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Increasing the adoption of conservation agriculture: A framed field experiment in Northern Ghana 增加对保护性农业的采用:加纳北部的一项框架式田间试验
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-09-03 DOI: 10.2499/p15738coll2.133739
Kate Ambler, A. Brauw, M. Murphy
Conservation agriculture techniques have the potential to increase agricultural production while decreasing CO2 emissions, yet adoption in the developing world remains low—in part because many years of continuous adoption may be required to realize gains in production. We conduct a framed field experiment in northern Ghana to study how incentives and peer information may affect adoption. Incentives increase adoption, both while they are available and after withdrawal. There is no overall effect of peer information, but we do find evidence that information about long‐term adoption increased adoption, particularly when that information shows that yield gains have been achieved.
保护性农业技术有可能在减少二氧化碳排放的同时提高农业产量,但发展中国家的采用率仍然很低,部分原因是可能需要多年的持续采用才能实现生产收益。我们在加纳北部进行了一项有框架的实地实验,研究激励和同伴信息如何影响收养。激励措施增加了收养率,无论是在可用期间还是在退出后。同行信息没有总体影响,但我们确实发现证据表明,关于长期采用的信息增加了采用率,特别是当这些信息表明已经实现了产量增长时。
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引用次数: 1
Consumers’ valuation of a biofortified crop: Evidence from a laboratory experiment 消费者对生物强化作物的评价:来自实验室实验的证据
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-09-02 DOI: 10.1111/agec.12795
Syed Imran Ali Meerza, Khondoker Mottaleb, Alwin Dsouza, Md. Shajedur Rahaman, Md. Abdur Rouf Sarkar

Malnutrition among women of reproductive age and children remains one of the major issues in developing countries, particularly zinc deficiency. Zinc deficiency hinders cognitive and physical development in children as well as adults. This study utilized a non-hypothetical laboratory valuation experiment to analyze whether positive information about biofortified rice affects consumers’ valuations of biofortified as well as non-biofortified rice. Specifically, we designed a within-subject experiment based on Becker-DeGroot-Marschak (BDM) auction mechanism to compare consumers’ valuations of zinc-biofortified and popular non-biofortified rice varieties before and after exposure to information about the health benefits of zinc-biofortified rice. We conducted our experiments in randomly selected four districts of Bangladesh, and a total of 134 consumers participated in our study. Results reveal that consumers assign a significant premium to zinc-biofortified rice when they receive information about zinc-biofortified rice and its health benefits. Intriguingly, positive information about zinc-biofortified rice negatively affects the valuation of non-biofortified rice varieties, suggesting negative spillover effects. Moreover, our results also identify that both the information provision and labeling are important to increase consumer demand for zinc-biofortified rice.

育龄妇女和儿童营养不良仍然是发展中国家的主要问题之一,尤其是缺锌。锌缺乏阻碍儿童和成人的认知和身体发育。这项研究利用了一个非假设的实验室评估实验来分析有关生物强化大米的积极信息是否会影响消费者对生物强化和非生物强化水稻的评估。具体而言,我们设计了一个基于Becker‐DeGroot‐Marschak(BDM)拍卖机制的受试者内部实验,以比较消费者在接触锌生物强化大米的健康益处信息前后对锌生物强化和流行的非生物强化大米品种的估价。我们在孟加拉国随机选择的四个地区进行了实验,共有134名消费者参与了我们的研究。结果表明,当消费者收到有关锌生物强化大米及其健康益处的信息时,他们会对锌生物强化米饭给予显著的溢价。有趣的是,关于锌生物强化水稻的积极信息对非生物强化水稻品种的估值产生了负面影响,表明存在负面溢出效应。此外,我们的研究结果还表明,信息提供和标签对增加消费者对锌生物强化大米的需求都很重要。
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引用次数: 0
Extreme weather and agricultural management decisions among smallholder farmers in rural Thailand and Vietnam 泰国和越南农村小农的极端天气和农业管理决策
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-08-31 DOI: 10.1111/agec.12793
Sabine Liebenehm, Huong Jaretzky, Hermann Waibel

In this article, we explore whether and to what extent smallholder farmers in Northeastern Thailand and Central Vietnam adjust their farm-level management strategies in response to droughts. We hereby consider adjustments in flexible adaptive strategies including water management, fertilizer and pesticide application, labor, and machine use in response to a contemporaneous drought, and adjustments in crop diversification and investments in response to a previous year drought. To that end, we combine longitudinal household data from the two regions from 2007 to 2017 with monthly high-resolution rainfall and temperature data to characterize droughts at the subdistrict level. We find that Thai farmers scale down input costs in terms of fertilizer and hired labor and outsource tasks to service providers with equipment such as a combine, especially when exposed to extreme droughts. Their diversification and investment response seems, however, muted. While Vietnamese farmers are also reducing fertilizer use, they are expanding both the number of hired laborers and rented machinery services. They are also diversifying their cropping portfolio and investing in agricultural equipment.

在这篇文章中,我们探讨了泰国东北部和越南中部的小农户是否以及在多大程度上调整了农场层面的管理策略以应对干旱。我们在此考虑调整灵活的适应性战略,包括水管理、化肥和农药施用、劳动力和机器使用,以应对同期干旱,以及调整作物多样化和投资,以应对前一年的干旱。为此,我们将2007年至2017年这两个地区的纵向家庭数据与月度高分辨率降雨量和温度数据相结合,以描述分区一级的干旱特征。我们发现,泰国农民在化肥和雇佣劳动力方面降低了投入成本,并用联合收割机等设备将任务外包给服务提供商,尤其是在极端干旱的情况下。然而,他们的多元化和投资反应似乎很冷淡。虽然越南农民也在减少化肥的使用,但他们正在扩大雇佣劳动力和租赁机械服务的数量。他们还使种植组合多样化,并投资于农业设备。
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引用次数: 0
Examining spatial market efficiency under different marketing regulations: The case of Turkish lemon markets 考察不同市场规制下的空间市场效率:以土耳其柠檬市场为例
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-08-09 DOI: 10.1111/agec.12792
Hüseyin Taştan, Yılmaz Köprücü

This study evaluates spatial market and storage efficiency in Turkish lemon markets using switching regime (SR) and threshold autoregression models. Our sample period includes a crucial regulatory reform aimed at improving the performance of fresh fruit and vegetable markets, shortening the production-consumption chain, and reducing retail prices. Using an extended SR model that allows for a gradual transition from the old to the new marketing regime, we test the hypothesis of no structural change in market efficiency and transaction costs in regional markets, including major consumption regions Istanbul, Ankara, and Izmir. Results indicate that the probability of efficient arbitrage regime is relatively higher in the post-reform period, albeit there is still room for improvement. Extended SR models show no significant change in average transaction costs, while threshold autoregression models suggest a slight increase. Furthermore, spatial prices adjust more quickly in the post-reform period, supporting relatively more efficient market functioning. While the regional markets seem to function more efficiently following the marketing reform, it has not led to permanent reductions in retail prices. Finally, our results from storage threshold autoregression models suggest that markets function reasonably efficiently, with no remarkable difference in storage behavior between the pre-reform and post-reform periods.

本研究使用切换机制(SR)和阈值自回归模型评估了土耳其柠檬市场的空间市场和储存效率。我们的样本期包括一项关键的监管改革,旨在改善新鲜水果和蔬菜市场的表现,缩短生产-消费链,降低零售价格。使用允许从旧的营销制度逐步过渡到新的营销制度的扩展SR模型,我们检验了区域市场(包括主要消费地区伊斯坦布尔、安卡拉和伊兹密尔)的市场效率和交易成本没有结构性变化的假设。结果表明,在改革后时期,有效套利制度的概率相对较高,尽管仍有改进的空间。扩展SR模型显示平均交易成本没有显著变化,而阈值自回归模型显示略有增加。此外,空间价格在改革后时期调整更快,支持相对更有效的市场运作。虽然市场营销改革后,地区市场的运作效率似乎更高,但这并没有导致零售价格的永久性下降。最后,我们的存储阈值自回归模型的结果表明,市场运行合理有效,改革前和改革后的存储行为没有显著差异。
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引用次数: 0
What promotes production contract in Indian agriculture? Managing market risk versus profit orientation 是什么促进了印度农业的生产合同?管理市场风险与利润导向
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-07-30 DOI: 10.1111/agec.12791
Saroj, Kirtti Ranjan Paltasingh

We identify factors influencing farmers’ decision-making on various production contracts and are explicitly concerned with whether managing market risk or profit orientation promotes contract farming (CF). After controlling for potential endogeneity, the IV-Tobit regression results indicate that farmers’ risk behavior and profit orientation are vital factors driving CF participation decisions. However, we observed that the impact of profit orientation is relatively more substantial than the risk management motive, suggesting that earning a higher profit, rather than managing market risks, is the primary objective of CF adoption. In addition, other factors such as farm size, mean contract price, education, age, and extension services play a significant role in CF participation. The major policy implications, based on results, call for enhancing the CF network and encouraging farmers to commercialize agriculture as it facilitates access to the market and higher profits. Further, agribusiness firms should share more market risks with farmers to invite risk-averse smallholders into the fold of commercial farming.

我们确定了影响农民对各种生产合同决策的因素,并明确关注管理市场风险或利润导向是否会促进订单农业(CF)。在控制了潜在的内生性之后,IV-Tobit 回归结果表明,农民的风险行为和利润导向是推动合同种植决策的重要因素。然而,我们观察到,利润导向的影响相对来说比风险管理动机的影响更大,这表明赚取更高的利润而不是管理市场风险是采用合同农业的主要目标。此外,农场规模、平均合同价格、教育程度、年龄和推广服务等其他因素在 CF 参与中也发挥着重要作用。根据研究结果,主要的政策影响要求加强 CF 网络,鼓励农民将农业商业化,因为这有利于进入市场并获得更高的利润。此外,农业企业应与农民分担更多的市场风险,邀请规避风险的小农加入商业化农业的行列。
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引用次数: 0
Gender gaps in land rights: Explaining different measures and why households differ in Myanmar 土地权中的性别差距:解释不同的衡量标准和缅甸家庭差异的原因
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-07-26 DOI: 10.1111/agec.12789
Isabel Brigitte Lambrecht, Kristi Mahrt, Nang Lun Kham Synt, Hnin Ei Win, Khin Zin Win

Measuring and understanding gender differences in property rights is key to informing policy decisions and guiding investments aimed at fostering gender equality. However, there are a myriad ways of assessing property rights. Firstly, we assess which indicators to use and why it matters, focusing on rural Myanmar. Myanmar provides an interesting setting, as a large part of the population customarily follows joint property rights in marriage and upon dissolution of marriage and inheritance. However, documented property rights are in the household head's name – usually a male household member. We find that capturing de facto transfer rights is essential, but understanding discrepancies between reported transfer rights and documented rights will be key to policymakers. Capturing agricultural decision-making should remain a priority for agricultural projects. Second, we perform household- and intra-household level analyses to explore why we find joint land rights in some, but not all, households; and why some household members have less land rights than others. A common property rights regime positively reinforces women's land rights, but incompletely so. Within households, a person's role in the household, age, and key life cycle events such as parenthood and marriage are key determinants of having land rights.

衡量和了解产权方面的性别差异是为政策决策提供信息和指导旨在促进性别平等的投资的关键。然而,有无数种评估产权的方法。首先,我们以缅甸农村为重点,评估使用哪些指标及其重要性。缅甸提供了一个有趣的环境,因为大部分人口在婚姻和婚姻解除和继承时习惯上遵循共同财产权利。然而,有文件证明的产权是在户主的名下,户主通常是男性家庭成员。我们发现,获取事实上的转让权至关重要,但理解报告的转让权和记录的转让权之间的差异将是政策制定者的关键。获取农业决策信息仍应是农业项目的优先事项。其次,我们进行了家庭和家庭内部层面的分析,以探讨为什么我们在一些家庭中发现了共有土地权利,而不是所有家庭;以及为什么一些家庭成员拥有的土地权利比其他人少。共同产权制度积极地加强了妇女的土地权利,但并不完全如此。在家庭中,一个人在家庭中的角色、年龄和关键生命周期事件(如为人父母和结婚)是拥有土地权的关键决定因素。
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引用次数: 1
Will climate change jeopardize the Vietnamese target of maintaining farmland for food security? A fractional multinomial logit analysis of land use choice 气候变化会危及越南维护农田以保障粮食安全的目标吗?土地利用选择的分数多项式logit分析
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-07-02 DOI: 10.1111/agec.12787
Trinh Nguyen Chau, Frank Scrimgeour

The Vietnamese government is concerned with long-term food security due to the rising demand for food and potential climate-induced conversion of areas under food production. This article is among the first studies which examine the climate-induced uptake of crop substitution and its likely impact on the national target of maintaining food areas to sustain food security. In contrast to most crop choice analyses which obtain cross-household evidence using a Multinomial Logit model, we model within household competition across alternative uses of land using a Fractional Multinomial Logit model. Our empirical findings suggest that Vietnamese farmers have adapted to the changing climate by selecting different crops. Increases in winter and summer temperatures mean that farmers are more likely to substitute cereals for others. Farmers choose annual industrial crops in locations with warmer springs and autumns. The choice of perennial industrial crops is sensitive to spring and autumn temperatures. Precipitation has small impacts on land use choice. The projected climate changes are not likely to jeopardize the national target of maintaining 40 percent of farmland under food production. However, we expect projected climate changes to result in large shifts from cereals to annual industrial crops in the main rice bowl of Vietnam.

由于对粮食的需求不断增长,以及气候可能导致粮食生产地区的转变,越南政府对长期粮食安全感到担忧。本文是首批研究气候诱导的作物替代吸收及其对维持粮食地区以维持粮食安全的国家目标可能产生的影响的研究之一。与大多数使用多项Logit模型获得跨家庭证据的作物选择分析不同,我们使用分数项Logit模型对家庭内部的竞争进行了模拟。我们的实证结果表明,越南农民通过选择不同的作物来适应不断变化的气候。冬季和夏季气温的升高意味着农民更有可能用谷物代替其他谷物。农民在春秋季较暖和的地方选择一年生工业作物。多年生经济作物的选择对春季和秋季的温度很敏感。降水对土地利用选择的影响较小。预计的气候变化不太可能危及维持40%农田粮食生产的国家目标。然而,我们预计预计的气候变化将导致越南主要水稻种植区从谷物大规模转向年度工业作物。
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引用次数: 0
Aspirations and investments in livestock: Evidence of aspiration failure in Kenya 对牲畜的渴望和投资:肯尼亚渴望失败的证据
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-06-14 DOI: 10.1111/agec.12785
Martin Paul Jr. Tabe-Ojong, Thomas Heckelei, Sebastian Rasch

Aspirations influence future-oriented behavior and ensuing outcomes but they may also fail to do so when the aspired-to-status is far away from the current one. Theoretical predictions suggest an inverted U-shaped relationship between this aspiration gap and the effort to achieve what is aspired to. Aspirations that are ahead but not too far ahead of the current status serve as the best incentives for investments. We examine the income aspiration gap of smallholder households and relate it to livestock in a pastoral setting in Northern Kenya. Our focus on livestock is guided by the burgeoning recognition of livestock as an investment and saving conduit for many households in pastoral communities in developing nations. Employing different empirical strategies including parametric and semi-parametric techniques, we find livestock to be increasing with aspirations up to a threshold, from which it then declines to lead to an aspiration failure. Delving into livestock heterogeneity, we uncover evidence that cattle and poultry respond more to the aspiration gap than small ruminants such as sheep and goats. Different U-shaped tests confirm this relationship, bolstering the evidence of an aspiration failure. These findings are robust to the inclusion of relevant controls, truncations at zero, and different variable transformations. We also show that the findings are unlikely to be driven by unobserved heterogeneity. Additionally, we find that internal locus of control, that is the degree to which individuals believe they control outcomes in their lives is associated with livestock investments.

抱负会影响面向未来的行为和随之而来的结果,但当渴望获得的地位与当前地位相去甚远时,抱负也可能无法做到这一点。理论预测表明,这种愿望差距与实现愿望的努力之间呈倒u型关系。超前但又不太超前的抱负是投资的最佳激励。我们研究了小农家庭的收入期望差距,并将其与肯尼亚北部牧区的牲畜联系起来。我们之所以关注畜牧业,是因为人们日益认识到畜牧业是发展中国家畜牧社区许多家庭的投资和储蓄渠道。采用不同的经验策略,包括参数和半参数技术,我们发现牲畜随着愿望的增加而增加到一个阈值,然后从这个阈值开始下降,导致愿望失败。深入研究牲畜异质性,我们发现证据表明,牛和家禽比绵羊和山羊等小型反刍动物对吸入差距的反应更大。不同的u型测试证实了这种关系,进一步证实了吸入失败的证据。这些发现对于包含相关控制、零截断和不同变量转换都是稳健的。我们还表明,这些发现不太可能是由未观察到的异质性驱动的。此外,我们发现内部控制点,即个人认为他们控制生活结果的程度与牲畜投资有关。
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引用次数: 1
Time preferences and obesity: Evidence from urban India 时间偏好与肥胖:来自印度城市的证据
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-06-01 DOI: 10.1111/agec.12777
Archana Dang

This article examines the relationship between agents’ behavioral attributes (or time preferences) and the problem of obesity and, more generally, problems of both overnutrition and undernutrition. Through a primary survey in western Delhi data were gathered on participants’ food choices and body mass index. Time preferences, as posited by the (β,δ${{beta}},{{delta}}$) quasi-hyperbolic discounting model, were elicited using an incentivized, choice-based experiment. Estimating a simultaneous two-equation model, the article finds that individuals in the sample with lower β and/or lower δ (or higher time preferences) make unhealthy food choices, which, in turn, significantly increases their BMI. In addition, a supplementary empirical exercise analyzes a large, secondary unit record data set, with savings as a proxy for time preferences, to provide evidence that these behavioral attributes also explain the problem of underweight (germane in developing countries).

这篇文章探讨了代理人的行为属性(或时间偏好)与肥胖问题之间的关系,以及更普遍的营养过剩和营养不足问题。通过在德里西部进行的初步调查,收集了参与者的食物选择和体重指数数据。时间偏好,如(β, δ ${{beta}},{{delta}}$)准双曲折现模型所假定的那样,是通过一个激励的、基于选择的实验得出的。通过同时估算双方程模型,文章发现样本中β值和/或δ值较低(或时间偏好较高)的个体会做出不健康的食物选择,这反过来又显著增加了他们的BMI。此外,一项补充的实证研究分析了一个大型的二级单位记录数据集,以储蓄作为时间偏好的代表,以提供证据证明这些行为属性也解释了体重不足的问题(与发展中国家密切相关)。
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引用次数: 0
Gender pay gaps in economics: A deeper look at institutional factors 经济学中的性别薪酬差距:对制度因素的深入研究
IF 4.1 3区 经济学 Q1 AGRICULTURAL ECONOMICS & POLICY Pub Date : 2023-05-31 DOI: 10.1111/agec.12778
MinSub Kim, Joyce J. Chen, Bruce A. Weinberg

Using rich data on graduate tenure-track faculty, we explore the gender pay gap in academic departments of economics and agricultural/applied economics and the differences between them. We find that the gender pay gaps in economics and agricultural/applied economics are 8.3% and 4.1%, respectively, controlling for faculty rank, experience, and university affiliation. The gender pay gap increases with rank and varies across institutions. Productivity is an important determinant of wages but it explains little of the gender pay gap. While the lower unexplained gap in agricultural/applied economics is laudable, a greater share of women who are assistant and associate professors is part of the explanation. Given institutional differences, we explore the extent to which institutional factors—differences in the returns to observed characteristics, such as rank; unobserved characteristics; and institutional differences in pay levels—contribute to the gender pay gap.

利用研究生终身教职教师的丰富数据,我们探讨了经济学和农业/应用经济学学术部门的性别薪酬差距及其之间的差异。我们发现经济学和农业/应用经济学的性别薪酬差距分别为8.3%和4.1%,控制了教师级别,经验和大学所属。性别薪酬差距随着级别的增加而增加,在不同的机构中也有所不同。生产率是工资的一个重要决定因素,但它几乎不能解释性别收入差距。虽然农业/应用经济学中无法解释的差距较小值得称赞,但担任助理教授和副教授的女性比例更高是部分原因。考虑到制度差异,我们探讨了制度因素——回报差异对观察到的特征(如排名)的影响程度;未被注意的特征;薪酬水平的制度差异也导致了性别薪酬差距。
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引用次数: 1
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Agricultural Economics
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