and see” is preferred, indicating that a larger conversion probability does not necessarily imply a higher easement value. Our analysis shows that when conservation funds can be flexibly allocated across periods then the agency's optimal acquisition can be readily achieved by sorting land tracts according to their owners’ optimal choices. When funds cannot be flexibly allocated across periods, we examine both a rational agency's and a myopic agency's decision problems. An acquisition index is developed to facilitate optimal easement acquisition.

我们开发了一个分析框架来考察一个机构的最优草地地役权收购,同时考虑土地所有者在转换和保护回报不确定的情况下的最优决策。我们推导了土地所有者“观望”(即既不改造草地也不改造草地)的价值,发现当选择“观望”时,草地转耕地的转换概率和地役权价值呈相反方向变化,表明转换概率越大,地役权价值不一定越高。我们的分析表明,当保护资金可以在不同时期灵活分配时,机构可以根据其所有者的最优选择对土地进行分类,从而很容易实现最优征用。在资金不能灵活分配的情况下,研究了理性主体和短视主体的决策问题。为了实现地役权的最优获取,建立了地役权获取指标。
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引用次数: 1
Spatially explicit modeling of wetland conservation costs in Canadian agricultural landscapes 加拿大农业景观中湿地保护成本的空间显式建模
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-12-09 DOI: 10.1111/cjag.12301
Eric Asare, Lloyd-Smith Patrick, Belcher Kenneth

Agriculture is an important source of food, employment, and tax revenue to society. However, agricultural expansion is an important driver of global natural ecosystem degradation, including wetlands. Economic theory shows that wetland loss is caused by a mismatch between the private wetland conservation costs borne by landowners and the public benefits generated. We develop a spatially explicit wetland management model to estimate the private economic benefit of wetland drainage in an agricultural landscape in Alberta, Canada. We estimate a full wetland supply curve and show that the private economic benefits of wetland drainage are highly heterogeneous within a watershed. We then combine these private costs of wetland conservation with non-monetary measures of public ecosystem benefits to assess four wetland conservation policy targeting scenarios. We find a positive correlation between the opportunity cost of wetland conservation on private landowners and the amount of environmental benefits wetlands offer, suggesting that conserving the wetlands that impose the lowest opportunity cost may not be optimal targets for wetland conservation policy. We contribute to wetland conservation economics by demonstrating that targeted wetland conservation policies can be more effective than a uniform conservation policy that assumes wetlands within agricultural landscapes have the same costs and benefits.

农业是社会粮食、就业和税收的重要来源。然而,农业扩张是包括湿地在内的全球自然生态系统退化的重要驱动因素。经济学理论表明,湿地损失是由土地所有者承担的私人湿地保护成本与产生的公共利益之间的不匹配造成的。我们开发了一个空间显式湿地管理模型来估计加拿大阿尔伯塔省农业景观中湿地排水的私人经济效益。我们估计了一个完整的湿地供应曲线,并表明湿地排水的私人经济效益在流域内是高度不均匀的。然后,我们将这些湿地保护的私人成本与公共生态系统效益的非货币措施结合起来,评估了四种湿地保护政策目标情景。我们发现私人土地所有者的湿地保护机会成本与湿地提供的环境效益之间存在正相关关系,这表明保护机会成本最低的湿地可能不是湿地保护政策的最佳目标。我们通过证明有针对性的湿地保护政策比假设农业景观中的湿地具有相同的成本和收益的统一保护政策更有效,从而为湿地保护经济学做出贡献。
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引用次数: 0
Quality forecasts: Predicting when and how much markets value higher-protein wheat 质量预测:预测市场何时以及在多大程度上重视高蛋白小麦
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-11-02 DOI: 10.1111/cjag.12300
Anton Bekkerman

Wheat markets stand out among other major crop commodity markets because pricing at the first point of exchange—typically a grain handling facility—is differentiated on specific quality characteristics. Moreover, the premiums and discounts that elevators offer to obtain grain of specific quality can be significant. The relative importance of quality premiums and discounts to farm-level production and marketing decisions demonstrate a need to quantitatively measure and explain factors that affect elevators' wheat-quality pricing decisions. This study develops an informed expectation model of elevators' quality-based pricing strategies and empirically estimates the model from a lengthy dataset of weekly price observations. I find empirical evidence that elevators use linear pricing schedules, but more aggressively discount wheat with protein levels lower than a baseline than reward higher-protein wheat. The results also indicate that weather characteristics, futures contract price indicators, and USDA Crop Progress reports are contributors to predicting the new crop protein premiums and discounts, and that out-of-sample accuracy for predicting how grain elevators will value wheat protein ranges between 70% and 80%.

小麦市场在其他主要农作物商品市场中脱颖而出,因为在第一个交易点(通常是谷物处理设施)的定价是根据特定的质量特征而不同的。此外,电梯为获得特定质量的谷物提供的溢价和折扣可能很大。质量溢价和折扣对农场生产和营销决策的相对重要性表明,需要定量测量和解释影响电梯小麦质量定价决策的因素。本研究开发了电梯基于质量的定价策略的知情期望模型,并根据每周价格观察的长数据集对模型进行了实证估计。我发现经验证据表明,电梯使用线性定价表,但对蛋白质水平低于基线的小麦进行折扣的力度更大,而不是奖励蛋白质水平较高的小麦。结果还表明,天气特征、期货合约价格指标和美国农业部作物进展报告有助于预测新的作物蛋白质溢价和折扣,并且预测谷物升降机如何评估小麦蛋白质的样本外准确性在70%到80%之间。
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引用次数: 0
Minimum information management and price-abundance relationships in a fishery 渔业的最小信息管理和价格丰度关系
IF 9 2区 经济学 Q2 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2021-09-17 DOI: 10.1111/cjag.12299
Akbar Marvasti, Sami Dakhlia

We explore the information content of dockside prices and fishing costs in the estimation of stock abundance. Our approach is two-pronged: we first examine whether the implied biomass, that is, the biomass that is consistent with a simple microeconomic model calibrated with observed prices and costs, offers an approximation of actual stock assessments—both agree over the first 20 years of observation, but diverge over the last five. In a second approach, we use annual data in Vector Autoregressive (VAR), Bayesian VAR (B-VAR), and Vector Error Correction (VEC) frameworks and add monthly data in a mixed-frequency data analysis including Mixed-Frequency Bayesian VAR (MF-BVAR) and Mixed-Data Sampling (MIDAS) frameworks for log-differenced time series. Parameter uncertainties are addressed through Bayesian regression and forecasting methods. We find a statistically significant correlation between biometric estimates and changes in a price-based indicator that is robust to the inclusion of confounding factors. We conclude that the combination of price data and per-trip landings, when interpreted with care, can serve as a complementary, but comparatively affordable and timely, source of information for stock assessments.

我们探讨了码头价格和捕捞成本在种群丰度估计中的信息含量。我们的方法是双管齐下的:我们首先检查隐含的生物量,即与观察到的价格和成本校准的简单微观经济模型一致的生物量,是否提供了实际种群评估的近似值——两者在前20年的观察中一致,但在过去的5年里出现了分歧。在第二种方法中,我们在向量自回归(VAR)、贝叶斯VAR (B-VAR)和向量误差校正(VEC)框架中使用年度数据,并在混合频率数据分析中添加月度数据,包括混合频率贝叶斯VAR (MF-BVAR)和混合数据采样(MIDAS)框架,用于对数差分时间序列。通过贝叶斯回归和预测方法解决了参数的不确定性。我们发现生物特征估计值与基于价格的指标变化之间存在统计学上显著的相关性,该指标对混杂因素的包含具有鲁棒性。我们的结论是,价格数据和每次旅行着陆的结合,如果仔细解释,可以作为一个补充,但相对负担得起和及时的信息来源,为库存评估。
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引用次数: 1
期刊
Canadian Journal of Agricultural Economics-Revue Canadienne D Agroeconomie
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