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On the Resource Allocation for Political Campaigns 论政治运动的资源配置
Pub Date : 2020-09-09 DOI: 10.2139/ssrn.3742905
Sebastián Morales, Charles Thraves
In an election campaign, candidates must decide how to optimally allocate their efforts/resources optimally among the regions of a country. As a result, the outcome of the election will depend on the players' strategies and the voters' preferences. In this work, we present a zero-sum game where two candidates decide how to invest a fixed resource in a set of regions, while considering their sizes and biases. We explore the Majority System (MS) as well as the Electoral College (EC) voting systems. We prove equilibrium existence and uniqueness under MS in a deterministic model; in addition, their closed form expressions are provided when fixing the subset of regions and relaxing the non-negative investing constraint. For the stochastic case, we use Monte Carlo simulations to compute the players' payoffs, together with its gradient and hessian. For the EC, given the lack of Equilibrium in pure strategies, we propose an iterative algorithm to find Equilibrium in mixed strategies in a subset of the simplex lattice. We illustrate numerical instances under both election systems, and contrast players' equilibrium strategies. Finally, we show that polarization induces candidates to focus on larger regions with negative biases under MS, whereas candidates concentrate on swing states under EC.
在竞选活动中,候选人必须决定如何在一个国家的各个地区之间最优地分配他们的努力/资源。因此,选举的结果将取决于参与者的策略和选民的偏好。在这项工作中,我们提出了一个零和游戏,两个候选人决定如何在一组地区投资固定资源,同时考虑他们的规模和偏见。我们探讨了多数决制(MS)和选举团(EC)投票制度。在确定性模型下,证明了均衡的存在唯一性;此外,在确定区域子集和放宽非负投资约束时,给出了它们的封闭形式表达式。对于随机情况,我们使用蒙特卡罗模拟来计算玩家的收益,以及它的梯度和黑森。对于EC,在纯策略缺乏均衡的情况下,我们提出了在单纯形格的一个子集中寻找混合策略均衡的迭代算法。我们举例说明了两种选举制度下的数值实例,并对比了参与者的均衡策略。最后,我们发现极化导致候选人在MS下关注更大的负面偏见区域,而在EC下候选人关注摇摆州。
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引用次数: 1
What's the Talk in Brussels? Leveraging Daily News Coverage to Measure Issue Attention in the European Union 布鲁塞尔的会谈是什么?利用每日新闻报道来衡量欧盟问题的关注度
Pub Date : 2019-05-24 DOI: 10.2139/ssrn.3393734
M. Ovádek, Nicolas Lampach, A. Dyevre
Research on issue attention in the European Union has focused on the prominence of EU integration in domestic politics and media and, at EU level, on the salience of individual issues and legislative files, often in relation to lobbying. Existing EU-level measures of issue saliency, though, are limited in scope and periodicity and tend to reflect the policy priorities of a single institutional actor rather than that of the broader EU bubble. We present an alternative measure of issue attention leveraging information from the Agence Europe daily bulletin which provides comprehensive but independent news coverage of EU affairs. We use text-mining techniques, including dynamic topic modelling, in combination with manual classification to map issue prevalence between 1979 and 2018. In addition to reporting validation results, we illustrate how our measure relates to other indicators of EU agenda formation and explain how researchers can make use of our new dataset.
对欧盟问题关注的研究主要集中在欧盟一体化在国内政治和媒体中的突出地位,以及在欧盟层面上,个别问题和立法文件的突出地位,通常与游说有关。然而,现有的欧盟层面的问题显著性衡量标准在范围和周期性上都是有限的,而且往往反映的是单一机构参与者的政策重点,而不是更广泛的欧盟泡沫。我们提出了另一种衡量问题注意力的方法,利用来自欧洲机构每日公报的信息,该公报提供全面但独立的欧盟事务新闻报道。我们使用文本挖掘技术,包括动态主题建模,结合人工分类来绘制1979年至2018年之间的问题流行情况。除了报告验证结果外,我们还说明了我们的测量与欧盟议程形成的其他指标之间的关系,并解释了研究人员如何利用我们的新数据集。
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引用次数: 1
Fake News in Social Networks 社交网络中的假新闻
Pub Date : 2017-08-21 DOI: 10.2139/ssrn.3023320
Christoph Aymanns, Jakob N. Foerster, Co-Pierre Georg
We model the spread of news as a social learning game on a network. Agents can either endorse or oppose a claim made in a piece of news, which itself may be either true or false. Agents base their decision on a private signal and their neighbors' past actions. Given these inputs, agents follow strategies derived via multi-agent deep reinforcement learning and receive utility from acting in accordance with the veracity of claims. Our framework yields strategies with agent utility close to a theoretical, Bayes optimal benchmark, while remaining flexible to model re-specification. Optimized strategies allow agents to correctly identify most false claims, when all agents receive unbiased private signals. However, an adversary's attempt to spread fake news by targeting a subset of agents with a biased private signal can be successful. Even more so when the adversary has information about agents' network position or private signal. When agents are aware of the presence of an adversary they re-optimize their strategies in the training stage and the adversary's attack is less effective. Hence, exposing agents to the possibility of fake news can be an effective way to curtail the spread of fake news in social networks. Our results also highlight that information about the users' private beliefs and their social network structure can be extremely valuable to adversaries and should be well protected.
我们将新闻传播建模为网络上的社交学习游戏。代理人可以支持或反对一则新闻中的说法,而新闻本身可能是真的,也可能是假的。代理根据私人信号和邻居过去的行为做出决定。给定这些输入,智能体遵循通过多智能体深度强化学习衍生的策略,并根据声明的真实性从行动中获得效用。我们的框架产生了代理效用接近理论的策略,贝叶斯最优基准,同时保持了模型重新规范的灵活性。当所有代理都接收到无偏私有信号时,优化策略允许代理正确识别大多数虚假声明。然而,对手通过针对具有偏见的私人信号的代理子集来传播假新闻的尝试可能会成功。当对手掌握了特工的网络位置或私人信号信息时更是如此。当智能体意识到对手的存在时,它们会在训练阶段重新优化自己的策略,对手的攻击效果会降低。因此,让代理商了解假新闻的可能性是遏制假新闻在社交网络中传播的有效方法。我们的研究结果还强调,关于用户的私人信仰和他们的社会网络结构的信息对对手来说非常有价值,应该得到很好的保护。
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引用次数: 17
Text-as-Data Analysis of Preferential Trade Agreements: Mapping the PTA Landscape 优惠贸易协定的文本即数据分析:绘制优惠贸易协定格局
Pub Date : 2017-07-10 DOI: 10.2139/SSRN.2999800
Wolfgang Alschner, Julia Seiermann, D. Skougarevskiy
Preferential trade agreements (PTAs) form an intricate web that connects countries across the globe. In this article, we introduce a PTA text corpus and research tools for its fine-grained, automated analysis. Recent computational advances allow for efficient and effective content analysis by treating text as data. We digitize PTA texts and use textual similarity tools to assess PTA design patterns on the global, national, and chapter level. Our descriptive analysis reveals, inter alia, that PTAs are more heterogeneous as a group than, for instance, bilateral investment agreements, but that they converge in regional or inter-regional clusters of similarly worded agreements. Following our descriptive account, we provide three concrete, interdisciplinary examples of how text-as-data analysis can advance the study of trade economics, politics, and law. In trade economics, similarity measures can provide more detailed representations of PTA design differences. These allow researchers to capture more meaningful variation when studying the economic impact of PTAs. In trade politics, scholars can use treaty similarity to trace design diffusion more accurately and test competing explanations for treaty design choices. Finally, in trade law, similarity measures offer new insights into the processes of normative convergence between legal regimes such as trade and investment law.
优惠贸易协定(pta)形成了一个错综复杂的网络,将全球各国联系在一起。在本文中,我们介绍了PTA文本语料库和用于其细粒度自动化分析的研究工具。最近的计算进步允许通过将文本视为数据进行高效和有效的内容分析。我们将PTA文本数字化,并使用文本相似性工具来评估全球、国家和章节层面的PTA设计模式。我们的描述性分析除其他外表明,自由贸易协定作为一个群体比双边投资协定更具有异质性,但它们在措辞相似的区域或区域间协定集群中趋于一致。在我们的描述之后,我们提供了三个具体的、跨学科的例子,说明文本即数据分析如何促进贸易、经济、政治和法律的研究。在贸易经济学中,相似性度量可以更详细地表示PTA设计差异。这使得研究人员在研究pta的经济影响时能够捕捉到更有意义的变化。在贸易政治中,学者可以使用条约相似性来更准确地追踪设计扩散,并测试条约设计选择的竞争解释。最后,在贸易法中,相似性度量为贸易和投资法等法律制度之间的规范性趋同过程提供了新的见解。
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引用次数: 20
Selected Research Methods 选择的研究方法
Pub Date : 2016-06-19 DOI: 10.2139/ssrn.2797783
P. Cottrell
The purpose of this section on research methods and designs is to analyze the contemporary literature in the field of quantitative finance. Fifteen selected research articles were compared and contrasted on how to analyze hedging and price methods for financial assets. In addition, an investigation and evaluation of recent trends with research designs for the use in quantitative finance to develop and establish hedging and pricing techniques will be conducted. The first article investigates modeling asymmetric volatility in the context of research methods explored by Hassan. The second research study involves oil future prices and term structures, whereby understanding the permanent and transitory shocks in oil futures can be accomplished via a structural vector auto-regression model by Zha. The third article of inquiry is by Cao and Guo which involved delta hedging performance methodologies. In the fourth research study, Ankirchner and Heyne suggested how to use research methods using cross hedging with stochastic correlations. In the fifth article, Srinvasan investigated stock market volatility and used different volatility models that are GARCH-types. The sixth peer-review study investigated is by Menkhoff, which involves currency momentum and the use of moving averages. The seventh research article was about how to price currency options and the methods used to determine which volatility model performed the best proposed was by Manzur, Hoque, and Poitras. The eighth scholarly study, which was authored by Jiang, involves foreign exchange markets and the use of a vector error correction model.The ninth intellectual inquiry investigated was on tail risk management and some of the methodologies used when modeling with Value-at-Risk and conditional Value-at-Risk by Kayan, Lee, and Pornrojnangkool. The tenth article explores the hydroelectric power industry and how to incorporate a hedging strategy and test for performance by Fleten, Brathen, and Nissen-Meyer. The eleventh research study investigated was by Frikha and Lemaire involved the gas and electricity spot price using a multi-factor model that can present higher volatility markets. The twelfth scholarly article proposed was by Hinnerich which explores equity swaps and demonstrates how to incorporate a jump diffusion model to capture price dynamics. The thirteenth study relates to derivative pricing using a close-form approximation relying on series expansions by Kristensen and Mele. The fourteenth study in this section involves how to build a trading algorithm system by Moldovan, Moca, and Nitchi. The last article reviewed was by Viebig and Poddig, whereby extreme value theory and copula theory was considered as a way to model multivariate daily return distributions of hedge funds.In the conclusion section of this Depth component a discussion on the synthesis of the relevant research related to research design used in quantitative finance was conducted. Comments on how to approach the resear
本研究方法和设计部分的目的是分析当代数量金融领域的文献。选取了15篇研究论文,对如何分析金融资产的套期保值和定价方法进行了比较和对比。此外,还将对定量金融中使用的研究设计的最新趋势进行调查和评估,以开发和建立对冲和定价技术。第一篇文章探讨了在Hassan探索的研究方法的背景下建模不对称波动。第二项研究涉及石油期货价格和期限结构,通过Zha的结构向量自回归模型来理解石油期货的永久性和暂时性冲击。第三篇调查文章是Cao和Guo的,涉及delta套期保值绩效方法。在第四项研究中,Ankirchner和Heyne建议如何使用随机相关交叉套期保值的研究方法。在第五篇文章中,Srinvasan研究了股票市场波动率,并使用了garch类型的不同波动率模型。Menkhoff调查的第六项同行评议研究涉及货币动量和移动平均线的使用。第七篇研究文章是关于如何为货币期权定价以及确定哪种波动率模型表现最佳的方法,由Manzur, Hoque, and Poitras提出。第八项学术研究由Jiang撰写,涉及外汇市场和矢量误差修正模型的使用。第九项智力调查是关于尾部风险管理,以及Kayan、Lee和Pornrojnangkool在使用风险价值和条件风险价值建模时使用的一些方法。第十篇文章探讨了水力发电行业,以及如何纳入对冲策略,并对Fleten, Brathen和Nissen-Meyer的业绩进行了测试。Frikha和Lemaire调查的第十一项研究涉及天然气和电力现货价格,使用多因素模型,可以呈现更高的波动性市场。Hinnerich提出的第十二篇学术文章探讨了股权互换,并展示了如何结合跳跃扩散模型来捕捉价格动态。第十三项研究涉及使用依赖于Kristensen和Mele的级数展开的近似形式的衍生品定价。本节的第十四项研究涉及Moldovan、Moca和Nitchi如何构建交易算法系统。回顾的最后一篇文章是Viebig和Poddig的,他们认为极值理论和copula理论是一种建模对冲基金多变量日收益分布的方法。在本深度部分的结论部分,对定量金融中使用的研究设计相关研究的综合进行了讨论。最后,对如何将研究设计的重点放在建立金融资产的套期保值和定价策略上进行了评论。本节的目的是探讨统计分析中开发的一些工具,这些工具使定量金融研究人员能够评估不同的对冲和定价策略。通过更好的研究设计和使用先进的统计方法,研究人员和从业人员可以更准确地评估他们的财务建模性能。在结论部分,上面提到的15篇研究文章中的每一篇都将在可以促进社会变革的研究方法框架中进行总结。除了对这些研究进行总结外,还探讨了一些问题,以提供可能的研究路径。
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引用次数: 0
The Quality of Citations: Towards Quantifying Qualitative Impact in Social Science Research 引文质量:走向量化社会科学研究的定性影响
Pub Date : 2016-06-01 DOI: 10.2139/ssrn.2874549
P. Bauer, Pablo Barberá, Simon Munzert
The quantity of citations (“times cited”) has evolved into an influential indicator of scientific impact both in itself and packaged into other metrics (e.g. h-index, impact factor). In this study we contrast the idea of “quantity” with the idea of the “quality” of citations, i.e. the “quality” of impact. We develop and present methods that can be used to move from a superficial assessment of citation quantity to a more nuanced view of the quality of citations. We illustrate these methods using six highly cited study in the fields of political science, economics and sociology. In the future this more nuanced view and the data we are generating should allow for testing various hypotheses linked to the reception of scientific works and the sociology of science more generally. Our study is complemented by opensource code (based on R) that shall be collected in a R package CitationsR that allows other researchers to pursue their own analyses of the quality of impact of one or several studies.
被引次数(“被引次数”)已发展成为科学影响的一个有影响力的指标,它本身和被打包成其他指标(如h指数、影响因子)。在这项研究中,我们将“数量”的概念与“质量”的概念进行了对比,即影响的“质量”。我们开发并提出了一些方法,可以用来从对引用数量的肤浅评估转向对引用质量的更细致入微的看法。我们用六个在政治学、经济学和社会学领域被高度引用的研究来说明这些方法。在未来,这种更细致的观点和我们正在生成的数据应该允许测试与科学作品的接受和更普遍的科学社会学有关的各种假设。我们的研究由开放源代码(基于R)补充,这些代码将收集在R包CitationsR中,允许其他研究人员对一项或几项研究的影响质量进行自己的分析。
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引用次数: 0
Agent-Based Simulation of State Collapse and Reconstruction: Analyzing the Past and Future of Somalia 基于主体的国家崩溃与重建模拟:分析索马里的过去与未来
Pub Date : 2016-05-05 DOI: 10.2139/ssrn.2775541
Takuto Sakamoto, M. Endo
Civil conflicts are frequently accompanied by significant political dynamics of state integration and disintegration. Despite substantial methodological advancement in the conflict literature, there have been few attempts at incorporating these dynamics into a formal analysis of conflict. In this article, we present an agent-based model of civil conflict that has a distinctive focus on state territorial integration and disintegration. Using various empirical data, we apply this model to the case of Somalia. The model is shown to capture several defining characteristics of the territorial rule in Somalia, most notably the strong tendency of the country to fragment. Extensive simulations also reveal the structural nature of the country’s resource constraints, which persistently hinder the nationwide establishment of stable rule. These results and their implications offer a fresh perspective for the literature on the conflicts in Somalia, which has often focused on a specific social cleavage and its political exploitation.
国内冲突常常伴随着国家一体化和解体的重大政治动态。尽管冲突文献在方法论上取得了长足的进步,但很少有人尝试将这些动态因素纳入对冲突的正式分析。在本文中,我们提出了一个基于主体的国内冲突模型,该模型特别关注国家领土的整合和解体。利用各种经验数据,我们将该模型应用于索马里的情况。该模型显示了索马里领土统治的几个决定性特征,最明显的是该国分裂的强烈趋势。广泛的模拟还揭示了该国资源约束的结构性,这一直阻碍着全国范围内建立稳定的统治。这些结果及其影响为有关索马里冲突的文献提供了一个新的视角,这些文献通常侧重于特定的社会分裂及其政治剥削。
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引用次数: 2
Characterizing Political Cynicism of First-Time Voters for the 2016 Philippine Elections 2016年菲律宾选举首次选民的政治愤世嫉俗特征
Pub Date : 2016-04-28 DOI: 10.2139/ssrn.2876985
J. V. Murcia, F. Guerrero
With elections looming in the Philippines, first-time voters are confronted with a serious dilemma: distrust and doubt with the government; hence, political cynicism. Hence, the purpose of the study is to characterize political cynicism as perceived by college students who are first-time voters of 2016 national and local elections. The study further examined the dimensionality of political cynicism as basis in developing a political cynicism index. Quantitative type of research via descriptive-exploratory method of research was utilized. A standardized instrument on political cynicism was distributed to 200 first-time voters in Padada who are currently enrolled in any higher education institution to determine the extent of political cynicism. Principal components factor analysis was used to derive the indices of political cynicism based on the survey results. Results revealed that overall political cynicism was found to be moderate. Moreover, political cynicism is multidimensional, which is a function of eight factors k1 to k8. It is recommended that academicians will further look into the applicability of the indices on a larger sample. The results could also yield basis for specific policy enhancements especially in shifting attitude towards politicians and Philippine politics as a whole.
随着菲律宾大选的临近,首次投票的选民面临着一个严重的两难境地:对政府的不信任和怀疑;因此出现了政治犬儒主义。因此,本研究的目的是表征2016年全国和地方选举首次选民的大学生所感知的政治犬儒主义。本研究进一步考察了政治犬儒主义的维度,并以此为基础编制了政治犬儒主义指数。定量研究采用描述性-探索性研究方法。一份关于政治犬儒主义的标准化工具分发给帕达达的200名首次选民,他们目前在任何高等教育机构注册,以确定政治犬儒主义的程度。根据调查结果,采用主成分因子分析法,得出政治犬儒主义的指数。结果显示,总体而言,政治犬儒主义是温和的。此外,政治犬儒主义是多维的,它是八个因素k1到k8的函数。建议院士们进一步研究这些指数在更大样本上的适用性。研究结果还可以为具体的政策改进提供依据,特别是在改变对政治家和整个菲律宾政治的态度方面。
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引用次数: 1
Modeling Political Belief and Its Propagation, with Malaysia as a Driving Context 政治信仰的建模及其传播,以马来西亚为驱动背景
Pub Date : 2014-02-28 DOI: 10.4236/OJPS.2014.42008
N. Zakaria
We discuss in this paper an agent-based social simulation model that describes the propagation of political belief in Malaysia. Worldview map is used as the representational scheme for political belief. Inter-agent interaction propagates the belief throughout the agent population, subject to similarity of emotion between the interacting agents and their distances apart, and various attributes of the individual agents. Media broadcast may be used by agents in their attempt to extend their reach. Computational experiments made using the model point to its plausibility. Further, it highlights, for the ruling coalition, the importance of both a strong political propaganda machinery and a strong governance in winning the hearts and minds of the electorate.
本文讨论了一个基于主体的社会模拟模型,该模型描述了马来西亚政治信仰的传播。世界观图被用作政治信仰的表征图式。智能体间的交互作用在整个智能体群体中传播信念,这取决于相互作用的智能体之间的情感相似性、它们之间的距离以及个体智能体的各种属性。代理人可以利用媒体广播来扩大他们的影响范围。利用该模型进行的计算实验表明了其合理性。此外,对于执政联盟来说,它强调了强大的政治宣传机制和强大的治理在赢得选民的心和思想方面的重要性。
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引用次数: 2
Dynamics of the Corruption Eradication in Indonesia 印尼根除腐败的动态
Pub Date : 2013-09-12 DOI: 10.2139/ssrn.2326176
Ardian Maulana, Hokky Situngkir
The paper discusses an important aspect of the complexity of corruption eradication in Indonesia. Corruption eradication is practically not merely about law enforcement, but also related to social, economic, and political aspects of the nation. By extracting the data from national news media and implement models describing the sentiment relations among political actors, the connection between balance of the sentiment among political elites and the critical levels of the investigation and law enforcement is apparently demonstrated. The focus group discussions among experts, practitioners, and social activists confirm the model.
本文讨论了印度尼西亚消除腐败复杂性的一个重要方面。根除腐败实际上不仅仅是执法问题,还涉及到国家的社会、经济和政治方面。通过从国家新闻媒体中提取数据并实施描述政治行为者情绪关系的模型,可以明显地证明政治精英的情绪平衡与调查和执法的关键水平之间的联系。专家、从业者和社会活动家之间的焦点小组讨论证实了这一模式。
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引用次数: 6
期刊
Political Methods: Computational eJournal
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