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Technical Efficiency of Farms in Poland According to Their Sizes and Types 波兰不同规模和类型农场的技术效率
Pub Date : 2019-12-18 DOI: 10.30858/zer/115188
A. Kagan
The article presents technical efficiency of the use of production resources for the research sample of the Polish FADN, representing the general population of agricultural holdings, representing over 90% of domestic commercial production. The impact of the size of activity measured by the utilised agricultural area and standard output (economic size), and of the production type on the efficiency was examined. In all cases, non-linear relationships were found, and the technical efficiency curve for grouping characteristics based on the size of the activity took the U shape. Therefore, deviations from the shape of these relations observed in numerous studies may result not only from the selection of the measurement method, but also from the lack of representativeness for the entire agrarian structure of researched farms. Assessing the impact of production orientation on technical efficiency without taking into account the diversity of groups in terms of the size of activity, especially with different assignments to different classes of economic size, in many cases may lead to erroneous conclusions.
本文以波兰FADN为研究样本,展示了生产资源利用的技术效率,代表了农业控股的一般人口,占国内商业生产的90%以上。考察了利用农业面积和标准产出(经济规模)衡量的活动规模以及生产类型对效率的影响。在所有情况下,都发现了非线性关系,并且基于活动规模的分组特征的技术效率曲线呈U形。因此,在许多研究中观察到的这些关系的形状出现偏差,可能不仅是因为测量方法的选择,而且还因为所研究农场的整个农业结构缺乏代表性。在评估生产导向对技术效率的影响时,如果不考虑到不同群体在活动规模方面的差异,特别是对不同经济规模类别的不同分配,在许多情况下可能会导致错误的结论。
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引用次数: 2
Tariffs and Retaliation: A Climate Point of View 关税和报复:气候观点
Pub Date : 2019-12-12 DOI: 10.2139/ssrn.3502615
Takumi Haibara
This paper identifies a mechanism through which trade restrictions and counter-restrictions affect the climate. A series of tariffs and retaliatory export taxes increases the level of global emissions if a country using export taxes obtains considerable real income gains from local air pollution reduction. As a related result, it is shown that under certain conditions, Home tariffs alone reduce global pollution emissions, whereas a combination of Home tariffs and Foreign production taxes increases these emissions. The results here have alarming implications. Second-best policies can provoke trade disputes and are harmful to the climate.
本文确定了贸易限制和反限制影响气候的机制。如果一个使用出口税的国家从减少当地空气污染中获得可观的实际收入收益,那么一系列关税和报复性出口税就会增加全球排放水平。相关结果表明,在某些条件下,国内关税单独减少了全球污染排放,而国内关税和外国生产税的组合则增加了这些排放。这里的结果有令人担忧的含义。次优政策可能引发贸易争端,对气候有害。
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引用次数: 1
Financial Risk Management in Agriculture: Analyzing Data from a New Module of the Global Findex Database 农业金融风险管理:基于全球Findex数据库新模块的数据分析
Pub Date : 2019-12-11 DOI: 10.1596/1813-9450-9078
Leora F. Klapper, Dorothe Singer, Saniya Ansar, Jake Hess
The ability to manage financial risk is especially important for people earning their living through agriculture. Many farmers only get paid once or twice a year, and households need to stretch their earnings across the year by saving or borrowing money. Moreover, agricultural production faces a variety of risks related to both production and markets because of their exposure to weather and disease shocks. Households engaged in agriculture may thus especially benefit from financial inclusion—access to and use of formal financial services. This paper explores the topic of financial risk management in agriculture—how adults who rely on growing crops or raising livestock as their household's main source of income manage financial risk and use financial services. The paper summarizes new data based on a nationally representative survey of about 15,000 adults in 15 lower-middle- and low-income Sub-Saharan African economies collected as part of the World Bank's Global Findex database. The majority of these adults reported suffering a bad harvest or significant livestock loss in the past five years, and most bear the entire financial risk of such a loss. Most adults in agricultural households lack the financial tools -- such as insurance, accounts, savings, and credit -- that could help them manage financial risks.
管理金融风险的能力对以农业为生的人尤为重要。许多农民一年只能得到一到两次报酬,家庭需要通过储蓄或借贷来延长全年的收入。此外,农业生产面临着与生产和市场有关的各种风险,因为它们容易受到天气和疾病的冲击。因此,从事农业的家庭可能特别受益于普惠金融,即获得和使用正规金融服务。本文探讨了农业金融风险管理的主题——依赖种植作物或饲养牲畜作为家庭主要收入来源的成年人如何管理金融风险和使用金融服务。本文总结了一项具有全国代表性的调查的新数据,该调查对撒哈拉以南非洲15个中低收入经济体的约1.5万名成年人进行了调查,这些调查是世界银行全球经济发展指数数据库的一部分。这些成年人中的大多数报告说,在过去五年中遭受了歉收或牲畜的重大损失,其中大多数人承担了这种损失的全部经济风险。大多数农业家庭的成年人缺乏可以帮助他们管理金融风险的金融工具,如保险、账户、储蓄和信贷。
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引用次数: 3
Forecasting Electricity Generation: An AR(1) Approach 发电量预测:AR(1)方法
Pub Date : 2019-11-30 DOI: 10.2139/ssrn.3495737
D. Maroney
This paper outlines a method to forecast electricity generation (Gigawatt hours, GWh). The in-sample data set consists of yearly electricity generation (GWh) by OECD countries for the period 1999 to 2017. The out-sample period consists of electricity generation for the year 2018. Partial-Autocorrelation Function (PACF) tests reveal that the most appropriate Autoregressive model depends on the country concerned. For 72% of countries an AR(1) is applicable and is the focus of this research. A combination of AIC and Log-Likelihood criteria as well as a sigma squared measure are then applied to determine the countries that best fit the AR(1) model. The 31 countries selected using the PACF were sorted using the criteria. Applying the relevant AR(1) models to the out-sample data highlighted that there is some support for AIC, Log-Likelihood and sigma squared measures as accurate predictors of forecast accuracy for an AR(1) model when applied to electricity generation data for OECD countries. This result holds particularly for low model values (best fit) where forecast accuracy is greatest and after sorting the data into quartiles based on AIC measures for the forecast error measure as opposed to the mean percentage error measure.
本文概述了一种预测发电量(千兆瓦时,GWh)的方法。样本内数据集由经合组织国家1999年至2017年的年发电量(GWh)组成。外样本期包括2018年的发电量。部分自相关函数(PACF)检验表明,最合适的自回归模型取决于相关国家。对于72%的国家来说,AR(1)是适用的,这是本研究的重点。然后应用AIC和对数似然标准的组合以及西格玛平方测量来确定最适合AR(1)模型的国家。使用PACF选择的31个国家是根据这些标准进行排序的。将相关的AR(1)模型应用于外样本数据强调,当应用于经合组织国家的发电数据时,AIC、对数似然和西格玛平方测量作为AR(1)模型预测精度的准确预测因子得到了一些支持。这一结果尤其适用于预测精度最高的低模型值(最佳拟合),并且在基于预测误差度量的AIC度量(而不是平均百分比误差度量)将数据分类为四分位数之后。
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引用次数: 0
Wind Turbine Shutdowns and Upgrades in Denmark: Timing Decisions and the Impact of Government Policy 丹麦的风力涡轮机关闭和升级:时机决定和政府政策的影响
Pub Date : 2019-10-20 DOI: 10.2139/ssrn.3336341
Jonathan A Cook, C.-Y. Cynthia Lin Lawell
Shutting down and/or upgrading existing productive assets are important economic decisions for the owners of those assets and are also the fundamental decisions that underlie the development of new, growing industries. This paper develops a dynamic structural econometric model of wind turbine owners' decisions about whether and when to add new turbines to a pre-existing stock, scrap an existing turbine, or replace old turbines with newer versions (i.e., upgrade). We apply our model to owner-level panel data for Denmark over the period 1980-2011 to estimate the underlying profit structure for wind producers and evaluate the impact of technology and government policy on wind industry development. Our structural econometric model explicitly takes into account the dynamics and interdependence of shutdown and upgrade decisions and generates parameter estimates with direct economic interpretations. Results from the model indicate that the growth and development of the Danish wind industry was primarily driven by government policies as opposed to technological improvements. The parameter estimates are used to simulate counterfactual policy scenarios in order to quantify the e ectiveness of the Danish feed-in-tari and replacement certificate programs. Results show that both of these policies significantly impacted the timing of shutdown and upgrade decisions made by turbine owners and accelerated the development of the wind industry in Denmark. We also find that when compared with the feed-in-tari ; a declining feed-in-tari ; and the replacement certificate program and the feed-in-tari combined, the replacement certificate program was the most cost-e ective policy both for increasing payo s to turbine owners and also for decreasing carbon emissions.
关闭和/或升级现有的生产性资产对这些资产的所有者来说是重要的经济决策,也是新兴行业发展的基础决策。本文开发了一个动态结构计量经济模型,用于风力涡轮机所有者是否以及何时在已有的库存中添加新涡轮机,报废现有涡轮机,或用新版本替换旧涡轮机(即升级)的决策。我们将我们的模型应用于丹麦1980-2011年期间的业主级面板数据,以估计风电生产商的潜在利润结构,并评估技术和政府政策对风电产业发展的影响。我们的结构计量经济模型明确考虑了关停和升级决策的动态和相互依赖性,并产生了具有直接经济解释的参数估计。该模型的结果表明,丹麦风能产业的增长和发展主要是由政府政策推动的,而不是技术改进。参数估计用于模拟反事实政策情景,以量化丹麦电价补贴和替代证书计划的有效性。结果表明,这两项政策都显著影响了风机业主的停机和升级决策,加速了丹麦风电产业的发展。我们还发现,当与饲料饲料相比;电价下降;替换证书计划和上网电价相结合,替换证书计划是最具成本效益的政策既增加了对涡轮机所有者的支付,也减少了碳排放。
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引用次数: 15
The Legal and Economic Case for an Auction Reserve Price in the EU Emissions Trading System 欧盟排放交易体系中拍卖保留价的法律和经济案例
Pub Date : 2019-10-08 DOI: 10.2139/ssrn.3477716
C. Fischer, L. Reins, D. Burtraw, D. Langlet, Åsa Löfgren, M. Mehling, Stefan E. Weishaar, L. Zetterberg, Harro van Asselt, K. Kulovesi
When it was launched in 2005, the European Union emissions trading system (EU ETS) was projected to have prices of around €30/ton CO2 and to be a cornerstone of the EU’s climate policy. The reality was a cascade of falling prices, a ballooning privately held emissions bank, and a decade of low prices providing inadequate incentive to drive investment in the technologies and innovation necessary to achieve long-term climate goals. The European Commission responded with administrative measures, including postponing the introduction of allowances (backloading) and using a quantity-based criterion for regulating future allowance sales (the market stability reserve); although prices are beginning to recover, it is far from clear whether these measures will adequately support the price into the future. In the meantime, governments have been turning away from carbon pricing and adopting overlapping regulatory measures that reinforce low prices and further undermine the confidence in market-based approaches to addressing climate change. The solution in other carbon markets has been the introduction of a reserve price that would set a minimum price in allowance auctions. Opponents of an auction reserve price in the EU ETS have expressed concern that a minimum auction price would interfere with economic operations in the market or would be tantamount to a tax, which would trigger a decision rule requiring unanimity among EU Member States. This Article reviews the economic and legal arguments for and against an auction reserve price. Our economic analysis concludes that an auction reserve price is necessary to accommodate overlapping policies and for the allowance market to operate efficiently. Our legal analysis concludes that an auction reserve price is not a “provision primarily of a fiscal nature,” nor would it “significantly affect a Member State’s choice between different energy sources.” We describe pathways through which a reserve price could be introduced.
欧盟排放交易体系(EU ETS)于2005年启动时,预计每吨二氧化碳的价格约为30欧元,并将成为欧盟气候政策的基石。现实情况是,价格不断下跌,私人持有的排放银行不断膨胀,而十年的低价格没有提供足够的动力来推动对实现长期气候目标所必需的技术和创新的投资。欧盟委员会采取了行政措施作为回应,包括推迟引入配额(backloading),并使用基于数量的标准来规范未来的配额销售(市场稳定储备);尽管价格开始回升,但这些措施能否在未来充分支撑价格还远不清楚。与此同时,各国政府一直在放弃碳定价,转而采取重叠的监管措施,这些措施强化了低碳价格,并进一步削弱了人们对以市场为基础的方法应对气候变化的信心。其他碳市场的解决方案是引入底价,在配额拍卖中设定最低价格。反对在欧盟排放交易体系中设置拍卖底价的人士表示,他们担心最低拍卖价格会干扰市场的经济运行,或者相当于征税,从而触发一项需要欧盟成员国一致同意的决策规则。本文回顾了支持和反对拍卖保留价的经济和法律论据。我们的经济分析得出结论,拍卖底价是必要的,以适应重叠的政策,并使配额市场有效运作。我们的法律分析得出的结论是,拍卖底价不是“主要具有财政性质的条款”,也不会“显著影响成员国在不同能源之间的选择”。我们描述了引入保留价格的途径。
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引用次数: 16
Ecosystems and Human Health: The Local Benefits of Forest Cover in Indonesia 生态系统与人类健康:印度尼西亚森林覆盖的地方效益
Pub Date : 2019-10-08 DOI: 10.2139/ssrn.3010785
Teevrat Garg
Abstract This paper documents the effect of primary forest cover loss on increased incidence of malaria. The evidence is consistent with an ecological response. I show that land use change, anti-malarial programs or migration cannot explain the effect of primary forest cover loss on increased malarial incidence. Falsification tests reveal that the effect is specific to malaria, with forest cover having no discernible effect on other diseases with a disease ecology different from that of malaria. Back-of-the-envelope calculations indicate that the morbidity-related malaria-reducing local benefits of primary forests are at least $1-$2 per hectare.
摘要本文研究了原始森林覆盖减少对疟疾发病率增加的影响。证据与生态反应是一致的。我表明,土地利用变化、抗疟疾项目或移民不能解释原始森林覆盖丧失对疟疾发病率上升的影响。证伪检验表明,这种影响只针对疟疾,森林覆盖对其他疾病生态与疟疾不同的疾病没有明显的影响。粗略计算表明,原始森林在减少疟疾发病率方面的当地效益至少为每公顷1至2美元。
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引用次数: 41
The Electric Gini: Income Redistribution Through Energy Prices 电力基尼系数:通过能源价格的收入再分配
Pub Date : 2019-10-01 DOI: 10.3386/w26385
Arik Levinson, Emilson Delfino Silva
In theory, regulators concerned about inequality will deviate from efficient two-part tariffs, charging lower-than-efficient fixed monthly fees and higher-than-efficient per-kilowatt-hour prices. To quantify that relationship, we develop a measure of the redistributive extent of utility tariffs: the “electric Gini.” Utilities with higher electric Ginis shift more costs from households using relatively little electricity to households using more. In practice, US utilities whose ratepayers have more unequal incomes have higher electric Ginis. But electricity demand is only loosely correlated with income, which means that electricity prices are an indirect and ineffective policy for countering income inequality. (JEL D31, L11, L94, L98)
从理论上讲,担心不平等的监管机构将偏离有效的两部分电价,收取低于有效的固定月费和高于有效的每千瓦时价格。为了量化这种关系,我们开发了一种衡量公用事业关税再分配程度的方法:“电力基尼系数”。电力基尼系数较高的公用事业公司将更多的成本从用电相对较少的家庭转移到用电较多的家庭。实际上,纳税人收入不平等程度越高的美国公用事业公司,其电力基尼系数就越高。但电力需求与收入之间的关系并不紧密,这意味着电价是一种间接的、无效的政策,无法消除收入不平等。(jel 31, 2011, 1994, 1998)
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引用次数: 23
Does Agricultural Insurance Premium Subsidy Benefit the Primary Industry? 农业保险费补贴对第一产业有利吗?
Pub Date : 2019-10-01 DOI: 10.2139/ssrn.3468412
Yugang Ding, Chengjiu Sun
Whether the agricultural insurance has positive impacts on the primary industry has been debated for decades of years. This paper studies this question based on the policy-based agricultural insurance implementation in 2007 in China. We conduct difference in difference analysis and event study estimation. We find that the premium subsidy policy has significantly positive effects on the primary industry. This policy increases the primary industry production by 1310 yuan per person in the pilot provinces, compared to the non-pilot provinces. Among four sub-industries in the primary industry, the policy mainly affects the agriculture, especially the crops production.
农业保险对第一产业是否有积极的影响已经争论了几十年。本文以2007年中国政策性农业保险实施为背景,对这一问题进行了研究。我们在差异分析和事件研究估计中进行差异分析。研究发现,溢价补贴政策对第一产业具有显著的正向影响。与非试点省份相比,该政策使试点省份的第一产业人均产值增加了1310元。在第一产业的四个子产业中,政策主要影响农业,尤其是农作物生产。
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引用次数: 0
Demand for Ground Transportation Fuels in 10 Asian Countries: An Application of the Autoregressive Distributed Lag Bounds Testing Approach 10个亚洲国家对地面运输燃料的需求:自回归分布滞后边界检验方法的应用
Pub Date : 2019-10-01 DOI: 10.1111/1468-0106.12245
Wenhua Liu, Ka Lin
This study applies the recently developed autoregressive distributed lag bounds testing approach to investigate demands for gasoline and diesel in the ground transportation sectors of 10 Asian countries from 1983 to 2013. Results reveal an inelastic fuel demand with respect to price, except in Hong Kong. This relation implies that the government is unable to limit fuel consumption by controlling price. Moreover, fuel demand with respect to income is generally greater than price elasticity. In other words, if the growth of the national income is faster than that of fuel price, fuel consumption will continually increase. Long‐term income elasticity is greater than unity in half of the examined countries. The demand for transportation fuel in these countries is expected to grow at a rate faster than the growth of GDP over a wide range of economies in Asia, with the implication that the concern regarding the scarcity of fossil fuel is not misplaced.
本研究采用近年来发展的自回归分布滞后边界检验方法,调查了1983 - 2013年10个亚洲国家地面交通部门对汽油和柴油的需求。结果显示,燃料需求在价格方面缺乏弹性,香港除外。这种关系意味着政府不能通过控制价格来限制燃料消耗。此外,燃料需求与收入的关系通常大于价格弹性。换句话说,如果国民收入的增长快于燃料价格的增长,燃料消费将不断增加。在接受调查的国家中,有一半国家的长期收入弹性大于统一性。预计这些国家对运输燃料的需求增长速度将超过亚洲许多经济体的国内生产总值增长速度,这意味着对化石燃料短缺的担忧并非没有道理。
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引用次数: 0
期刊
Econometric Modeling: Agriculture
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