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Bitcoin, a lejárat nélküli követelés? (Bitcoin: Receivable Without Due Date?)
Pub Date : 2020-06-01 DOI: 10.2139/ssrn.3676977
Gabriella Erdős
Hungarian abstract: : A kriptovalutak nepszerűsege vilagszerte novekszik. Hasznaljak őket fizetesre, befektetesre, kincskepzesre, annak ellenere, hogy nem minősulnek fizetőeszkoznek, ertekpapirnak, vagy vagyontargynak, bar ketsegkivul minden kategorianak a tulajdonsagaibol rendelkeznek nehannyal. Egy magyar allasfoglalas szerint a krioptovalutakat egyeb kovetelesnek kell tekinteni, mig a nemzetkozi szamviteli sztenderdek ajanlasa szerint a kriptovalutakat vagy az immaterialis javak, vagy a keszletek kozott kell bemutatni. A cikk elemzi a kriptovalutak tulajdonsagait, es bemutatja, hogy milyen tarsasagi adozasi kovetkezmenyei vannak annak, ha a vallalkozas a magyar allasfoglalas ajanlasat koveti, es hogyan vezet a helytelen besorolas fals adozasi eredmenyekhez. A szerző az allasfoglalas visszavonasat, es uj szamviteli szabalyok es ertelmezes megalkotasat javasolja – akar egy uj eszkozkategoria megalkotasaval a kriptovalutak szamara. English abstract: Cryptocurrencies are gaining in popularity worldwide. They are used as if they were currencies, securities, debt or equity instruments, or property. They are neither of those things although they certainly show characteristics of each categories. A Hungarian non-binding ruling classifies them as claims or accounts receivable, while the international accounting standards recommend to present cryptocurrencies either as intangible assets or as inventories. The article analyses the characteristics of cryptocurrencies, and the corporate income tax consequences of following the recommendations of the Hungarian non-binding ruling. It shows why the wrong classification of cryptocurrencies leads to false tax results. The author recommends the withdrawal of the tax ruling and the establishment of new accounting rules and interpretations - possibly also the introduction of a new accounting category for cryptocurrencies.
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引用次数: 0
A Non-Linear Approach to Measure the Dependencies Between Bitcoin and Other Commodity Markets. 衡量比特币与其他商品市场之间依赖关系的非线性方法。
Pub Date : 2020-05-24 DOI: 10.1007/978-3-030-54252-8_12
Stéphane Goutte, Benjamin Keddad
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引用次数: 2
Is Board Capital a Double-Edged Sword? New Entry Threats and Firm Performance: On Examining the Moderating Role of Board Capital 董事会资本是一把双刃剑吗?新进入威胁与公司绩效:董事会资本的调节作用考察
Pub Date : 2020-05-21 DOI: 10.2139/ssrn.3606875
Yang Pan, Peng Huang, A. Gopal
A significant part of the fast-moving dynamics in the high-tech industries is due to the high rate of new entry in the form of entrepreneurial ventures. Leveraging a novel measure of new entry threats using text mining, we test the conjecture that threats from new entry lead to deterioration in operational performance. In addition, we hypothesize that the relationship is moderated by corporate board capital, a proxy of the board’s ability to leverage outside resources. We distinguish board capital breadth, measuring the diversity or heterogeneity of the board’s social ties, from board capital depth, or the embeddedness of the board in the focal firm’s industry. Our evidences show that a higher level of new entry threats indeed leads to an incumbent’s performance deterioration. Interestingly, we find that the moderating effect of board capital depends on its nature: particularly, board capital breadth mitigates the negative impact of new entry threats, while board capital depth strengthens the negative relationship between new entry threats and firm performance. We discuss the implications for research and practices.
高科技产业中快速发展的动力的一个重要部分是由于创业企业形式的新进入率很高。利用使用文本挖掘的新条目威胁的新度量,我们测试了新条目威胁导致操作性能恶化的猜想。此外,我们假设这种关系受到公司董事会资本的调节,董事会资本代表了董事会利用外部资源的能力。我们将董事会资本广度(衡量董事会社会关系的多样性或异质性)与董事会资本深度(或董事会在焦点公司所在行业的嵌入性)区分开来。我们的证据表明,较高水平的新进入者威胁确实会导致在职者的绩效恶化。有趣的是,我们发现董事会资本的调节作用取决于其性质:特别是董事会资本宽度减轻了新进入威胁的负面影响,而董事会资本深度加强了新进入威胁与公司绩效之间的负向关系。我们讨论了对研究和实践的影响。
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引用次数: 1
sDTM: A Supervised Bayesian Deep Topic Model for Text Analytics sDTM:用于文本分析的监督贝叶斯深度主题模型
Pub Date : 2020-05-20 DOI: 10.2139/ssrn.3612168
Yi Yang, Kunpeng Zhang, Yangyang Fan
This study proposes a novel supervised deep topic modeling approach for effective text analysis. This approach leverages the auxiliary data associated with text, such as ratings in consumer reviews or categories of posts in online forums, to enhance the discovery of latent topics in text. The proposed approach can effectively improve topic modeling performance in several ways. First, the learned latent topics are more meaningful and distinguishable, which helps text data exploration. Second, the latent topics discovered by the novel supervised deep topic model are more accurate, which improves the performance of downstream econometrics and predictive analytics that utilize latent topics as inputs. Given the prevalence of auxiliary data in real-world text analysis tasks and the wide adoption of topic modeling in business research and practice, the study offers an effective solution for extracting insights from text data.
本研究提出了一种新的监督深度主题建模方法,用于有效的文本分析。这种方法利用与文本相关的辅助数据,例如消费者评论中的评分或在线论坛中帖子的类别,来增强对文本中潜在主题的发现。该方法可以从多个方面有效地提高主题建模性能。首先,学习到的潜在主题更有意义和可区分,这有助于文本数据的探索。其次,新监督深度主题模型发现的潜在主题更加准确,从而提高了利用潜在主题作为输入的下游计量经济学和预测分析的性能。鉴于辅助数据在现实世界文本分析任务中的普遍存在以及主题建模在商业研究和实践中的广泛采用,本研究为从文本数据中提取见解提供了有效的解决方案。
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引用次数: 12
The Geography of Ridesharing: A Case Study of New York City 拼车的地理:以纽约市为例
Pub Date : 2020-05-18 DOI: 10.2139/ssrn.2997190
Chungsang Lam, Meng Liu, Xiang Hui
Despite the popularity of ridesharing, there is limited empirical evidence on how ridesharing activities differ across regions with different levels of accessibility and the implication for consumers. In this paper, we study the market for rides across New York City neighborhoods. We construct a novel data set that contains massive API queries on route-specific estimates of pricing, wait time, and travel time of Uber, Lyft, and the public transit. After linking this data with actual trip records of taxis, Uber, and Lyft, we document a strong pattern that ridesharing has a larger market share relative to taxis in neighborhoods with lower accessibility, defined either in terms of geographic distance to Midtown Manhattan or "economic distance" to job opportunities. Next, we estimate a discrete-choice model of demand for rides and interpret the geography of ridesharing through the lens of the model. We find that consumer surplus from ridesharing varies drastically across geography: passengers that are 5 to 15 miles (resp. more than 15 miles) from Midtown experience a 60% (resp. 19%) larger consumer surplus relative to passengers that are within 5 miles from Midtown. Additionally, over half of these gains comes from reduced wait time. We discuss the implications of the distributional results for policy makers.
尽管拼车很受欢迎,但关于可达性水平不同的地区之间拼车活动的差异及其对消费者的影响的实证证据有限。在本文中,我们研究了纽约市社区的乘车市场。我们构建了一个新的数据集,其中包含大量的API查询,这些查询是关于优步、Lyft和公共交通的定价、等待时间和旅行时间的特定路线估计的。在将这些数据与出租车、优步和Lyft的实际出行记录联系起来之后,我们发现了一个强大的模式,即在可达性较差的社区,拼车相对于出租车拥有更大的市场份额,可达性是根据到曼哈顿中城的地理距离或到工作机会的“经济距离”来定义的。接下来,我们估计了一个出行需求的离散选择模型,并通过该模型的镜头解释了拼车的地理位置。我们发现,拼车带来的消费者剩余在不同地区差异很大:5至15英里的乘客(平均每人)的出行距离为10英里。距离中城超过15英里(约16公里)的游客,可享受60%的旅游体验。19%)相对于离市中心5英里以内的乘客,消费者剩余要大一些。此外,超过一半的收益来自于减少的等待时间。我们讨论了分配结果对政策制定者的影响。
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引用次数: 7
Patient Demand Management through Prioritized Access with Time Windows Access Protocol 基于时间窗口访问协议的优先访问患者需求管理
Pub Date : 2020-05-15 DOI: 10.2139/ssrn.3602222
Derya Kilinc, E. Gel, M. Sir, K. Pasupathy
Problem definition: We consider appointment scheduling workflows for providing access to new patients seeking appointments at specialty group-practice departments and offer a novel demand management mechanism that enables the best use of care capacity through prioritization of requests. Relevance: Considering the increasing demand for healthcare, it is imperative that capacity-constrained specialty departments intentionally manage demand, particularly during the new patient intake process. Methodology: The novel Time Windows Access Protocol (TWAP) prioritizes appointment requests considering the corresponding patient population’s sensitivity to access delays. Under TWAP, scheduling agents are provided, for each patient priority class, a distinct contiguous portion of the booking horizon (i.e., time window) that they can use to search for an available appointment upon a request from Priority n. High priority classes are incentivized to book and attend appointments with low wait offers, while sufficient dilution of requests from lower priority classes are induced with higher (but still, medically safe) levels of wait. Results: We develop a closed-form, computationally efficient model to determine the optimal set of time windows to use for given delay-dependent appointment realization probabilities. We demonstrate the calculation and use of TWAP under strict prioritization and compromised prioritization objectives for a number of experimental settings and a real-life case study. Managerial Implications: TWAP allows direct control of access delays for different priority classes. Due to patients’ sensitivity to wait (characterizable through available data) this is equivalent to controlling fill rates of different priority classes, allowing us to manage patient demand and match it to care capacity. Under TWAP, slot utilization or overbooks are observed, and can be used as signals to self-correct. Other reservation-type prioritization mechanisms are generally effective, but they are hard to compute. They are also hard to implement since they attempt to control or protect capacity and observe access delays or fill rates.
问题定义:我们考虑预约安排工作流程,为在专业小组实践部门寻求预约的新患者提供访问,并提供一种新的需求管理机制,通过请求的优先级来实现护理能力的最佳利用。相关性:考虑到对医疗保健的需求不断增加,能力有限的专科部门必须有意识地管理需求,特别是在新患者接收过程中。方法:新颖的时间窗口访问协议(TWAP)优先考虑相应的患者群体对访问延迟的敏感性预约请求。在TWAP下,为每个患者优先级别提供了调度代理,为每个患者优先级别提供了一个明显的连续预约范围(即时间窗口),它们可以使用该预约范围搜索优先级n的可用预约。高优先级别的患者被激励预订和参加等待时间较低的预约,而较低优先级别的患者则被较高的等待时间(但仍然是医疗安全的)所诱导,以充分稀释请求。结果:我们开发了一个封闭形式,计算效率高的模型,以确定给定延迟相关的约会实现概率的最佳时间窗口集。我们演示了在严格的优先级和折衷的优先级目标下TWAP的计算和使用,用于许多实验设置和现实生活中的案例研究。管理含义:TWAP允许直接控制不同优先级类的访问延迟。由于患者对等待的敏感性(可通过可用数据表征),这相当于控制不同优先级的填充率,使我们能够管理患者需求并将其与护理能力相匹配。在TWAP下,可以观察到插槽利用率或超额使用,并将其用作自我纠正的信号。其他预留类型的优先级机制通常是有效的,但它们很难计算。它们也很难实现,因为它们试图控制或保护容量,并观察访问延迟或填充率。
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引用次数: 1
Various Methodologies for Micro-Video Recommendation System: A Survey 微视频推荐系统的各种方法综述
Pub Date : 2020-05-12 DOI: 10.2139/ssrn.3598885
J. Raj, Amirul Hoque, Dr Ashim Saha
Micro-Videos are playing a vital role in almost every field on the Internet like social-media, advertisement, education, entertainment, et cetera. It gives a way to brands and makers to achieve a large number of the individuals in only a moment. Users need to spend a lot of time in search of their desired ones and producer finds difficulty in getting the content liked by users. So, Micro-Video market needs a better and effective recommendation system. This paper provides a survey report on the various methodologies used for Micro-Video Recommendation System along with their advantages and drawbacks which will assist in the further advancement and the better implementation of the system.
微视频在互联网上几乎每个领域都扮演着至关重要的角色,比如社交媒体、广告、教育、娱乐等等。它为品牌和制造商提供了一种方法,可以在短时间内获得大量的个人。用户需要花费大量的时间去寻找他们想要的内容,而制作人很难获得用户喜欢的内容。因此,微视频市场需要一个更好、更有效的推荐系统。本文对微视频推荐系统中使用的各种方法及其优缺点进行了调查报告,有助于系统的进一步发展和更好的实施。
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引用次数: 1
Toward a 'Text as Data' Approach in the History and Methodology of Economics: An Application to Adam Smith’s Classics 走向经济学历史和方法论中的“文本即数据”方法:对亚当·斯密经典的应用
Pub Date : 2020-05-07 DOI: 10.2139/ssrn.3595120
Matthieu Ballandonne, I. Cersosimo
The fields of the history and methodology of economics have recently experienced a quantitative turn. Among the quantitative tools and methods recently used, text mining has received less attention. In this article, we apply a “text as data” approach to the study of Adam Smith’s The Wealth of Nations and The Theory of Moral Sentiments. We first study these two classics through the lenses of readability and lexical richness indicators and sentiment analysis. We then determine the most relevant words and topics in the two books and, as case studies, we examine the specific topics of opulence, poverty, prosperity, sympathy, tax, war, wealth, and woman. Our results confirm some of the well-known differences between the two books (thus supporting the argument that text mining is a powerful and generally reliable tool for exploratory research on unknown documents), but also provide new insights about them.
经济学的历史和方法论领域最近经历了一个量化的转变。在最近使用的定量工具和方法中,文本挖掘受到的关注较少。本文采用“文本即数据”的方法对亚当·斯密的《国富论》和《道德情操论》进行研究。我们首先从可读性、词汇丰富度指标和情感分析的角度来研究这两部经典。然后,我们确定两本书中最相关的词汇和主题,作为案例研究,我们研究了富裕、贫穷、繁荣、同情、税收、战争、财富和女性等具体主题。我们的结果证实了这两本书之间的一些众所周知的差异(因此支持文本挖掘是对未知文档进行探索性研究的强大且通常可靠的工具的论点),但也提供了关于它们的新见解。
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引用次数: 0
The Dehumanization and Demoralization of Management Control Systems: Can We Possibly Re-Humanize and Re- Moralize Them? 管理控制系统的非人性化和非道德化:我们能重新人性化和重新道德化吗?
Pub Date : 2020-05-01 DOI: 10.26595/eamr.2014.6.2.4
Josep M. Rosanas
In the last few decades, there has been some concern about forms becoming less and less “human”. Or, in other words, becoming a place where human beings cannot self- actualize, where they are only pieces of a puzzle or “adjuncts to machines”. This paper intends to review briefly the previous situation in the two decades after WW II, and then show how dehumanization of the firm and of the economic context of the firms begun after the crisis of the 70’s.

Next, the paper goes to Management Control Systems, revising the “classical” systems and analyzing the Balanced Scorecard, which has been possible the main tool used for management control in the last forty years, showing how it is in fact unbalanced and dehumanizing. After illustrating this through a case example, it is concluded that indicators used for diagnostic for self-control only, with no implication in hierarchical control and/or incentives, may be very useful tools for management.
在过去的几十年里,人们一直担心形式会变得越来越不像“人”。或者,换句话说,成为一个人类无法自我实现的地方,在那里他们只是拼图的碎片或“机器的附属物”。本文旨在简要回顾二战后二十年的情况,然后展示企业的非人性化和企业的经济背景是如何在70年代危机后开始的。接下来,本文进入管理控制系统,对“经典”系统进行了修订,并分析了平衡计分卡,这可能是过去四十年来管理控制的主要工具,显示了它实际上是如何不平衡和非人性化的。在通过一个案例说明了这一点之后,得出的结论是,仅用于自我控制诊断的指标,与等级控制和/或激励无关,可能是非常有用的管理工具。
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引用次数: 1
Predicting Human Discretion to Adjust Algorithmic Prescription: A Large-Scale Field Experiment in Warehouse Operations 预测人类自由裁量权以调整算法处方:仓库操作中的大规模现场实验
Pub Date : 2020-04-26 DOI: 10.2139/ssrn.3355114
Jiankun Sun, Dennis J. Zhang, Haoyuan Hu, J. V. Mieghem
Conventional optimization algorithms that prescribe order packing instructions (which items to pack in which sequence in which box) focus on box volume utilization yet tend to overlook human behavioral deviations. We observe that packing workers at the warehouses of the Alibaba Group deviate from algorithmic prescriptions for 5.8% of packages, and these deviations increase packing time and reduce operational efficiency. We posit two mechanisms and demonstrate that they result in two types of deviations: (1) information deviations stem from workers having more information and in turn better solutions than the algorithm; and (2) complexity deviations result from workers’ aversion, inability, or discretion to precisely implement algorithmic prescriptions. We propose a new “human-centric bin packing algorithm” that anticipates and incorporates human deviations to reduce deviations and improve performance. It predicts when workers are more likely to switch to larger boxes using machine learning techniques and then proactively adjusts the algorithmic prescriptions of those “targeted packages.” We conducted a large-scale randomized field experiment with the Alibaba Group. Orders were randomly assigned to either the new algorithm (treatment group) or Alibaba’s original algorithm (control group). Our field experiment results show that our new algorithm lowers the rate of switching to larger boxes from 29.5% to 23.8% for targeted packages and reduces the average packing time of targeted packages by 4.5%. This idea of incorporating human deviations to improve optimization algorithms could also be generalized to other processes in logistics and operations. This paper was accepted by Charles Corbett, operations management.
传统的优化算法规定了顺序包装指令(哪些物品按照哪个顺序在哪个箱子里包装),重点是箱子的体积利用率,但往往忽略了人类行为的偏差。我们观察到,阿里巴巴集团仓库的包装工人有5.8%的包裹偏离了算法处方,这些偏差增加了包装时间,降低了操作效率。我们假设了两种机制,并证明它们导致了两种类型的偏差:(1)信息偏差源于工人拥有更多的信息,反过来又比算法更好的解决方案;(2)复杂性偏差是由工人厌恶、无法或自由裁量权精确执行算法处方造成的。我们提出了一种新的“以人为中心的装箱算法”,该算法可以预测并结合人类的偏差,以减少偏差并提高性能。它利用机器学习技术预测员工何时更有可能转向更大的盒子,然后主动调整这些“目标包裹”的算法处方。我们与阿里巴巴集团进行了一次大规模的随机实地实验。订单被随机分配到新算法(治疗组)或阿里巴巴的原始算法(对照组)。现场实验结果表明,新算法将目标包装的换箱率从29.5%降低到23.8%,将目标包装的平均包装时间减少4.5%。这种结合人为偏差来改进优化算法的想法也可以推广到物流和运营的其他过程中。这篇论文被运营管理的Charles Corbett接受。
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引用次数: 43
期刊
Information Systems & Economics eJournal
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