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Anatomy of a Techno-Creative Community – The Role of Places and Events in the Emergence of Videomapping in Nantes 剖析一个技术创意社区——南特视频制图出现中的地点和事件的作用
Pub Date : 2020-05-01 DOI: 10.2139/ssrn.3636403
Etienne Capron, Dominique Sagot-Duvouroux, R. Suire
This article aims to study the role of places and events in the structuring of a community of innovation whose practice is at the crossroads of art and tech - videomapping. Based on an exploratory case study, we observe the relationships between the different actors who form subgroups, sharing a common interest in a techno-creative practice - but whose collective innovation dynamic is only in its beginnings. We also document the usage of places and events in their intermediation role for these subgroups. This reveals preferential circulations - patterns of moves among a set of focal locations in the city for a community – and the crucial role of these locations in creative communities emergence.
本文旨在研究地点和事件在构建创新社区中的作用,其实践处于艺术和技术的十字路口-视频地图。基于一个探索性的案例研究,我们观察了组成子群体的不同参与者之间的关系,这些人对技术创新实践有着共同的兴趣,但他们的集体创新动力才刚刚开始。我们还记录了地点和事件在这些子组的中介角色中的使用情况。这揭示了优先循环——在城市的一组焦点地点之间为社区移动的模式——以及这些地点在创意社区出现中的关键作用。
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引用次数: 0
Dissecting Time-Varying Risk Exposures in Cryptocurrency Markets 剖析加密货币市场中的时变风险敞口
Pub Date : 2020-05-01 DOI: 10.2139/ssrn.3609949
Daniele Bianchi, Massimo Guidolin, Manuela Pedio
In this paper we take an empirical asset pricing perspective and investigate the dominant view (possibly, an instinctive reflection of the media hype surrounding the surge of Bitcoin valuations) that cryptocurrencies represent a new asset class, spanning risks and payoffs sufficiently different from the traditional ones. Methodologically, we rely on a flexible dynamic econometric model that allows not only time-varying coefficients, but also allow that the entire forecasting model be changing over time. We estimate such model by looking at the time variation in the exposures of major cryptocurrencies to stock market risk factors (namely, the six Fama French factors), to precious metal commodity returns, and to cryptocurrency-specific risk-factors (namely, crypto-momentum, a sentiment index based on Google searches, and supply factors, i.e., electricity and computer power). The main empirical results suggest that cryptocurrencies are not systematically exposed to stock market factors, precious metal commodities or supply factors with the exception of some occasional spikes of the coecients during our sample. On the contrary, crypto assets are characterized by a time-varying but significant exposure to a sentiment index and to crypto-momentum. Despite the lack of predictability compared to traditional asset classes, cryptocurrencies display considerable diversification power in a portfolio perspective and as such they can lead to a moderate improvement in the realized Sharpe ratios and certainty equivalent returns within the context of a typical portfolio problem.
在本文中,我们采取了经验资产定价的角度,并调查了主流观点(可能是对围绕比特币估值激增的媒体炒作的本能反映),即加密货币代表了一种新的资产类别,其风险和收益与传统资产完全不同。在方法上,我们依赖于一个灵活的动态计量经济模型,它不仅允许系数随时间变化,而且允许整个预测模型随时间变化。我们通过观察主要加密货币对股票市场风险因素(即六个Fama French因素),贵金属商品回报以及加密货币特定风险因素(即加密动量,基于谷歌搜索的情绪指数和供应因素,即电力和计算机功率)的敞口的时间变化来估计这种模型。主要的实证结果表明,除了我们样本中偶尔出现的一些系数峰值外,加密货币没有系统地暴露于股票市场因素、贵金属商品或供应因素。相反,加密资产的特点是时变的,但对情绪指数和加密势头的影响很大。尽管与传统资产类别相比缺乏可预测性,但从投资组合的角度来看,加密货币显示出相当大的多样化能力,因此,在典型的投资组合问题背景下,它们可以导致实现夏普比率和确定性等效回报的适度改善。
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引用次数: 7
Sources of Comparative Advantage in Data-Related Services 数据相关服务业比较优势的来源
Pub Date : 2020-05-01 DOI: 10.2139/ssrn.3657216
Erik Marel
Does digital infrastructure increase trade benefits in services, and how large are these trade benefits? This paper uses the prevalence of countries’ data centres and secure internet servers to investigate the impact of data-related infrastructures on services trade. Data centres and internet servers facilitate the production and trade of many service sectors reliant on software technologies. Therefore, digital infrastructures are complementary sources of comparative advantage in the more data-reliant sectors. Instrumental variable regressions underline this trade impact by using as instruments a country’s exposure to natural hazards since 1900, such as earthquakes, floods and droughts. Overall, data infrastructures are an important and exogenous determinants of specialization patterns in services dependent on software.
数字基础设施是否增加了服务贸易利益,这些贸易利益有多大?本文利用各国数据中心和安全互联网服务器的普及程度来调查数据相关基础设施对服务贸易的影响。数据中心和互联网服务器促进了许多依赖软件技术的服务部门的生产和贸易。因此,在更依赖数据的行业中,数字基础设施是比较优势的互补来源。工具变量回归通过使用一个国家自1900年以来遭受的自然灾害(如地震、洪水和干旱)作为工具来强调这种贸易影响。总的来说,数据基础设施是依赖于软件的服务的专门化模式的一个重要的外生决定因素。
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引用次数: 2
Unemployment Research in the Conditions of the Labour Market Transformation 劳动力市场转型条件下的失业问题研究
Pub Date : 2020-04-30 DOI: 10.15587/2706-5448.2020.202439
T. Romanika
The object of research is the labor market, which is undergoing significant transformations under the influence of technological and structural changes, global and demographic trends. In this context, special attention should be paid to such an important aspect as youth unemployment, to identify its features. The subject of analysis is the classification of the causes of unemployment and the development of unemployment, youth behavior patterns on the labor market, manifested in the spread of phenomena such as distance employment, the latest forms of employment, self-employment, social exclusion of youth and the like. The methodology of an interdisciplinary approach to the analysis of youth unemployment made it possible to identify and characterize not only its state and structure, but also to identify the characteristics of youth behavior patterns in the labor market. The conclusion regarding the growth and actualization of employment instability, the decrease in the value of labor among youth, the blurring of the boundaries between employment and unemployment, as a result of modern transformations of the labor market, actualizes the need to search for a new youth policy. Analyzing the factors producing the growth of youth unemployment and the spread of non-standard forms of employment, it should be noted the need for their constant consideration in the institutional environment of the modern economy. The main manifestations of socio-economic transformations of the labor market are substantiated. It is proved that the effective inclusion of young people in social production is in the plane of the formation of an innovative model of social and labor relations based on the reform and creation of regulatory institutions. Without the development and implementation of effective and interconnected institutional mechanisms for managing the youth labor market, it is impossible to systematically and comprehensively increase the level of youth employment. The paper proposes the creation of a system of institutions, the main activity of which will be aimed at stimulating youth employment, identifying hidden employment and youth unemployment, employment, retraining, work with gifted youth, social guarantees and the like. Thanks to this, it is possible to tightly control the state of youth unemployment, to respond quickly and to implement prompt and effective measures to overcome it
研究对象是劳动力市场,在技术和结构变化、全球和人口趋势的影响下,劳动力市场正在发生重大变化。在这方面,应特别注意青年失业这一重要方面,以确定其特点。分析的主题是失业原因的分类和失业的发展,青年在劳动力市场上的行为模式,表现在远程就业、最新就业形式、自营职业、社会排斥青年等现象的蔓延。对青年失业问题进行跨学科分析的方法不仅可以确定其状态和结构,而且可以确定劳动力市场中青年行为模式的特征。关于就业不稳定的增长和实现,青年劳动力价值的下降,就业和失业之间界限的模糊,作为现代劳动力市场转型的结果,实现了寻求新的青年政策的必要性。在分析造成青年失业增长和非标准就业形式蔓延的因素时,应该注意到在现代经济的制度环境中需要不断考虑这些因素。劳动力市场社会经济转型的主要表现形式得到了证实。事实证明,有效地将青年纳入社会生产是在改革和创造监管制度的基础上形成一种创新的社会和劳动关系模式的层面上。没有建立和实施有效的、相互联系的青年劳动力市场管理体制机制,就不可能系统地、全面地提高青年就业水平。本文建议建立一个制度体系,其主要活动将旨在促进青年就业,识别隐性就业和青年失业,就业,再培训,与天才青年合作,社会保障等。正是由于这一点,才有可能严格控制青年失业状况,迅速作出反应,并采取及时有效的措施来克服它
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引用次数: 0
Nexus between Government Effectiveness and Living Condition in Sub-Saharan Africa 撒哈拉以南非洲政府效能与生活条件的关系
Pub Date : 2020-04-29 DOI: 10.2139/ssrn.3586339
M. A. Workneh, Z. S. Eshete
A two wave panel data from Afro-barometer database is used to examine the nexus between government effectiveness and living condition in Sub-Saharan Africa. Exploratory factor analysis with polychoric correlation and ordered probit estimation technique for panel data are used in the inferential analysis. The vulnerability of the dependent variable (self-assessed living condition) for heterogeneity problem is shown using Random effects generalized ordered probit model with auto fit procedure. This study found that government futility in provision of basic needs and basic security, and in handling of critical economic issues, in which individuals are facing in their day to day life, deteriorates the living condition of individuals in Sub-Saharan Africa. This result, convincingly, demonstrates the ineptitude of those governments in Sub-Saharan Africa, which are mostly characterized by being bureaucratic, undemocratic, unaccountable, full of violence and debauched, and hence makes the life of their citizens unsafe and meagre. The result also shows that being literate the individuals are, the higher the probability of living in good condition compared to those who are illiterate. Hence, those governments should focus on their policies and implementation, which helps to enhance the living condition of individuals through provision of basic needs and basic security, and better treatment of economic issues including unemployment, access to basic services, infrastructure, and income inequality.
利用非洲晴雨表数据库的两波面板数据,研究了撒哈拉以南非洲地区政府效率与生活条件之间的关系。在推理分析中,采用了探索性因子分析和多元相关分析,并对面板数据进行了有序概率估计。采用随机效应广义有序probit模型和自动拟合方法,分析了因变量(自评生活条件)对异质性问题的脆弱性。这项研究发现,政府在提供基本需求和基本安全方面的无能,以及在处理个人日常生活中面临的关键经济问题方面的无能,恶化了撒哈拉以南非洲地区个人的生活状况。这一结果令人信服地证明了撒哈拉以南非洲各国政府的无能,这些政府的主要特点是官僚主义、不民主、不负责任、充满暴力和放荡,因此使其公民的生活不安全和贫乏。研究结果还表明,与不识字的人相比,识字的人生活状况良好的可能性越大。因此,这些政府应该把重点放在他们的政策和实施上,这有助于通过提供基本需求和基本安全来改善个人的生活条件,并更好地处理经济问题,包括失业、获得基本服务、基础设施和收入不平等。
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引用次数: 0
Subcontracting Network Formation Among US Airline Carriers 美国航空公司分包网络的形成
Pub Date : 2020-04-11 DOI: 10.2139/ssrn.3308105
Lei He, Georgia Kosmopoulou
In this paper, we use Bayesian estimation to study subcontracting network formation and pricing decisions in the US airline industry. We find that, a major carrier is more likely to enter a route in subcontracting services if its rivals have already subcontracted while regional carriers prefer to avoid competition. For existing major carriers per-route, self-service and use of subsidiaries are complementary to subcontracting, while code-sharing is a substitute. Carrier similarity and previously formed networks have significant impacts on new network formations. Taking potential endogeneity issues into account, we find that major carriers’ subcontracting behaviors decrease ticket prices by 3.4%.
本文运用贝叶斯估计方法研究了美国航空业分包网络的形成与定价决策。我们发现,如果竞争对手已经进行了分包,大型航空公司更有可能进入分包服务航线,而区域航空公司则倾向于避免竞争。对于现有的单航线主要运营商,自助服务和使用子公司是分包的补充,代码共享是替代。载波相似性和先前形成的网络对新网络的形成有显著影响。考虑到潜在的内生性问题,我们发现主要航空公司的分包行为使机票价格下降了3.4%。
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引用次数: 2
WHEN BLOCKCHAIN MEETS FASHION DESIGN: CAN SMART CONTRACTS CURE INTELLECTUAL PROPERTY PROTECTION DEFICIENCY? 当区块链遇上时尚设计:智能合约能解决知识产权保护不足吗?
Pub Date : 2020-04-08 DOI: 10.2139/ssrn.3488071
S. Yanisky-Ravid, G. Monroy
As one of the most creative fields that employs technology, fashion design surprisingly lacks effective intellectual property protection. This article posits that the blockchain platform and smart contract applications can remedy the failure of intellectual property laws to protect designs and dramatically improve the industry. Therefore, the industry as a whole, including luxury brands but also smaller and medium-sized brands and young designers, should adopt these technologies as the solution to their current challenges. This article explains how blockchain technology can be used to create a crypto-legal structure of endogenous protective laws administered through a decentralized system of self-executing smart contracts that can fill the gap in the existing intellectual property regime. The article further addresses how the adoption of such technology improves the control over designs, the distribution chains, fee collection, international transactions and the fight against infringement, while effectively creating a more efficient and transparent industry. These conclusions are based on theoretical justification focusing on the theory of law and economics. Finally, the article urges first movers within the fashion industry to adopt blockchain technology and discusses the hurdles that arise with implementing such a system and ends with an assessment of the impact of blockchain-based smart contract on the players in the industry.
服装设计作为最具创造性的科技领域之一,却缺乏有效的知识产权保护。本文认为,区块链平台和智能合约应用可以弥补知识产权法在保护设计方面的失败,并极大地改善行业。因此,整个行业,包括奢侈品牌,也包括中小型品牌和年轻设计师,都应该采用这些技术来解决他们目前面临的挑战。本文解释了如何使用区块链技术来创建一种内生保护法的加密法律结构,通过一个分散的自动执行智能合约系统来管理,从而填补现有知识产权制度的空白。本文进一步阐述了采用这种技术如何改善对设计、分销链、收费、国际交易和打击侵权的控制,同时有效地创造一个更高效、更透明的行业。这些结论是以法学和经济学理论为核心的理论论证为基础的。最后,文章敦促时尚行业的先行者采用区块链技术,并讨论了实施这种系统时出现的障碍,最后评估了基于区块链的智能合约对行业参与者的影响。
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引用次数: 0
Political Networks Across the Globe 全球政治网络
Pub Date : 2020-04-06 DOI: 10.2139/ssrn.3568308
S. Commander, S. Poupakis
Political networks are an important feature of the political and economic landscape of countries. Despite their ubiquity and significance, information on such networks has proven hard to collect due to a pervasive lack of transparency. However, with the advent of big data and artificial intelligence, major financial services institutions are now actively collating publicly available information on politically exposed persons and their networks. In this study, we use one such data set to show how network characteristics vary across political systems. We provide results from more than 150 countries and show how the format of the network tends to reflect the extent of democratisation of each country. We also outline further avenues for research using such data.
政治网络是各国政治和经济格局的一个重要特征。尽管这些网络无处不在,意义重大,但由于普遍缺乏透明度,事实证明很难收集到这些网络上的信息。然而,随着大数据和人工智能的出现,各大金融服务机构现在正积极整理有关政治人物及其网络的公开信息。在这项研究中,我们使用一个这样的数据集来显示网络特征如何在不同的政治制度中变化。我们提供了来自150多个国家的结果,并展示了网络的形式如何倾向于反映每个国家的民主化程度。我们还概述了利用这些数据进行研究的进一步途径。
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引用次数: 1
Which Factors Determine the Adoption of the Internet of Things? Impacts and Benefits 哪些因素决定了物联网的采用?影响及效益
Pub Date : 2020-04-06 DOI: 10.2139/ssrn.3569595
M. Sarbu
The Internet of Things becomes increasingly important for the production process of firms. Yet, little is known about the factors that determine the adoption of the Internet of Things among firms and its impact on firm performance. This paper provides first econometric evidence on the determinants of the Internet of Things among firms and on potential performance impacts. The analysis is based on firm-level data from 874 German firms and a probit model as well as an instrumental variable regression as econometric approach. The results reveal that collaboration platforms, B2B e-commerce, the use of computers, a large firm size and the use of ERP software increase the propensity to use the Internet of Things. In contrast, few competitors are negatively related to the Internet of Things. The results suggest that the causality runs from the determinants to the adoption of the Internet of Things. The results further indicate that sales and product innovation are highest for firms jointly using the Internet of Things and collaboration platforms while a reduction of the workforce is also highest in this case.
物联网在企业的生产过程中变得越来越重要。然而,关于决定企业采用物联网及其对企业绩效的影响的因素知之甚少。本文首次提供了物联网在企业之间的决定因素和潜在绩效影响的计量经济学证据。该分析基于874家德国企业的企业层面数据,并采用probit模型和工具变量回归作为计量经济学方法。结果表明,协作平台、B2B电子商务、计算机的使用、大公司规模和ERP软件的使用增加了使用物联网的倾向。相比之下,很少有竞争对手与物联网负相关。结果表明,因果关系从决定因素到物联网的采用。结果进一步表明,在联合使用物联网和协作平台的企业中,销售额和产品创新最高,而在这种情况下,劳动力减少也最高。
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引用次数: 1
Analysis of Bitcoin Returns Volatility using AR-GARCH Modelling 基于AR-GARCH模型的比特币收益波动性分析
Pub Date : 2020-04-01 DOI: 10.2139/ssrn.3567216
M. Dash
The study examines the stability of Bitcoin price/returns volatility using an AR-GARCH model. The data for the study were the daily closing Bitcoin prices obtained from the bitcoin,com website for the study period 01/01/2013 - 31/12/2017.
该研究使用AR-GARCH模型检验了比特币价格/回报波动性的稳定性。该研究的数据是从bitcoin.com网站获得的2013年1月1日至2017年12月31日研究期间的每日收盘价。
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引用次数: 0
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Economics of Networks eJournal
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