中国乡城流动人口社会网络复杂性特征分析

借助社会网络等非正式制度方式实现再社会化是乡城流动人口融入城市生活的主要途径之一。对流动人口社会网络的分析不仅可以揭示其网络结构特点,也将为进一步研究流动人口再社会化过程提供理论基础。采用深圳市流动人口专项调查中的整体网络数据,借助复杂性科学,尤其是复杂网络的研究方法,系统分析了乡城流动人口社会支持网络与讨论网络的复杂性特征。在乡城流动人口社会网络中广泛存在小世界现象和无标度特性等复杂网络特征。复杂性科学可以为分析诸如乡城流动人口这样的复杂系统提供有效方法,也是拓展复杂性科学,尤其是复杂网络应用领域的有益尝试。     

Effects of extent and diversity of alliancing on innovation: the moderating role of firm newness

The purpose of this paper is to show the varying effects of alliance portfolio size and heterogeneity on innovation in biotechnology firms. Previous literature has indicated that the number and heterogeneity of partners in an alliance portfolio might have positive effects on innovativeness. Yet, engaging in multiple and heterogeneous collaborations also raises managerial costs and complexity levels disproportionally, potentially causing detrimental performance effects. Analysis of a unique panel dataset suggests that engaging in many alliances generally has a positive influence on a firm’s innovation output. Furthermore, maintaining diverse alliance portfolios and a high extent of alliancing jointly affects a firm’s innovation output ?negatively. By additionally showing that younger firms benefit disproportionally from both alliance portfolio diversity and size, this study provides a more nuanced view of alliancing effects.     

Analyse der Abwicklung von gesetzlichen Krankenkassen per sozialrechtlicher Schließung oder per Insolvenzverfahren

Private as well as statutory health insurers have various ways of insolvency. Although the Insolvency Act has been applied for statutory health insurance since 2010, these new options were not used up to now. Anyway, the legislators laid the preference out of closure. This article investigates how the priority of closure could be in contradiction to the applicability of the Insolvency Act. It is asked, whether the introduction of the insolvency capability of health insurance funds was rather to assimilate the frame conditions relating to pension promises than creating a real alternative. One reason could be, that the Insolvency Act is not only generally applicable in the liquidation of a health insurance fund, but potentially even the best alternative. The insolvency proceedings for example are advantageous for health insurance funds within the same group because the maximum load is split and lower than it would be by a closure by social law and in addition to that the PSV is obligatory. The results show, that the generally-accepted, not limited standard preference of closure as laid out by the legislators in § 171b (3) S. 2 SGB V, seems inexplicable. The paper draws parallels to private health insurance companies under Solvency II and opens up new perspectives for legislative measures.     

Expropriation risk and technology

This paper develops a unified framework to analyze the dynamics of firm investment in countries with poor legal enforcement. The firm's technology edge over the government generates endogenous property rights. Industry variation in the technology gap predicts a sectoral pecking-order of expropriations. Long-run investment distortions may be Pareto superior relative to persistent investment at the static optimum. The dynamics of investment and transfers depend on whether incentives (backloading) or efficiency (frontloading) concerns dominate at the initial division of surplus. An increase in government efficiency may reduce its welfare. The model provides a technology-driven rationale for the widespread use of conglomerate structures in emerging market countries.     

Warum Vertrauen wichtig ist — Der ökonomische Blickwinkel

Die Finanzkrise hat die ?ffentliche Aufmerksamkeit auf eine der Grundstützen des marktwirtschaftlichen Systems gerichtet: das Vertrauen der Marktteilnehmer untereinander. Friedrich L. Sell und Marcus Wiens erl?utern die verschiedenen Sph?ren des Vertrauens (Zweierbeziehung, Gruppe, gesamte Gesellschaft), welche Risiken mit dem Vertrauen verbunden sind und wie diese überwunden werden k?nnen.     

Optimal portfolios and Heston's stochastic volatility model: an explicit solution for power utility

Given an investor maximizing utility from terminal wealth with respect to a power utility function, we present a verification result for portfolio problems with stochastic volatility. Applying this result, we solve the portfolio problem for Heston's stochastic volatility model. We find that only under a specific condition on the model parameters does the problem possess a unique solution leading to a partial equilibrium. Finally, it is demonstrated that the results critically hinge upon the specification of the market price of risk. We conclude that, in applications, one has to be very careful when exogenously specifying the form of the market price of risk.     

Commitment and Trust as Drivers of Loyalty in Logistics Outsourcing Relationships: Cultural Differences Between the United States and Germany

This study examines differences in loyalty formation within logistics outsourcing relationships between Germany and the United States. A model of loyalty formation on the basis of commitment and trust is developed and differences between Germany and the United States are hypothesized. They are tested based on 795 logistics outsourcing relationships in the two countries using structural equation modeling. The results indicate that these relationships differ depending on cultural traits relating to trust and commitment. The findings are relevant for practitioners and academics as they paint a more globally informed picture of loyalty formation within logistics outsourcing relationships in which to base both managerial decisions and future research.     

Optimal disinflation in new Keynesian models

Central bankers' conventional wisdom suggests that nominal interest rates should be raised to attain a lower inflation target. In contrast, I show that the standard New Keynesian monetary model with rational expectations and full credibility predicts that nominal interest rates should be decreased to attain this goal. Real interest rates, however, are virtually unchanged. These results also hold in recent vintages of New Keynesian models with sticky wages, price and wage indexation and habit formation in consumption.     

Explorations in intercultural work integrated learning: Educational process for a Topsy-Turvy world

This paper investigates how work integrated learning (WIL) can be re-imagined/re-enacted as collaborative playgrounds of networks. To do this we first establish the working context for these reflections by exploring fragments of biography and the immediate catalyst which was a recent seminar held over 5 days, beginning in the rural Swedish town of Ed and, for the last 2 days, at University West in Trollhättan. We then set out to explore the normative and theoretical context of our approach before finally moving to an exploration of the concept of WIL via CLA and scenarios. Our overall goal is to describe some features of an expanded concept of WIL as it relates to intercultural learning. In doing this we hope to generate processes that facilitate the kind of learning necessary if we are to enable teachers and students to build sustainable futures they can realistically aspire to.     

How to learn new tasks: Shop floor performance effects of knowledge transfer and performance feedback

We investigate how learning and the task performance of individuals are affected by different forms of knowledge transfer. Whereas previous research has proven the positive performance impacts of knowledge transfer, self-observation and feedback mechanisms individually, we explore the cumulative effect of these factors on learning and performance. With the help of two laboratory experimental studies reproducing manufacturing tasks that are typical for industrial production, we show that explicit knowledge transfer is superior to other forms of knowledge transfer. Externally provided performance feedback in the form of cost information and non-financial performance indicators has no effect on the order of different forms of knowledge transfer. Moreover, external feedback does not even have an additional significant performance effect on learning new tasks irrespective of the type of knowledge transfer.