Diffusion in complex social networks

This paper studies how a behavior spreads in a population. We consider a network of interacting agents whose actions are determined by the actions of their neighbors, according to a simple diffusion rule. We find, using a mean-field approach, the threshold for the spreading rate above which the behavior spreads and becomes persistent in the population. This threshold crucially depends on the connectivity distribution of the social network and on specific features of the diffusion rule.     

Optimal proportional reinsurance policies for diffusion models

Abstract

When applying a proportional reinsurance policy π the reserve of the insurance company is governed by a SDE =(a_π (t)u dt + a_π (t)σ dW_t where {W_t } is a standard Brownian motion, µ, π, > 0 are constants and 0 ? a_π (t) ? 1 is the control process, where a_π (t) denotes the fraction, that is reinsured at time t. The aim of this paper is to find a policy that maximizes the return function V_π (x) = where c > 0, τ_π is the time of ruin and x refers to the initial reserve.     

HRMization in Turkey: expanding the rhetoric-reality debate in space and time

Building on the debate in HRM literature which asserts that rhetorics and realities about HRM diverge, the concept of HRMization is developed to make sense of complex processes that tend to happen when the HRM label travels in space and time. Subsequently, some of the interesting dynamics of the HRMization process, as it has taken place in the Turkish context, are explored by means of a large sample of extensive textual analyses and in-depth interviews. The findings indicate that HRMization has not just taken place at the rhetorical level, but has also meant changes at the activity level for professionals and other organizational members. Local rhetorics of HRM are found to be affected by the debates on the nature of HRM in the European context and tend to decouple, in some aspects, from activities that are conducted under the HRM label. Moreover, being a ‘receptive country’, Turkish experience also reveals differential adoption patterns for diverse organizational structures as these structures have varying degrees of access to inflowing state-of-the-art HRM ideas.     

创新扩散视角下知识产权制度完善策略研究

基于创新扩散相关理论,对我国知识产权法第四次全面修订进行考察,探讨与创新扩散密切相关的专利制度与著作权制度修订的具体内容,分析其中尚未遵循技术创新扩散规律的情形,并提出完善知识产权制度,促进创新扩散的策略建议。     

社会网络视角下技术创新扩散系统构建研究

界定了技术创新扩散系统的概念,从社会网络视角构建了技术创新扩散系统模型,分析了扩散源、中介通道、采纳者等相关节点之间的关联、互动关系,从市场环境、政策环境和社会环境3个方面提出了敦促采纳者采纳技术创新成果、保障技术创新扩散系统有效运行的措施。     

“To buy or to pirate”: The matrix of music consumers' acquisition-mode decision-making

The decision to engage in music piracy may be preceded by consumer consideration of a range of issues. The determinants of such piracy as embedded in a large matrix of acquisition-mode decision factors relevant to exchange theory, including economic, legal, ethical, network and consumer behavior aspects, are investigated here. This matrix depicts numerous interrelated factors and makes assessing the decision-making process regarding music piracy more contextual than previously considered. A study of 204 American business students was conducted to test this matrix and assess the impact of the various factors. Implications and future research regarding this decision-making matrix and exchange theory are provided. The significant factors predict whether an exchange takes place between music consumers and the music industry.     

用户交互对产品知识认知扩散的影响及社区激励研究

网络产品社区中以用户发帖、评论为代表的深度交互行为是快速认知新产品知识并传播扩散的动力源泉。基于社会资本理论,依托小米社区论坛手机产品板块,采用数据挖掘与社会网络分析方法,分别从具有典型交互行为特征用户的发帖数量与质量角度,研究用户交互对产品知识认知扩散的影响。结果表明,用户发帖作为响应社区活动的特殊评论形式,其发帖数量对扩散有显著正向影响;发帖题目长度对扩散有显著负向影响;过长或过短的发帖内容长度都会对扩散产生显著负向影响;新帖发布者的发帖内容平均长度与用户社交行为习惯相吻合,简要少量的信息能够有效激励用户的高频次交互。研究结果有助于指导社区针对典型交互行为特征用户提出相应的激励策略,促进社区新产品推广并使用户快速形成产品认知。     

Making new products go viral and succeed

Why are some new product introductions more viral and successful than others? This research integrates theories of interpersonal communication and consumer learning to explore this question. Analyzing a unique data set of millions of consumer word-of-mouth transmissions (eWOM) on social media regarding 345 new automobile products introduced during 2008–2015, we find that more innovative products generate more eWOM volume but surprisingly less positive sentiment. These effects vary in magnitude across eWOM channels. However, the use of rich-content communication, pre-announcement, and cobranding strengthens (weakens) the positive (negative) effect of product innovativeness on eWOM volume (sentiment). The results further indicate that eWOM sentiment is a stronger predictor of new product success than eWOM volume. Experimental results reveal more insights into how product innovativeness influences eWOM metrics in several product categories and shed light on the role of excitement and perceived risk as mechanisms underlying these effects. The research offers useful implications for firms to design effective viral marketing campaigns to enhance new product success.     

成渝经济圈R & D空间溢出网络结构研究

利用修正空间引力模型和社会网络分析法,对成渝经济圈R&D空间溢出网络结构进行探索。研究发现,成渝经济圈R&D分布的地缘邻近性显著,南北贯线的地缘邻近性明显强于东西贯线的空间相似性;区域R&D空间溢出的网络结构具有“主核-多中心”特点,“强链”和 “弱链”区域分异明显;区域内R&D空间溢出的出度和入度两极分化严重,区域间R&D空间溢出不完全服从区域经济发展水平势差所带来的方向性;整体来看,区域内R&D空间溢出四大凝聚子群基本契合区域经济整合的边界分异。     

技术扩散能否成为区域创新效率提升的新动能——研发要素流动视角

基于研发要素流动视角,利用我国内地30个省市2002-2017年面板统计数据,通过空间杜宾模型和面板门槛回归模型,对技术扩散影响区域创新效率提升情况进行探究。研究结果发现：我国区域创新效率呈现波动收敛态势,其中,东部创新效率最高,中西部创新效率次之,且两者交替上探下潜;技术扩散能够驱动区域创新效率提升,其中,本土技术扩散表现出显著的边际递减驱动力,而国际技术扩散呈现出不显著的边际递增驱动力;技术扩散能够引发研发要素流动,其中,研发资本流动能够积极改善区域创新效率,而研发人员流动表现出抑制作用。