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Modelling yield distribution for parametric crop insurance 参数化作物保险产量分布建模
Pub Date : 2021-09-20 DOI: 10.2139/ssrn.3927026
Eric Dal Moro
In developing countries, crop insurance is a major factor of sustainability for farming business. Due to the lack of infrastructure and of claims experts in these regions, parametric crop insurance is the favorite way of providing insurance. Parametric insurance has the advantage of reducing the moral hazard and the difficulty to reach remote locations when it comes to estimating indemnification. In this context, it is important to be able to model properly the yield distributions, such distribution being at the heart of the insurance pricing. This article proposes a way to derive general characteristics of the crop yields based on first principles.
在发展中国家,农作物保险是农业业务可持续性的一个主要因素。由于这些地区缺乏基础设施和理赔专家,参数作物保险是最受欢迎的保险方式。参数保险的优点是减少道德风险和难以到达偏远地区,当涉及到估计赔偿。在这种情况下,能够正确地建立收益率分布模型是很重要的,这种分布是保险定价的核心。本文提出了一种基于第一性原理推导作物产量一般特征的方法。
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引用次数: 0
The Mercurial Commitment: Revisiting the Unintended Consequence of Military Humanitarian Intervention and Anti-atrocity Norms 反复无常的承诺:重新审视军事人道主义干预和反暴行规范的意外后果
Pub Date : 2021-09-16 DOI: 10.2139/ssrn.3522870
Hiroto Sawada
Why do some rebel groups, who expect third parties to militarily intervene on their behalf, commit provocative violence while others do not? If armed conflict is costly, an incumbent government that faces increasing demands from a rebel group that is backed by a third party should offer a concession that the rebel is likely to accept. Existing theories have been unable to fully explain why some rebel groups still provoke the government, despite the possibility of government concessions. I argue that the expected impact on the local balance of power caused by humanitarian intervention tends to be temporary and that this temporariness of the expected shift in power causes a commitment problem. It generates a "now-or-never" effect and leads the rebel to commit provocative violence to induce the government retaliation and humanitarian intervention before the "window of opportunity" closes. I demonstrate this by developing a simple game model in which a rebel group, the government and an intervening party interact. Simple comparative statics suggest that decreasing the cost of international intervention can have a pacifying effect by making the potential rebel and the incumbent government more resilient to fluctuation of feasibility of intervention. NATO’s intervention in Libya aptly illustrates the core logic of the theory.
为什么一些期望第三方代表他们进行军事干预的反叛组织会实施挑衅性暴力,而另一些则不会?如果武装冲突代价高昂,那么面对由第三方支持的反叛组织提出的越来越多的要求,现任政府应该提供一个反对派可能接受的让步。现有的理论无法完全解释为什么尽管政府可能做出让步,一些反叛组织仍在挑衅政府。我认为,人道主义干预对地方权力平衡的预期影响往往是暂时的,而这种预期的权力转移的临时性导致了承诺问题。它产生了一种“现在或永远”的效果,并导致叛军在“机会之窗”关闭之前实施挑衅性暴力,以诱导政府报复和人道主义干预。我通过开发一个简单的游戏模型来证明这一点,在这个模型中,反叛组织、政府和干预方相互作用。简单的比较静态数据表明,降低国际干预的成本可以通过使潜在的叛乱分子和现任政府更能适应干预可行性的波动而产生安抚作用。北约对利比亚的干预恰当地说明了这一理论的核心逻辑。
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引用次数: 0
Financing the Fossil Fuel Phase-Out 为逐步淘汰化石燃料提供资金
Pub Date : 2021-08-11 DOI: 10.2139/ssrn.3903026
Boyan Yanovski, K. Lessmann
This paper models how key technological and financial aspects of a potential fossil fuel phase-out interact in a stylized setting. In the energy generation part of the model, the substitutability between green and dirty energy is endogenized such that firms can invest into substitutability enhancing infrastructure that allows for a fossil fuel phase-out to take place for reasonable carbon tax schedules. We find that, if substitutability improvements in the final energy generation process, involving green and dirty energy, are physically and economically feasible, there will be a technological tipping point that is triggered at some level of climate policy (carbon price or green energy subsidies) after which a rapid decarbonization of the energy sector becomes possible. Equipped with this mechanism for phasing out the fossil fuel sector, we consider the financial implications of key stylized facts, like the high capital intensity of renewables, and find that, in the presence of performance-based lending, the need for a fast accumulation of green capital during the transition can slow down the phase-out and can potentially lead to financial instability. To ensure a swift and robust transition, direct supportive policy measures for renewables can be used, which, depending on technological developments, might need to be permanent.
本文模拟了潜在的化石燃料逐步淘汰的关键技术和财务方面如何在程式化设置中相互作用。在该模型的能源生产部分,绿色能源和肮脏能源之间的可替代性是内生的,因此企业可以投资于可替代性增强的基础设施,从而允许化石燃料逐步淘汰,以实现合理的碳税时间表。我们发现,如果最终能源生产过程(包括绿色能源和脏能源)的可替代性改进在物理上和经济上都是可行的,那么在某种程度上的气候政策(碳价格或绿色能源补贴)将触发一个技术临界点,在此之后,能源部门的快速脱碳成为可能。有了这一逐步淘汰化石燃料部门的机制,我们考虑了可再生能源的高资本密集度等关键风定化事实的金融影响,并发现,在基于绩效的贷款存在的情况下,转型期间对绿色资本快速积累的需求可能会减缓逐步淘汰的速度,并可能导致金融不稳定。为了确保快速而有力的转型,可再生能源可以采用直接的支持性政策措施,根据技术发展,这些措施可能需要是永久性的。
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引用次数: 0
Regret-Free Truth-Telling in School Choice with Consent 在同意的情况下,无悔地说出学校选择的真相
Pub Date : 2021-07-30 DOI: 10.2139/ssrn.3896306
Yiqiu Chen, Markus Möller
The Efficiency Adjusted Deferred Acceptance Matching Rule (EDA) is a promising candidate mechanism for public school assignment. A potential drawback of EDA is that it could encourage students to game the system since it is not strategy-proof. However, to successfully strategize, students typically need information that is unlikely to be available to them in practice. We model school choice under incomplete information and show that EDA is regret-free truth-telling, which is a weaker incentive property than strategy-proofness and was introduced by Fernandez (2020). We also show that there is no efficient matching rule that Pareto dominates a stable matching rule and is regret-free truth-telling.
效率调整延迟录取匹配规则(EDA)是一种很有前途的公立学校分配候选机制。EDA的一个潜在缺点是,它可能会鼓励学生在系统中玩游戏,因为它不是策略可靠的。然而,为了成功地制定策略,学生通常需要在实践中不太可能获得的信息。我们对不完全信息下的学校选择进行了建模,并表明EDA是无遗憾的实话实说,这是Fernandez(2020)引入的一种比策略验证性更弱的激励属性。我们也证明了没有有效的匹配规则,帕累托优于稳定的匹配规则,并且是无悔的实话实说。
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引用次数: 4
Promoting Cooperation in Collective Actions: Evidence from the Reserve Fund for Maintenance in China 促进集体行动中的合作:来自中国维护储备基金的证据
Pub Date : 2021-06-23 DOI: 10.2139/ssrn.3916078
Tao Li, Hao Li, Jin Di Zheng
Cooperation among group members is the ultimate pursuit in any collective actions. We examine the collective tasks of approving the use of a reserve fund for maintaining facilities covering approximately 5,000 projects and 635 communities in Nanjing, China. In these communities, any maintenance projects that are covered by the Reserve Fund for Maintenance (RFM) need to be approved by the households. Once the RFM is insufficient to cover, households should be notified about the situation and pay in cash by themselves. We focus on the effect of insufficient RFM on the approval rates of maintenance projects. Using an instrumental variable approach, we show that a 1,000 yuan increase in extra cash payment will increase the consent rates of implementing a maintenance plan by approximately 1.04%. Our results suggest that additional information revealed by RFM-uncovered maintenance costs could be a potential mechanism to promote cooperation in making public maintenance decisions by surveying 112 householders involved in the maintenance projects.
团队成员之间的合作是任何集体行动的最终追求。我们研究了批准使用储备基金来维护中国南京约5,000个项目和635个社区的设施的集体任务。在这些社区,任何由维修储备基金(RFM)支付的维修项目都需要得到家庭的批准。一旦RFM不足以支付,应通知家庭有关情况,并由家庭自行支付现金。我们关注的是RFM不足对维修项目批准率的影响。使用工具变量方法,我们发现每增加1000元的额外现金支付将使实施维护计划的同意率提高约1.04%。通过对112户参与维修项目的家庭进行调查,我们的研究结果表明,rfm未覆盖的维修成本所揭示的额外信息可能是促进公共维修决策合作的潜在机制。
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引用次数: 0
Platform Power and Regulatory Politics: Polanyi for the 21st Century 平台权力与监管政治:21世纪的波兰
Pub Date : 2021-06-03 DOI: 10.2139/ssrn.3859075
J. Cioffi, M. Kenney, J. Zysman
The rapid rise, expansion, and growing asymmetric power of online platform firms towards other businesses, labor and even the state itself occurred in a context of minimal regulatory oversight. In many respects, because the existing legal system was handicapped in understanding and regulating the new platform business models. The platform firms undermined traditional industry boundaries and developed surprising synergies by expanding in unexpected ways due to their ability leverage data and computational expertise. The growth of these platforms was accompanied by minimal intervention by state actors until recently, as concerns about the platform firms’ remarkable power has attracted the concern of States globally and the previous regime is giving way to intense debate and increasingly interventionist governmental policies and enforcement actions.

We examine several salient aspects of this emerging regulatory and political reaction, and suggest that this represents an attempt to rebalance the positions of social groups in their relationship to the increasingly central platform firms. First, we view the rise of, and recent political responses to, the often-predatory power and manipulative conduct of platform firm in terms of a “Polanyian” double movement in which the destabilizing and destructive effects of unchecked corporate power and market development eventually generates political and regulatory responses to constrain private actions by new economic actors as they threaten the social, political, and economic order. Second, incipient legal changes, most notably the EU’s proposed Digital Markets Act and Digital Services Act, indicate a shift in regulatory emphasis from competition (and antitrust) policy and law, which has proven limited in its capacity to address inherent monopolistic tendencies of platform firms and markets, towards more intensive and encompassing forms of social and economic regulation. Finally, the political dynamics of legal and institutional change open up new possibilities for political economic and societal reordering, but the particular changes will likely vary in character and significance across political jurisdictions, and therefore follow distinctive and possibly divergent developmental trajectories. We hypothesize that the EU may be able to become the first-mover in regulating the powerful multinational platform firms. We recognize that we are at the very beginning of a transformational process that is likely to reorder old and generate new political economic interests, identities, coalitions, and conflicts at the sectoral, national, regional, and international levels.
在线平台公司对其他企业、劳工甚至国家本身的迅速崛起、扩张和日益增长的不对称权力,都是在监管监督最少的背景下发生的。在许多方面,因为现有的法律体系在理解和规范新的平台商业模式方面存在障碍。由于平台公司利用数据和计算专业知识的能力,它们打破了传统的行业界限,并以意想不到的方式扩张,形成了令人惊讶的协同效应。这些平台的增长伴随着国家行为体的最小干预,直到最近,对平台公司显着权力的担忧引起了全球各国的关注,以前的政权正在让位于激烈的辩论和越来越多的干预主义政府政策和执法行动。我们研究了这种新兴监管和政治反应的几个突出方面,并认为这代表了一种重新平衡社会群体与日益核心的平台公司关系中的立场的尝试。首先,我们从“波兰式”双重运动的角度来看待平台公司掠夺性权力和操纵行为的兴起和最近的政治反应,在这种双重运动中,不受约束的公司权力和市场发展的不稳定和破坏性影响最终产生政治和监管反应,以限制新经济参与者的私人行为,因为他们威胁到社会、政治和经济秩序。其次,早期的法律变化,最值得注意的是欧盟提出的《数字市场法》和《数字服务法》,表明监管重点从竞争(和反垄断)政策和法律的转变,这已被证明在解决平台公司和市场固有垄断倾向方面的能力有限,转向更密集、更全面的社会和经济监管形式。最后,法律和制度变革的政治动态为政治、经济和社会的重新排序开辟了新的可能性,但具体的变化可能在不同的政治管辖范围内具有不同的性质和意义,因此遵循独特的、可能不同的发展轨迹。我们假设欧盟可能会成为监管强大的跨国平台公司的先行者。我们认识到,我们正处于一个变革过程的开端,这个过程可能会在部门、国家、地区和国际各级重新安排旧秩序,并产生新的政治经济利益、身份、联盟和冲突。
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引用次数: 6
The Disastrous Effects of Leaders in Denial: Evidence from the COVID-19 Crisis in Brazil 领导人否认的灾难性影响:来自巴西COVID-19危机的证据
Pub Date : 2021-04-28 DOI: 10.2139/ssrn.3836147
Sandro Cabral, N. Ito, L. Pongeluppe
The COVID-19 pandemic has shown the critical role of political leaders in influencing social behavior. Leaders in denial contributed to different outcomes regarding virus transmission. Mr. Jair Bolsonaro is the archetype of a leader in denial. The current president of Brazil made a sequence of television and radio speeches downplaying the severity of COVID-19 pandemic. The content of Mr. Bolsonaro's communications minimized the disease's effects, disregarded the importance of social distance, and stimulated the adoption of treatments without scientific proof of efficacy. Our analysis reveals different responses of the population to Mr. Bolsonaro's speeches. Municipalities in which Mr. Bolsonaro received the majority of votes in 2018 presidential election are more affected by COVID-19 cases and related deaths. This paper associates the denialist attitude of national leadership with his supporters' riskier behavior, leading to disastrous results in terms of lives lost.
2019冠状病毒病大流行显示了政治领导人在影响社会行为方面的关键作用。否认的领导人导致了病毒传播方面的不同结果。雅伊尔·博尔索纳罗(Jair Bolsonaro)是否认现实的领导人的典型。巴西现任总统发表了一系列电视和广播讲话,淡化了COVID-19大流行的严重性。博索纳罗的通信内容将疾病的影响最小化,忽视了社交距离的重要性,并刺激了没有科学有效性证据的治疗方法的采用。我们的分析揭示了民众对博尔索纳罗演讲的不同反应。博尔索纳罗在2018年总统选举中获得多数选票的城市受到COVID-19病例和相关死亡的影响更大。本文将国家领导人的否认态度与其支持者的冒险行为联系起来,从而导致灾难性的生命损失。
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引用次数: 23
Role of Non-Timber Forest Products in National Economy: A Case of Jajarkot District, Nepal 非木材林产品在国民经济中的作用:以尼泊尔贾贾科特地区为例
Pub Date : 2021-03-25 DOI: 10.2139/ssrn.3813767
Rakshya Lamichhane, D. Gautam, M. S. Miya, Hom Bahadur Chhetri, S. Timilsina
Non-timber forest products are the major source of income for mountainous countries like Nepal. This article attempts to explore a case of traded non-timber forest products (NTFPs) in Jajarkot district and its contribution to the economy. Collection of medicinal and aromatic plants (MAPs) and resin tapping are some of the major sources of employment for a large number of rural people. 53 different types of NTFPs are traded from the Jajarkot district. Local people collect these NTFPs from the forest and export them within and outside the district mainly to India and China. Jajarkot district on average exported 1,590,681.72 kg NTFPs worth NRs. 3,819,271.6 (equivalent to USD 32,081.88) from the year 2015 to 2020 to the national economy through royalty. NRs. 2,246,719.4 (equivalent to USD 18,872.44) per year came from MAPs and NRs. 1,572,552.2 (equivalent to USD 13,209.4) from resin during the years 2015 to 2020. If this district could produce all the commonly available NTFPs in a large scale, then there would be a high possibility of transforming the current unviable economy into a practical and vibrant economy. A proper inventory, identification and sustainable harvesting, are essential to promote and conserve these NTFPs.
非木材林产品是尼泊尔等山地国家的主要收入来源。本文试图探讨Jajarkot地区的非木材林产品交易案例及其对经济的贡献。药用和芳香植物(MAPs)的采集和树脂开采是大量农村人口的一些主要就业来源。从Jajarkot地区交易了53种不同类型的非森林产品。当地居民从森林中收集这些非森林植被,并将其出口到地区内外,主要是印度和中国。Jajarkot地区平均出口1,590,681.72公斤nntfps,价值卢比。从2015年到2020年,通过特许权使用费向国民经济贡献3,819,271.6美元(相当于32,081.88美元)。评分。每年有2,246,719.4(相当于18,872.44美元)来自map和nr。2015年至2020年期间,从树脂中获得1,572,552.2(相当于13,209.4美元)。如果这个地区能够大规模生产所有常见的非森林森林产品,那么将有很大的可能性将目前不可行的经济转变为实际和充满活力的经济。适当的清查、鉴定和可持续的收获对于促进和保护这些非森林覆盖区域至关重要。
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引用次数: 7
Overcoming Covid-19 Vaccine Hesitancy: The United States Faces a Steeper Uphill Struggle than the United Kingdom 克服Covid-19疫苗犹豫:美国面临比英国更艰难的斗争
Pub Date : 2021-03-21 DOI: 10.2139/ssrn.3898202
Bianca C. Reisdorf, Grant Blank, S. Cotten, Craig T. Robertson, Y. Argyris, M. Knittel, J. Bauer
This policy brief reports findings from two nationally representative online surveys that were conducted in the United States (N=2,280) and in the United Kingdom (N=2,000) in October and November 2020 to explore the factors that influence the willingness to be vaccinated against Covid-19. The study was conducted before vaccines were officially approved and on the market. However, it very closely tracks the actual developments in both countries through the summer of 2021. Findings suggest that socioeconomic factors, some very difficult to influence by policy in the short term, strongly shape the willingness to be vaccinated. In addition, the contested and divided political landscape and the highly competitive and fragmented media system in the United States help explain the findings. The surveys identify similarities but also major differences between the two countries. In the United States, 51% of the adult population said they were willing to be vaccinated against COVID-19, 28% were not, and 21% were undecided. In the United Kingdom, 71% of the adult population said they were willing to be vaccinated, 14% were not, and 15% were undecided. Race may be a major barrier to achieving high COVID-19 vaccination rates in the United States. Black respondents were 46% less willing to be vaccinated than White respondents. Gender may be a barrier to achieving high vaccination rates in the United States and United Kingdom. Women were 43% less willing to be vaccinated than men in the United States. They were 41% less willing than men to be vaccinated in the United Kingdom. Older individuals and those with higher income indicated a higher willingness to be vaccinated in both countries. Trust appears key to vaccination acceptance. Individuals with higher levels of trust in mass media were more willing to be vaccinated in both countries. Individuals with a higher general level of trust in others were more willing to be vaccinated in the United States. Medical information. Individuals who consulted medical sources were more willing to be vaccinated. Media sources. Reliance on conservative outlets, mainstream outlets, and television was not associated in a statistically significant way with the willingness to be vaccinated. Concern about getting COVID-19 is strongly associated with willingness to get vaccinated. Individuals who were more concerned about the pandemic indicated they were more willing to be vaccinated, but this effect was much stronger in the United Kingdom than in the United States. Overall, in the United States, the factors most strongly associated with willingness to be vaccinated are race (White), gender (male), age (older), income (higher), trust in mass media, and concern about getting coronavirus. In the United Kingdom, the factors most strongly associated with willingness to be vaccinated are gender (male), age (older), income (higher), trust in mass media, and concern about getting coronavirus. Race is not associated with the willingness to
本政策简报报告了2020年10月和11月在美国(2280人)和英国(2000人)进行的两项具有全国代表性的在线调查的结果,以探讨影响接种Covid-19疫苗意愿的因素。这项研究是在疫苗被正式批准并投放市场之前进行的。然而,它非常密切地跟踪到2021年夏天两国的实际发展。调查结果表明,社会经济因素在很大程度上决定了接种疫苗的意愿,其中一些因素在短期内很难受到政策的影响。此外,美国竞争激烈和分裂的政治格局以及高度竞争和碎片化的媒体系统有助于解释这些发现。调查发现了两国之间的相似之处,但也有重大差异。在美国,51%的成年人表示他们愿意接种COVID-19疫苗,28%的人不愿意,21%的人尚未决定。在英国,71%的成年人表示他们愿意接种疫苗,14%的人不愿意,15%的人尚未决定。种族可能是美国实现高COVID-19疫苗接种率的主要障碍。黑人受访者比白人受访者愿意接种疫苗的比例低46%。在美国和英国,性别可能是实现高疫苗接种率的障碍。在美国,女性接种疫苗的意愿比男性低43%。在英国,女性接种疫苗的意愿比男性低41%。在这两个国家,年龄较大的人和收入较高的人都表示更愿意接种疫苗。信任似乎是接受疫苗接种的关键。在这两个国家,对大众媒体信任度较高的个人更愿意接种疫苗。在美国,对他人总体信任度较高的人更愿意接种疫苗。医学信息。咨询医疗资源的个人更愿意接种疫苗。媒体资源。对保守媒体、主流媒体和电视的依赖与接种疫苗的意愿没有统计学上的显著联系。对感染COVID-19的担忧与接种疫苗的意愿密切相关。更担心流感大流行的人表示,他们更愿意接种疫苗,但这种影响在英国比在美国强得多。总体而言,在美国,与接种疫苗意愿最密切相关的因素是种族(白人)、性别(男性)、年龄(较大)、收入(较高)、对大众媒体的信任以及对感染冠状病毒的担忧。在英国,与愿意接种疫苗最密切相关的因素是性别(男性)、年龄(较大)、收入(较高)、对大众媒体的信任以及对感染冠状病毒的担忧。与美国不同,种族与接种疫苗的意愿无关。
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引用次数: 0
Assessing the Regulatory Challenges of Emerging Disruptive Technologies 评估新兴颠覆性技术的监管挑战
Pub Date : 2021-03-04 DOI: 10.1111/REGO.12392
Araz Taeihagh, M. Ramesh, Michael Howlett
The past decade has witnessed the emergence of many technologies that have the potential to fundamentally alter our economic, social, and indeed personal lives. The problems they pose are in many ways unprecedented, posing serious challenges for policymakers. How should governments respond to the challenges given that the technologies are still evolving with unclear trajectories? Are there general principles that can be developed to design governance arrangements for these technologies? These are questions confronting policymakers around the world and it is the objective of this special issue to offer insights into answering them both in general and with respect to specific emerging disruptive technologies. Our objectives are to help better understand the regulatory challenges posed by disruptive technologies and to develop generalizable propositions for governments' responses to them.
过去十年见证了许多技术的出现,这些技术有可能从根本上改变我们的经济、社会甚至个人生活。它们带来的问题在很多方面都是前所未有的,给政策制定者带来了严峻的挑战。鉴于这些技术仍在以不明确的轨迹发展,政府应如何应对这些挑战?是否存在可以开发的一般原则来设计这些技术的治理安排?这些都是世界各地的政策制定者面临的问题,本期特刊的目的是就一般问题和特定的新兴颠覆性技术提供答案。我们的目标是帮助更好地理解颠覆性技术带来的监管挑战,并为政府应对这些挑战提出可推广的建议。
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引用次数: 48
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