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Composition Effects in Platforms with Population Heterogeneity 种群异质性平台的构成效应
Pub Date : 2019-11-05 DOI: 10.2139/ssrn.3461023
Michael Sacks
I develop a duopoly model of competition between platforms, incorporating users with heterogeneous preferences over both the platforms' characteristics and the presence of other users. Hence platforms are concerned with both the number and composition of users. The model yields novel representations of heterogeneity, size effects, and composition effects. I use these representations to decompose the relationship between the price and the size and composition of a platform. Prices need not be monotonic in the size of the installed base and profitability can similarly vary inversely. I identify conditions under which prices are increasing, decreasing, or unchanging in platform size. Given that users care about composition, nonpricing strategies to cultivate platform composition emerge when platforms cannot sufficiently leverage price discrimination. Composition effects and cultivation reframe the dominant-firm fringe-firm paradigm and explain the presence of multiproduct firms in platform markets, such as online dating.
我开发了一个平台之间竞争的双寡头模型,将对平台特征和其他用户的存在具有异质偏好的用户纳入其中。因此,平台关心的是用户的数量和构成。该模型产生了异质性、尺寸效应和组成效应的新表示。我使用这些表示来分解价格与平台的大小和组成之间的关系。在安装基础的大小上,价格不一定是单调的,盈利能力也可能同样相反地变化。我确定了在哪些条件下,价格在平台规模上增加、减少或保持不变。考虑到用户关心构成,当平台不能充分利用价格歧视时,培育平台构成的非定价策略就出现了。构成效应和培育重塑了主导企业边缘企业范式,并解释了多产品企业在平台市场(如在线约会)中的存在。
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引用次数: 0
New in the Professional Mobility of Kazakhstan Scientists as an Element of Scientific Activity and a Way to Survive 哈萨克斯坦科学家的职业流动性作为科学活动的一个要素和一种生存方式的新现象
Pub Date : 2019-11-05 DOI: 10.2139/ssrn.3481109
L. Spankulova
Intellectual mobility is seen as a specific form of professional mobility, reflecting the unity of scientific knowledge development and changes in social conditions. External and internal professional mobility of scientific personnel (geography, duration of stay abroad, mechanisms and purposes of departure) between organizations, sectors, regions and countries is an adequate means of transfer of knowledge and technology, ahead of the development of scientific and production cooperation. In this case, by academic mobility of scientific personnel we mean a change of place of work for scientists without changing their scientific sphere of activity, their temporary transfer for the purpose of participation in research projects and networks. Professional development and retraining is an integral form of existence of scientists, reflecting their internal development needs (including the desire to solve their financial problems). The social experience gained has always had a strong impact on the further development of their professional and research careers. Professional mobility causes quantitative and qualitative changes - there is a transformation of science, a measure of the saturation of human resources in a particular scientific direction.
智力流动被看作是职业流动的一种具体形式,反映了科学知识发展与社会条件变化的统一性。科学人员在组织、部门、区域和国家之间的外部和内部专业流动(地理位置、在国外停留的时间、机制和离开的目的)是在发展科学和生产合作之前转让知识和技术的适当手段。在这种情况下,通过科学人员的学术流动,我们指的是科学家在不改变其科学活动领域的情况下改变工作地点,他们的临时转移是为了参与研究项目和网络。专业发展和再培训是科学家存在的一个整体形式,反映了他们的内部发展需求(包括解决他们的经济问题的愿望)。获得的社会经验总是对他们的专业和研究事业的进一步发展产生强烈的影响。专业人员的流动引起了量变和质变——科学发生了转变,这是衡量某一特定科学方向的人力资源饱和度的一种方法。
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引用次数: 0
Main Principles and Foreign Approaches to the Study of the Relationship between Diffusion of Innovation and Economic Growth 创新扩散与经济增长关系研究的主要原则与国外方法
Pub Date : 2019-11-05 DOI: 10.2139/ssrn.3481096
L. Spankulova
The modern economic theory gives diffusion of innovation and full-scale innovation activity a special stimulating role as one of the additional sources of economic growth in the region. In her monograph "Diffusion of European innovations in Russia" E.V. Alekseeva writes "...The transfer and diffusion of the most important innovations from one country to another is a working paradigm of the theory of modernization..." [Alexeyeva, 2007]. Within the framework of this work, diffusion of innovations is defined as the import and distribution of innovations in the society with direct contact of participants of interaction between the spheres of science, education and innovations. Or indirectly through various means of information transfer". The essence of the diffusion of innovation lies in the diffusion of the innovative product into the consumption environment due to the unsaturated nature of the product, as is the case, for example, with the spread of molecules of one gas into a volume with a lower concentration, up to the equalization of concentrations. Previously, the problems were considered by other authors for the case of quantitative assessment of the impact of costs on R&D and technological innovation, their flows in space on the economic growth of the regions of Russia, the leading countries of the European Union. In addition to the classical objectives of economic growth, many scientists have recently focused their attention on empirical modelling of regional growth based on innovation. The theory of diffusion of innovation and knowledge flows is important in itself as a section of the general theory of the relationship between economic growth and innovation activity and as a section of modern economic theory with numerous applications in mechanics, physics, biology, geography and other natural science disciplines. The theory of diffusion of innovations and knowledge flows aims to explain the speed and breadth of various product and process innovations in society. The urgent task of the transition from a resource-based economy to industrial development is to increase innovation activity. The active and special decisive role in this can be played by the flow of knowledge between the regions - as the general economic conditions of economic growth in Kazakhstan.
现代经济理论认为,创新扩散和全面创新活动作为区域经济增长的附加来源之一,具有特殊的刺激作用。E.V.阿列克谢耶娃在她的专著《欧洲创新在俄罗斯的传播》中写道:“……最重要的创新从一个国家向另一个国家的转移和扩散是现代化理论的一个工作范式……”艾勒锡耶娃(道,2007]。在这项工作的框架内,创新的扩散被定义为创新在社会中的输入和分配,与科学、教育和创新领域之间互动的参与者直接接触。或通过各种手段间接传递信息”。创新扩散的本质在于创新产品由于产品的不饱和特性而扩散到消费环境中,如一种气体分子扩散到浓度较低的体积中,直至浓度均衡。以前,其他作者在定量评估成本对研发和技术创新的影响的案例中考虑了这些问题,它们在空间上的流动对欧洲联盟主要国家俄罗斯各地区的经济增长的影响。除了传统的经济增长目标之外,许多科学家最近将注意力集中在基于创新的区域增长的实证建模上。创新和知识流动的扩散理论作为经济增长和创新活动之间关系的一般理论的一部分,作为现代经济理论的一部分,在力学、物理学、生物学、地理学和其他自然科学学科中有着广泛的应用,其本身就很重要。创新和知识流动的扩散理论旨在解释社会中各种产品和工艺创新的速度和广度。从资源型经济向工业型经济转型的紧迫任务是增加创新活动。各区域之间的知识流动可以在这方面发挥积极和特殊的决定性作用- -作为哈萨克斯坦经济增长的一般经济条件。
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引用次数: 0
Using Panel VAR to Analyze International Knowledge Spillovers 运用面板VAR分析国际知识溢出
Pub Date : 2019-11-01 DOI: 10.1111/roie.12438
N. Hovhannisyan, Norman H. Sedgley
Technology diffusion often plays a critical role in models of trade and economic growth. Most existing empirical tests for international technology spillovers suggest some role for spillovers in explaining productivity growth. It has been relatively difficult, however, to identify separate roles for the direct and indirect channels of knowledge spillovers. The influence of these channels is often confounded owing to the focus on total‐factor productivity (TFP) and R&D spending within a cross‐section or panel data setting. This paper employs an alternative methodology to investigate the role of direct knowledge spillovers. Using citation‐weighted domestic patents, citation‐weighted foreign patents and value added for 14 U.S. manufacturing industries over the period 1977 to 2004 a panel VAR methodology is employed to investigate the dynamic role of direct and indirect knowledge spillovers. Evidence for the role of the direct knowledge spillovers channel is found—an increase in citation‐weighted patents abroad directly increases the measure of domestic citation‐weighted patents, after accounting for the influence of productivity/value added. The role of foreign innovative activity, however, is small relative to the role of U.S. innovative activity in explaining the dynamics of industry value added.
技术扩散在贸易和经济增长模式中往往起着关键作用。大多数现有的国际技术溢出的实证检验表明,溢出在解释生产率增长方面具有一定的作用。然而,确定知识溢出的直接和间接渠道的不同作用相对困难。这些渠道的影响往往是混淆的,因为在交叉部分或面板数据设置中,关注的是总要素生产率(TFP)和研发支出。本文采用另一种方法来研究直接知识溢出的作用。本文采用面板VAR方法对美国14个制造业1977 - 2004年间的加权国内专利、加权国外专利和增加值进行了实证研究,探讨了直接和间接知识溢出的动态作用。发现了直接知识溢出渠道作用的证据:在考虑了生产率/增加值的影响后,国外加权专利引用量的增加直接增加了国内加权专利引用量的增加。然而,与美国创新活动在解释产业增加值动态方面的作用相比,外国创新活动的作用较小。
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引用次数: 1
Cross-Border Effects of R&D Tax Incentives 研发税收优惠的跨境效应
Pub Date : 2019-10-11 DOI: 10.2139/ssrn.3484384
Bodo Knoll, Nadine Riedel, Thomas Schwab, Maximilian Todtenhaupt, Johannes Voget
Abstract Existing evidence shows that R&D tax incentives boost countries’ private sector R&D. Given the importance of multinational enterprises (MNEs) for private sector innovation, it is unclear, however, whether firms engage in genuinely new R&D or whether R&D is reallocated across borders. Drawing on data on unconsolidated R&D activity of MNEs in Europe, we provide evidence that responses are dominated by cross-border relocations: More generous tax incentives in one country increase MNEs’ R&D investments in affiliates located there, while lowering R&D investments in affiliates of the same MNE group located in other countries. Globally, firms hardly raise their R&D activities when tax incentives become more generous.
现有证据表明,研发税收优惠促进了国家私营部门的研发。然而,考虑到跨国企业对私营部门创新的重要性,尚不清楚企业是否从事真正的新研发,或者研发是否跨国界重新配置。根据欧洲跨国公司未合并研发活动的数据,我们提供了证据,证明跨国公司的反应主要是跨境搬迁:一国更慷慨的税收优惠增加了跨国公司在该国子公司的研发投资,同时降低了同一跨国公司集团在其他国家的子公司的研发投资。在全球范围内,当税收激励变得更加慷慨时,企业几乎不会增加研发活动。
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引用次数: 12
Measuring the Input Rank in Global Supply Networks 衡量全球供应网络中的投入等级
Pub Date : 2019-09-30 DOI: 10.2139/ssrn.3488349
Armando Rungi, Loredana Fattorini, Kenan Huremović
In this paper, we introduce the Input Rank as a measure to study the organization of global supply networks at the firm level. We model the case of a firm that needs assessing the technological relevance of each direct and indirect supplier on a network-like production function with labor and intermediate inputs. In our framework, an input is technologically more relevant if a shock on that upstream market can hit harder the marginal costs of a downstream buyer, considering the topology of the supply structure. A higher labor intensity at each stage buffers the transmission of upstream shocks in the network. In addition, we provide for the possibility that producers have limited knowledge of inputs in the supply network, hence they can underestimate the relevance of more distant inputs. After applications, the Input Rank returns a matrix of technological centralities that order any direct or indirect input for a representative firm in any output industry. We compute the Input Rank on U.S. and world input-output tables. Finally, we test how it correlates with choices of vertical integration made by 20,489 U.S. parent companies controlling 154,836 affiliates worldwide. We find that a higher Input Rank is positively associated with higher odds that that input is vertically integrated, relatively more when final demand is elastic. A supplier's Input Rank remains a significant predictor of a firm's decision to integrate even after controlling for the relative positions on upstreamness(downstreamness) segments.
本文在企业层面上引入投入等级这一度量来研究全球供应网络的组织。我们建立了一个公司的模型,该公司需要评估每个直接和间接供应商在具有劳动力和中间投入的网络生产函数上的技术相关性。在我们的框架中,考虑到供应结构的拓扑结构,如果上游市场的冲击能更严重地打击下游买家的边际成本,那么投入在技术上就更相关。每个阶段较高的劳动强度缓冲了网络中上游冲击的传输。此外,我们考虑到生产者对供应网络中投入的知识有限的可能性,因此他们可能低估了更远投入的相关性。在应用程序之后,输入排名返回一个技术中心矩阵,该矩阵对任何输出行业中具有代表性的企业的任何直接或间接输入进行排序。我们根据美国和世界的投入产出表计算投入排名。最后,我们测试了它与控制全球154,836家子公司的20,489家美国母公司所做的垂直整合选择的相关性。我们发现,更高的投入等级与更高的投入垂直整合的可能性呈正相关,当最终需求是弹性的时,相对更大。即使在控制了上游(下游)部分的相对位置之后,供应商的输入等级仍然是公司整合决策的重要预测因素。
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引用次数: 8
Usability of Educational Technology: Global Perspective 教育技术的可用性:全球视角
Pub Date : 2019-09-11 DOI: 10.11648/J.AJEIT.20190302.11
Irshad Ullah, Aamna Irshad
To enhance and improve process of education, the work is continuously in progress. Different researchers and educationist are busy to facilitate the learner as well as the teacher. Technology is also on the way of progress to make it user friendly. Despite of the use of technology in every field, the user faces problems while using and updating it. For its efficient use, some guidelines are always required by keeping in view the use and challenges of technology. The study was conducted in the form of documentary analysis that how new technology can be used to help and improve the process of teaching and learning. The objective of the study was to investigate the use of technology in the field of education. The results and discussion shows that with the use of this, the process of teaching and learning will be efficientl and effectives.
为了加强和改进教育过程,这项工作正在不断进行中。不同的研究者和教育家都在忙着为学习者和教师提供便利。技术也在进步,使其对用户友好。尽管技术在各个领域都有应用,但用户在使用和更新技术时也会遇到问题。为了有效地利用技术,总是需要一些指导方针,同时考虑到技术的使用和挑战。本研究以文献分析的形式进行,探讨如何使用新技术来帮助和改善教与学的过程。这项研究的目的是调查技术在教育领域的使用情况。结果和讨论表明,使用该系统,教学和学习的过程将是高效和有效的。
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引用次数: 0
Why Do User Communities Matter for Strategy? 为什么用户社区对策略很重要?
Pub Date : 2019-06-20 DOI: 10.2139/ssrn.3407610
Sonali K. Shah, F. Nagle
User communities represent a unique organizing structure for the exchange of ideas and knowledge. They are organizations composed primarily of users working collaboratively, voluntarily, and with minimal oversight to freely and openly develop and exchange knowledge around a common artifact. The prevalence of user communities appears to be on the rise, as evidenced by communities across a variety of fields ranging from software to Legos to sports equipment. In this essay, we discuss how firms can benefit from working with user communities––that is, we discuss the opportunities for firms to leverage user communities as a source of open innovation. We theorize the conditions under which user communities will emerge and function, and discuss the benefits that user communities can provide and the challenges they can create for firms, thereby illustrating the relevance and import of user communities to firms and the strategic management literature.
用户社区代表了一种独特的思想和知识交流的组织结构。它们是主要由用户组成的组织,用户协作地、自愿地工作,并且以最小的监督自由地、公开地围绕公共工件开发和交换知识。用户社区的流行程度似乎正在上升,从软件到乐高再到运动器材等各个领域的社区都证明了这一点。在这篇文章中,我们讨论了企业如何从与用户社区的合作中获益——也就是说,我们讨论了企业利用用户社区作为开放式创新来源的机会。我们将用户社区出现和发挥作用的条件理论化,并讨论用户社区可以为公司带来的好处和挑战,从而说明用户社区对公司和战略管理文献的相关性和重要性。
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引用次数: 8
Market Access, Spatial Inequality, and General Purpose Technologies 市场准入、空间不平等与通用技术
Pub Date : 2019-04-20 DOI: 10.2139/ssrn.3317926
Kohei Nagamachi
We study the interplay between the spatial distribution of economic activity and technological progress in the context of general purpose technologies with emphasis on market access. A tractable spatial equilibrium model is developed, in which ex-ante identical cities sort themselves into different technology generations through the interaction between migration, firms’ technology choice, and technological progress. Spatial inequality encourages technological progress, while the reverse causality has inverted-U-shaped effects. The interplay exhibits cross-city divergence and possibly convergence with/without persistent expansion of top cities, where convergence can limit technological progress and diffusion, and thus convergence itself, due to adjustment costs of technology adoption.
我们研究了在通用技术背景下经济活动的空间分布与技术进步之间的相互作用,重点是市场准入。建立了一个可处理的空间均衡模型,在该模型中,事前相同的城市通过迁移、企业技术选择和技术进步之间的相互作用将自己划分为不同的技术代际。空间不平等促进了技术进步,而反向因果关系具有倒u型效应。在顶级城市持续扩张的情况下,这种相互作用表现出跨城市的差异,并可能趋同。由于技术采用的调整成本,趋同可能限制技术进步和扩散,从而限制趋同本身。
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引用次数: 0
Productivity Gap and Inward FDI Spillovers: Theory and Evidence from China 生产率差距与FDI流入溢出:来自中国的理论与证据
Pub Date : 2019-03-16 DOI: 10.2139/ssrn.3353793
J. Shen, Hao Wang, S. Lin
This paper constructs a two-stage sequential game model to investigate the spillover effect of inward FDI on improving the efficiency of domestic firms in host countries. Our model shows that, given the optimal joint-venture policy made by foreign firms, the impact of spillover effect of inward FDI is contingent upon the productivity gap between the domestic firms and foreign ones. In particular, we demonstrate that the spillover effect of FDI inward varies negatively with the productivity gap between domestic low-productivity firms and foreign firms and works conversely for high-productivity firms. This result suggests that once the productivity gap widens, the entry of foreign firms will increase the efficiency of high-productivity firms and reduce the efficiency of low-productivity firms. The implication of our theoretical predictions is that once the productivity of domestic firms (high-productivity firms) is close enough to the world productivity frontier, they will incur the positive spillover effect from the entry of foreign firms. In contrast, the domestic firms with low productivity which are more distant from the world productivity frontier will perform worse owing to the entry of foreign firms, thus leading to the negative spillover effect. Using the data from over 570,000 firms in Chinese manufacturing industry in 2011, we advance the understanding of the theoretical model through empirical analysis.
本文构建了一个两阶段序贯博弈模型,考察了外商直接投资对东道国国内企业效率提升的溢出效应。我们的模型表明,在外资企业制定最优合资政策的情况下,外资外溢效应的影响取决于国内企业与国外企业的生产率差距。特别是,我们证明了FDI流入的溢出效应与国内低生产率企业和外国企业之间的生产率差距呈负相关,而对高生产率企业则相反。这一结果表明,一旦生产率差距扩大,外国企业的进入将提高高生产率企业的效率,降低低生产率企业的效率。我们的理论预测意味着,一旦国内企业(高生产率企业)的生产率足够接近世界生产率边界,它们就会招致外国企业进入的正溢出效应。而距离世界生产率前沿较远的国内生产率较低的企业,由于外国企业的进入,其绩效会变差,从而产生负溢出效应。本文利用2011年中国制造业57万家企业的数据,通过实证分析来加深对理论模型的理解。
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引用次数: 6
期刊
Development of Innovation eJournal
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