A Fuzzy Clustering Algorithm Based on the Analogy with Mechanical Physics: MeccFuz

This paper presents a new algorithm of fuzzy clustering, based on analogy withmechanics physics. The vectors x_i are compared with `material points' and the clusters can be looked on as material points clouds, that are characterized byspecific units. The choice is based on a study of potential energy. Once a specificunit is chosen, we calculated the membership of the other units whit respect it.A study of a sociology test is performed and the results are very encouraging,though an further deepening is needed like a thermodynamics analogy application.     

Transition economies and trust building: a network perspective on EU enlargement

Many transition economies are characterised by a relativelyrudimentary institutional framework. Weak legislative structuresand the absence of effective market regulation and propertyright enforcement rules diminish the chance of mutually profitablebusiness transactions and—more generally—restrictthe chances for innovation and sustainable growth. Against thisbackground, we analyse the extent to which more efficient governancemechanisms can contribute to a more favourable business environment.In doing so, we adopt a network perspective. We argue that bothin developed market economies as well as in centrally plannedeconomies much of economic exchange takes place in networks.However, the characteristics of these networks, in particularthe concept of trust, can differ significantly. This leads usto conclude that the real challenge of the process of economictransition is connected to building new economic exchange networks.In this paper, we discuss this argument and analyse how thecurrent enlargement of the EU into Eastern Europe may favourablyaffect this process of institutional change in the accessioncountries.     

Why “service”?

“Service-dominant logic” appears to have found resonance in the marketing community since its introduction as the evolving, “new dominant logic” in the Journal of Marketing (Vargo and Lusch 2004a, Journal of Marketing, 68, 1–17 (January)). But, on occasion, so has the question of whether the concept “service” captures the essence of the new logic. This article addresses the role of “service” as the heart of value-creation, exchange, markets, and marketing, as well as its considerable implications for research, practice, societal well-being, and public policy. The purposes are both to clarify the issues and to foster the continuing dialog around the service-dominant logic for marketing, as well as for other disciplines.     

农户小额信贷信用风险控制研究——基于新疆玛纳斯县、吐鲁番市、托克逊县的农户调查

本文基于对新疆玛纳斯县、吐鲁番市、托克逊县农村农户的实地调查,从社会学制度变迁角度,运用博弈分析的方法,研究了农户小额信贷信用风险控制问题。指出影响农户小额信贷信用风险的三个关键因素:1.在农村初步构建起制度信任安排约束的信用工程。2.农村信用社对信贷员激励相容的内控机制设计。3.小额信贷额度控制和联保贷款风险控制技术。     

股票流动性与企业创新：促进还是抑制——企业异质性视角

基于2010—2017年我国沪深A股1281家上市公司数据，从企业异质性视角分析股票流动性对企业创新的影响。结果发现：总体来看，股票流动性会抑制企业创新，而且对后期抑制作用更大；企业规模和行业特征是影响“股票流动性-企业创新”关系的重要因素，即股票流动性对大型企业和传统行业企业创新具有促进作用，而对中小型企业和高科技行业企业具有抑制作用。进一步机制研究显示，稳定型机构投资者和交易型机构投资者在股票流动性与企业创新间起双中介作用，虽然股票流动性对二者的作用方向相反，但最终都会导致企业创新水平下降。     

On Social Statement Spaces

In this fundamental draft we shall introduce the concept of social propositional spaces as a general notion of social science and in particular language, logic and methodology. This should help us bridge an old gap between extension and cognition, or said in more specific words, between space as conceived in mathematics or physics and space as is brought in by social location, by the meaning of predicates, their explanation and logic. ¹ We shall not rely on the idea of factor analysis where some “main components” are fit into the data. Because the notion of euclidean normalization and orthogonality, in this context, is a bit artificial. We first show how combinatorial manifolds of statements can be represented in finite vector spaces over the Galois field F₂. This space which we denote as logic statement space can be spanned by generators of alternating codes. In this way the old concepts of truth tables and interaction attributes can be linked to informatics and in particular code theory and geometry. Extending the logic statement space onto a real vector space by mapping units of the finite rings onto units of the real rings we obtain logistic statement spaces. It turns out that vectors in logistic statement spaces represent cross-tables of logits connected with logistic regression analysis. As a completion of the theory we show that the logit is the first derivative of entropy with respect to probability.     

Empirical evidence on the impact of external monitoring on book–tax differences

This study investigates whether institutional ownership levels are associated with levels of and time-series variability in book–tax differences (BTDs). Firm and year fixed-effects regression results suggest that institutional ownership is negatively associated with total, permanent, and temporary BTDs. This effect is driven primarily by permanent BTDs in the pre-SOX era but is consistently present for both permanent and temporary BTDs post-SOX. Further, this negative association is present regardless of firms' classification as “tax planners” and/or “earnings managers.” Finally, the results provide some evidence that stronger monitoring by the board and audit committee (i.e., a smaller and more independent board and a larger audit committee) is associated with lower permanent BTDs but is not consistently related with total or temporary BTDs. Overall, these findings are consistent with higher levels of institutional ownership equating to more effective monitoring of management, resulting in lower BTDs (in terms of both levels and time-series variability).     

透明度变化对股票市场投资者委托单提交行为和交易成本影响研究

基于2003年12月8日沪深交易所交易前市场透明度改革背景,本文利用一家营业部的投资者报价和交易数据,研究同一个机构投资者和散户投资者在透明度改革前后委托单提交激进程度的变化,以及这种变化对其完成交易的成本的影响。我们发现,透明度改革前后,机构投资者的委托单提交激进程度都显著大于散户投资者的委托单提交激进程度。透明度增加以后,机构投资者的委托单激进程度显著减少,而散户投资者的委托单提交激进程度增加。同时发现,透明度增加以后,机构投资者通过分拆委托单,增加交易次数,导致完成交易的时间增加,但价格影响力基本没有变化,散户投资者的成交时间和价格影响力有显著改善。     

物流服务供应链:理论架构与研究范式

文章为给物流服务供应链的研究提供理论架构,在对物流服务供应链的内涵和结构进行归纳的基础上,提出了物流服务供应链的研究基础:企业物流网络。并对企业物流网络的内涵、运作和结构进行剖析。提出了物流服务供应链的研究范式:服务主导逻辑。对服务主导逻辑的内容进行了探讨,在此基础上,对服务主导逻辑下物流服务供应链的价值创造机理与传导规律进行了研究。最后,提出了服务主导逻辑下的物流服务供应链的未来研究主题。     

经济全球化与中国工业结构变化

理论分析显示经济全球化能通过固定资产投资、制度变迁和劳动力等因素引发中国工业结构变化。运用协整分析和ECM等方法实证检验显示长期内经济全球化增长1%将促使我国工业结构变化0.27%,固定资产投资、制度变迁和劳动力均能促进我国工业结构变化,而短期内经济全球化和劳动力可能制约工业结构变化。