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Determinants of Variation in Aquaculture Profits 水产养殖利润变化的决定因素
Pub Date : 2020-10-01 DOI: 10.2139/ssrn.3703168
F. Asche, Bård Misund, Ragnar Tveterås
Substantial increases in profitability, in both fisheries and aquaculture, in the recent years have prompted increased attention to rent creation and rent capture in the seafood sector. In fact, Iceland, The Faroe Island and Norway have all recently implemented taxation of economic rent from salmon aquaculture. Estimation of economic rent is challenging for many reasons, particularly due to its elusive nature and widespread confusion amongst academics as to how to identify and quantify different sources of economic rent. Moreover, accurate rent estimations require that inframarginal profits are not ignored but estimated alongside rent. Ignoring inframarginal profits will overestimate economic rents, which could be problematic since in some industries inframarginal profits can be substantial. We find that salmon aquaculture is one of these. Using data on auction of salmon production capacity from 2018 and 2020, we estimate the market values of salmon farming licenses include a substantial value from inframarginal profits. We find that companies that are less efficient have a larger willingness to pay for marginal production capacity than larger salmon farming companies do, suggesting that inframarginal profits are important in explaining the variation in willingness to pay for new production capacity.
近年来,渔业和水产养殖业盈利能力的大幅增加促使人们更加关注海产品部门的租金创造和租金获取。事实上,冰岛、法罗岛和挪威最近都开始对鲑鱼养殖的经济租金征税。由于许多原因,经济租金的估算具有挑战性,特别是由于其难以捉摸的性质以及学术界对如何识别和量化不同经济租金来源的普遍困惑。此外,准确的租金估算要求不忽略超边际利润,而应与租金一起估算。忽略超额利润会高估经济租金,这可能是有问题的,因为在某些行业,超额利润可能是可观的。我们发现鲑鱼养殖就是其中之一。利用2018年至2020年鲑鱼生产能力拍卖的数据,我们估计鲑鱼养殖许可证的市场价值包括来自超边际利润的大量价值。我们发现,效率较低的公司比大型鲑鱼养殖公司有更大的边际生产能力支付意愿,这表明超边际利润在解释为新生产能力支付意愿的变化方面很重要。
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引用次数: 0
Green banks vs. non-green banks: A Differences-in-Differences CAMEL-based approach 绿色银行与非绿色银行:基于骆驼模型的差异分析方法
Pub Date : 2020-08-23 DOI: 10.2139/ssrn.3663894
Ioannis Malandrakis, Konstantinos Drakos
The need for the transition from a high-carbon to a low-carbon economy has led to the creation of the so-called green banks, while many financial institutions around the world are gradually adjusting their loan portfolio to a greener one by financing environment-friendly projects. Using a panel data set of 165 global and non-global banks from 38 countries worldwide, covering the period 1999 – 2015, we examine whether there are any discernible performance differences between green and non-green banks. The variables of interest are fundamental CAMEL factors. By employing panel data techniques, we investigate whether there are statistically significant differences between the two groups. Moreover, we adopt the Differences-in-Differences approach to examine whether green banks (“treatment” group) and non-green banks (“control” group) exhibit differential behavior, and we use the financial crisis outbreak as the time of intervention. We find that both green and non-green banks are affected by nearly the same bank-specific factors and that they do not exhibit heterogeneous behavior with respect to several fundamental aspects. Specifically, our results show that green banks – whether global or not – perform better than their non-green counterparts only in terms of Total Capital Ratio and Tier1 Capital Ratio during and after the financial crisis. As for the rest of the CAMEL factors, it seems that both groups exhibit the same behavior, especially in the post-crisis period. In addition, our results indicate that the financial crisis has: (a) a positive effect on capital adequacy (excluding Leverage Ratio which seems to have remained unaffected), on asset quality and management quality; (b) a negative effect on earnings ability; (c) a negative impact on liquidity, for both bank types. These results seem robust for the pre- and, especially, the post- 2007-2008 financial crisis periods.
从高碳经济向低碳经济转型的需要催生了所谓的绿色银行,而世界各地的许多金融机构正在通过资助环境友好型项目,逐步调整其贷款组合,使其更加绿色。利用1999年至2015年期间全球38个国家的165家全球性和非全球性银行的面板数据集,我们研究了绿色银行和非绿色银行之间是否存在任何可识别的绩效差异。感兴趣的变量是基本的CAMEL因素。通过采用面板数据技术,我们调查了两组之间是否存在统计学上的显著差异。此外,我们采用差异中的差异方法来检验绿色银行(“治疗”组)和非绿色银行(“对照组”组)是否表现出差异行为,并以金融危机爆发为干预时间。我们发现绿色银行和非绿色银行都受到几乎相同的银行特定因素的影响,并且它们在几个基本方面没有表现出异质行为。具体而言,我们的研究结果表明,绿色银行(无论是全球性的还是非全球性的)仅在金融危机期间和之后的总资本比率和一级资本比率方面表现优于非绿色银行。至于CAMEL因素的其余部分,似乎两组人表现出相同的行为,尤其是在后危机时期。此外,我们的结果表明,金融危机具有:(a)对资本充足率(不包括杠杆率,似乎没有受到影响),资产质量和管理质量的积极影响;(b)对盈利能力产生负面影响;(c)对两种银行类型的流动性产生负面影响。这些结果对于金融危机前,尤其是2007-2008年金融危机后的时期来说似乎是强有力的。
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引用次数: 0
Credit System to Restore National Economies and Underwrite the Transition to Ecosocially Sustainable GDP, via Conceptual Biomimicry & Fractal Dynamics 通过概念仿生学和分形动力学,信用体系恢复国民经济并保证向生态社会可持续的GDP过渡
Pub Date : 2020-07-14 DOI: 10.2139/ssrn.3654501
Andrew Fynn
Natural ecosystems support competition within sustainable boundaries maintained by the ecosystem itself. Such principles of benevolent interaction can be embedded into the economic system. An intelligently upgraded economy can drive urgently needed economic, environmental and social outcomes, at a profit.

Fluidity uses a digital credit with variable parameters alongside the national currency, within hybrid transactions. Adjusting these values renders different products and services less expensive to buy. This can be used to engineer a race to the top for participating sectors, with expansive implications for the broader economy.

Fluidity allows the transformation of GDP, according to sustainable criteria. With wages partly paid in credits, take-home pay can effectively be increased without stoking inflation. Fluidity brings rapid crisis response, can maintain velocity and confidence, and mitigate recession. Replacing bailouts and devaluation with responsive capacity, Fluidity serves both democracy and enterprise.
自然生态系统支持在生态系统自身维持的可持续边界内的竞争。这种善意互动的原则可以嵌入到经济体系中。智能升级的经济可以在盈利的情况下推动急需的经济、环境和社会成果。在混合交易中,流动性使用具有可变参数的数字信贷以及国家货币。调整这些值可以降低不同产品和服务的购买成本。这可以用来为参与的行业策划一场力争上游的竞赛,对更广泛的经济产生广泛影响。流动性允许GDP根据可持续标准进行转换。由于部分工资以信贷形式支付,实得工资可以在不引发通货膨胀的情况下有效地增加。流动性带来快速的危机反应,可以保持速度和信心,并减轻衰退。流动性以响应能力取代了救助和货币贬值,既服务于民主,也服务于企业。
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引用次数: 0
Wetlands in Brazil, Potential Source of Energy Biomass? Evaluating the Produced Cyperus Giganteu Pruning Material 巴西湿地:生物质能源的潜在来源?生产的巨柏剪枝材料的评价
Pub Date : 2020-06-23 DOI: 10.2139/SSRN.3634031
Eliane Cristina Braga Martins Goncalves, F. J. Moura, Marcos Alexandre Teixeira
The objective of this study was the fully characterization of the pruning wastes from macrophyte Cyperus giganteus from tertiary sewage treatment of Wastewater Treatment Plant, Ponte dos Leites, located in Araruama, RJ, Brazil. Such analyses aimed at the systematic evaluation of the feasibility of using the pruning material as an energy input. To reach the objectives, the macrophytes were submitted to experimental analyses of their physical properties (Specific density: 0.44-0.77 g.cm -3 , Bulk density: 0.08-0.09 g.cm -3 , among others characteristics), chemical and immediate analysis, and thermal analysis. The results of thermal behavior characterized the biomass as a viable energy source (High Heat Value 14-16 MJ.kg -1 ). Focused in its pre-treatment for energy use, C. giganteus different samples fractions analyses confirmed that the molecular structures of the macrophyte (Lignin: 17.32-26.83 wt%, Cellulose: 27.84-32.65 wt%, Hemicellulose: 30.09-31.46 wt%; depending on the part of the plant) affect the mechanisms of thermal decomposition. Pyrolysis processing yields vary from 83.43 to 75.91%. This shows the effectiveness of the technique adopted in the transformation of the analyzed vegetal residues into raw materials for energy generation, evidencing the energy potential of the biomass and, confirming the use of these as raw materials in thermo-conversion processes.
本研究的目的是对位于巴西RJ州Araruama的Ponte dos Leites污水处理厂三级污水处理产生的大型植物巨莎草(Cyperus giganteus)修剪废弃物进行全面表征。这种分析旨在系统地评价使用修剪材料作为能量输入的可行性。为了达到目的,对这些大型植物进行了物理特性(比密度:0.44-0.77 g.cm -3,容重:0.08-0.09 g.cm -3等特性)、化学分析、即时分析和热分析的实验分析。热行为结果表明生物质是一种可行的能源(高热值14-16 MJ)。Kg -1)。重点对其进行能量利用前处理,通过对不同样品组分的分析,证实了该大型植物的分子结构(木质素:17.32 ~ 26.83 wt%,纤维素:27.84 ~ 32.65 wt%,半纤维素:30.09 ~ 31.46 wt%;取决于植物的部分)影响热分解的机制。热解过程产率从83.43 ~ 75.91%不等。这表明了将分析的植物残留物转化为能源生产原料所采用的技术的有效性,证明了生物质的能源潜力,并确认了在热转化过程中使用这些作为原材料。
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引用次数: 0
The Model of Demand for Production Factors in Agriculture 农业生产要素需求模型
Pub Date : 2020-06-23 DOI: 10.30858/zer/120605
W. Rembisz, Justyna Góral
This publication is theoretical in nature. It attempts to determine a hypothetical relation between the supply of agricultural production determined by the given demand for it on the one hand and the demand for factors involved in the production on the other. It is included in one model of reasoning with the use of regularities and coefficients known in microeconomics. In particular, the demand, supply and production elasticity coefficients were used. The starting point is assumptions resulting from the demand and three-factor function of production and about rational choices of farm producers. The hypothesis that the relation between supply of production for the demand for it and demand for production factors is determined by changes in production efficiency was positively verified by means of theoretical and formal analysis. This was proved by reference to price elasticity of production and supply and price elasticity of demand for production factors in relation to a product. This is an attempt to fill a research gap in this field.
这篇文章是理论性的。它试图确定一方面由给定需求决定的农业生产供给与另一方面对生产要素的需求之间的假设关系。它包含在一个推理模型中,使用微观经济学中已知的规律和系数。特别使用了需求、供给和生产弹性系数。本文的出发点是基于需求和生产三要素函数的假设,以及关于农业生产者理性选择的假设。通过理论分析和形式分析,积极验证了生产需求供给与生产要素需求关系由生产效率变化决定的假设。这是通过参考生产和供给的价格弹性以及与产品相关的生产要素的需求价格弹性来证明的。这是填补这一领域研究空白的一次尝试。
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引用次数: 0
Determinants of Contract Farming in Barley Production – Regression Tree Approach 大麦生产中合同耕作的决定因素——回归树法
Pub Date : 2020-06-15 DOI: 10.56093/ijas.v91i3.112507
S. R, Randhir Singh, Anuj Kumar, R. Chand, JK Pandey, Rajendra Singh, R. Singh, AS Kharub, R. Verma
Barley, a nutri-rich cereal is gaining momentum among stakeholders owing to multiple health benefits but the concern is its declining area, possibly attributed to lack of market and competitive pricing strategy. Amongst alternatives, contract farming is widely suggested for better price realisation and assured market. In the context, the present study was carried out during 2013-15 in four major barley growing states in India, viz. Haryana, Madhya Pradesh, Rajasthan and Uttar Pradesh for identifying the determinants of contract farming from a sample of 400 randomly selected farmers using regression tree approach. Findings indicated that the average yield of farmers enrolled in contract farming was 4791 kg/ha (n=90) against non-contractors with an estimated yield of 3549 kg/ha (n=310), implying a yield advantage of 35%. The practice of enrollment into contracts was popular in Rajasthan as corroborated by regression tree. The analysis also indicated that farm size, seed replacement behaviour, source of seed and area under barley were turned as deciding factors in contract enrollment. Overall, the study indicated that region plays a prominent role in enrollment into contracts despite multiple benefits availed. The study advocates barley growers to take advantage of contract farming, especially small-holders to enroll into contracts for mitigating price risk apart from self-empowerment in barley production.
大麦是一种营养丰富的谷物,因其多种健康益处而受到利益攸关方的青睐,但令人担忧的是其种植面积不断下降,可能是由于缺乏市场和具有竞争力的定价策略。在其他选择中,合同农业被广泛建议为更好的价格实现和有保障的市场。在此背景下,本研究于2013- 2015年在印度的四个主要大麦种植邦进行,即哈里亚纳邦、中央邦、拉贾斯坦邦和北方邦,利用回归树方法从随机选择的400名农民样本中确定合同农业的决定因素。研究结果表明,签约农民的平均产量为4791公斤/公顷(n=90),而非签约农民的估计产量为3549公斤/公顷(n=310),这意味着产量优势为35%。回归树证实了签约的做法在拉贾斯坦邦很流行。分析还表明,农场规模、种子替代行为、种子来源和大麦种植面积是签约的决定因素。总体而言,该研究表明,尽管有多种好处,但地区在签订合同方面发挥了突出作用。该研究倡导大麦种植者,特别是小农,利用合同农业的优势,除了在大麦生产中自我赋权外,还可以签订合同来降低价格风险。
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引用次数: 2
Improving Crop Yields in Sub-Saharan Africa - What Does the East African Data Say 提高撒哈拉以南非洲的作物产量——东非的数据说明了什么
Pub Date : 2020-06-01 DOI: 10.5089/9781513546223.001
A. Thomas
Recent micro level data from East Africa is used to benchmark aggregate data and assess the role of agricultural inputs in explaining variation in crop yields on smallholding plots. Fertilizer, improved seeds, protection against erosion and pesticides improve crop yields in Rwanda and Ethiopia, but not Uganda, possibly associated with lack of use there. With all positive yield determinants in place, wheat and maize yields could increase fourfold. The data hints at the negative effect of climate change on yields and the benefits of accompanying measures to mitigate its adverse impact (access to finance and protection against erosion). The adverse effect of crop damage on yields varies between 12/13 percent (Rwanda, Uganda) to 36 percent (Ethiopia). Protection against erosion and investment financing mitigate these effects considerably.
最近来自东非的微观层面数据被用来作为总体数据的基准,并评估农业投入在解释小块土地作物产量变化方面的作用。在卢旺达和埃塞俄比亚,肥料、改良种子、防止侵蚀和杀虫剂提高了作物产量,但在乌干达却没有,这可能与那里缺乏使用有关。有了所有积极的产量决定因素,小麦和玉米的产量可以增加四倍。这些数据暗示了气候变化对产量的负面影响,以及减轻其负面影响的配套措施(获得资金和防止侵蚀)的好处。作物受损对产量的不利影响从12% / 13%(卢旺达、乌干达)到36%(埃塞俄比亚)不等。防止侵蚀和投资融资的措施大大减轻了这些影响。
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引用次数: 9
Reducing the Cost of Delay: On the Interaction of Cap-and-Trade and Subsidies for Clean Energy 减少延迟成本:限额与交易与清洁能源补贴的相互作用
Pub Date : 2020-05-01 DOI: 10.2139/ssrn.3580673
O. Tietjen
Relying on theoretical and numerical modeling I show that subsidies for clean energy can be welfare enhancing even if a cap-and-trade (CAT) program is already in place and if there is only the carbon externality. The growth rate of the permit price in the CAT program is too high if intertemporal permit trading is unconstrained implying too low prices early on. Without affecting the permit price, optimal subsidies shift some of the resulting excessive emissions to the future and thereby postpone carbon damages. However, the optimal subsidy path is not time consistent. The Markovian subsidy has a permit price reducing effect but is still welfare enhancing compared to a CAT-only policy. Subsidies also reduce the permit price volatility and stabilize the abatement path. In this sense, subsidies can be a reasonable second-best alternative if ideal CAT programs (e.g. with permit price collars) are not available.
依靠理论和数值模型,我表明,即使已经实施了限额与交易(CAT)计划,并且只有碳外部性,对清洁能源的补贴也可以提高福利。如果跨期许可交易不受约束,意味着早期价格过低,则CAT计划中许可价格的增长率过高。在不影响许可价格的情况下,最优补贴将导致的部分过度排放转移到未来,从而推迟碳损害。然而,最优补贴路径并不具有时间一致性。马尔可夫补贴具有降低许可证价格的效果,但与仅限cat的政策相比,仍能提高福利。补贴也减少了许可价格的波动,稳定了减排路径。从这个意义上说,如果没有理想的CAT计划(如许可证价格限制),补贴可能是一个合理的次优选择。
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引用次数: 0
Modeling of the Transport and Production Complex in the Growing of Agricultural Crops, Taking Into Account the Aviation Component 考虑到航空成分的农业作物生长中运输和生产综合体的建模
Pub Date : 2020-04-30 DOI: 10.15587/1729-4061.2020.198742
S. Pron, O. Soloviova, I. Herasymenko, Iryna Borets
Studies of the transport and technological process of growing crops revealed that it is a complex dynamic system. It is proved that the complexity of this system consists in the presence of a large number of heterogeneous subsystems, including transport, which is an important component for growing crops. Due to the system approach to the study of transport support of the crop growing process, it became possible to identify functional features of using ground and aviation vehicles. The properties of each stage of the growing process and involvement of certain types of vehicles are determined. The scheme of transport support of the crop growing process is developed and the influence of the aviation component at certain stages in the introduction of resource-saving No-till technology is determined. Experimental studies showed that the use of aviation transport contributes to the introduction of resource-saving No-till technology by minimizing the mechanical processing of sown areas, which reduces the  anthropogenic load on the soil. The developed mathematical model for analyzing the use of the transport and production complex in growing crops allows making a rational choice of ground and aviation vehicles, depending on the parameters of technologies, types of crops. Thus, there is reason to argue that it is possible to make timely and reasonable management decisions in the organization and management of agricultural production in order to maximize profits
对作物生长过程和运输过程的研究表明,这是一个复杂的动态系统。证明了该系统的复杂性在于存在大量异构子系统,其中包括运输子系统,运输子系统是种植作物的重要组成部分。由于采用系统方法研究作物生长过程的运输支持,因此有可能确定使用地面和航空车辆的功能特征。确定了生长过程中每个阶段的性质和某些类型车辆的参与。制定了作物生长过程的运输支持方案,确定了在引入资源节约型免耕技术的某些阶段航空成分的影响。试验研究表明,利用航空运输有助于引入资源节约型免耕技术,减少了播种区域的机械加工,减少了土壤的人为负荷。开发的数学模型用于分析作物种植中运输和生产综合体的使用情况,允许根据技术参数和作物类型合理选择地面和航空交通工具。因此,我们有理由认为,在农业生产的组织和管理中,及时做出合理的管理决策,以实现利润最大化是可能的
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引用次数: 3
Clean Energy and Household Remittances in Bangladesh: Evidence from a Natural Experiment 孟加拉国的清洁能源和家庭汇款:来自自然实验的证据
Pub Date : 2020-04-16 DOI: 10.2139/ssrn.3577362
Gazi Hassan
Using a natural experiment of a rainfall-driven remittances, I provide experimental measures of how remittances affect rural household’s choice of cylinder gas (LPG) as a cooking fuel over other alternative fuels in southern Bangladesh. Household choice of LPG and remittances are jointly related; therefore, I use the instrumental variable probit (IV-Probit) approach. The treatment of remittances is randomly assigned to households who suffered losses due to a natural shock from the cyclone-Roanu enabling the instrument – exogenous variation in rainfall interacted with cyclone-affected migrant household’s distance to the local weather stations – to identify the average treatment effect for the treatment group (cyclone-affected remittances recipient households). I find that an exogenous increase in remittances by 1,000 Taka causes the probability of using LPG to rise by 1%. In terms of percentage change, the implied elasticity shows that a 10% increase in remittances income can raise the probability of using LPG by 2%. I also find the impact of remittances is conditional on household’s health expenditures. In particular, controlling for the household’s health expenditures interacted with the provision for clean water and sanitary toilet in the dwelling, the marginal effects of remittances get stronger, i.e. households are more likely to use LPG as cooking fuel. These findings counter some existing case studies and views of many policy makers that economic factors are less significant in promoting cleaner energy for the household. The results of the paper are robust to potential violations of the exclusion restriction, to alternative specifications and instruments, and possible omitted variable bias.
我利用降雨驱动汇款的自然实验,提供了实验性的测量方法,以了解汇款如何影响孟加拉国南部农村家庭选择气瓶(液化石油气)作为烹饪燃料,而不是其他替代燃料。家庭选择液化石油气与汇款是共同相关的;因此,我使用工具变量probit (IV-Probit)方法。汇款的处理被随机分配给因飓风roanu造成的自然冲击而遭受损失的家庭,使该工具——降雨量的外生变化与受飓风影响的移民家庭与当地气象站的距离相互作用——能够确定治疗组(受飓风影响的汇款接收家庭)的平均治疗效果。我发现,外生汇款增加1,000塔卡会导致使用液化石油气的可能性增加1%。就百分比变化而言,隐含弹性表明,汇款收入每增加10%,使用液化石油气的可能性就会提高2%。我还发现,汇款的影响取决于家庭的卫生支出。特别是,考虑到家庭的保健支出与提供住宅中的清洁水和卫生厕所的相互作用,汇款的边际效应变得更强,即家庭更有可能使用液化石油气作为烹饪燃料。这些发现反驳了一些现有的案例研究和许多决策者的观点,即经济因素在促进家庭使用清洁能源方面不那么重要。本文的结果对排除限制的潜在违反,替代规格和仪器,以及可能省略的变量偏差具有鲁棒性。
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引用次数: 3
期刊
Econometric Modeling: Agriculture
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