Pragmatik statt Paradigma — Diskurs über die zeitgeistige Evolution des Marketing

Das klassische Marketing ist vom interaktiven Community Marketing nicht überholt worden. Der scheinbare Methodenstreit zwischen „alter“ und „neuer“ Schule ist keine wirklich spannende Paradigmen-Diskussion. Die Praxis sollte weitergehen und Evolution statt Revolution proklamieren, das Beste aus mehreren Welten machen und insbesondere in schwierigen Zeiten dynamisch und intelligent von anderen M?rkten und Methoden lernen.     

Ruin time and aggregate claim amount up to ruin time for the perturbed risk process

We consider the classical Sparre-Andersen risk process perturbed by a Wiener process, and study the joint distribution of the ruin time and the aggregate claim amounts until ruin by determining its Laplace transform. This is first done when the claim amounts follow respectively an exponential/Phase-type distribution, in which case we also compute the distribution of recovery time and study the case of a barrier dividend. Then the general distribution is considered when ruin occurs by oscillation, in which case a renewal equation is derived.     

An examination of the effect of messages on cooperation under double-blind and single-blind payoff procedures

Previous research has suggested that communication and especially promises increase cooperation in laboratory experiments. This has been taken as evidence for internal motivations such as guilt aversion or preference for promise keeping. The goal of this paper was to examine messages under a double-blind payoff procedure to test the alternative explanation that promise keeping is due to external influence and reputational concerns. Employing a 2×2 design, we find no evidence that communication increases the overall level of cooperation in our experiments with double-blind payoff procedures. However, we also find no evidence that communication impacts cooperation in our experiments with single-blind payoff procedures. Further, the payoff procedure does not appear to impact aggregate cooperation.     

An effective method for constructing bounds for ruin probabilities for the surplus process perturbed by diffusion

In this paper, we first study orders, valid up to a certain positive initial surplus, between a pair of ruin probabilities resulting from two individual claim size random variables for corresponding continuous time surplus processes perturbed by diffusion. The results are then applied to obtain a smooth upper (lower) bound for the underlying ruin probability; the upper (lower) bound is constructed from exponentially distributed claims, provided that the mean residual lifetime function of the underlying random variable is non-decreasing (non-increasing). Finally, numerical examples are given to illustrate the constructed upper bounds for ruin probabilities with comparisons to some existing ones.     

Dealing with Darwin: How Great Companies Innovate at Every Phase of Their Evolution by Geoffrey A. Moore

Books reviewed in this issue:

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  Dealing with Darwin: How Great Companies Innovate at Every Phase of Their Evolution

       

The Expected Discounted Penalty at Ruin for a Markov-Modulated Risk Process Perturbed by Diffusion

Abstract

A Markov-modulated risk process perturbed by diffusion is considered in this paper. In the model the frequencies and distributions of the claims and the variances of the Wiener process are influenced by an external Markovian environment process with a finite number of states. This model is motivated by the flexibility in modeling the claim arrival process, allowing that periods with very frequent arrivals and ones with very few arrivals may alternate. Given the initial surplus and the initial environment state, systems of integro-differential equations for the expected discounted penalty functions at ruin caused by a claim and oscillation are established, respectively; a generalized Lundberg’s equation is also obtained. In the two-state model, the expected discounted penalty functions at ruin due to a claim and oscillation are derived when both claim amount distributions are from the rational family. As an illustration, the explicit results are obtained for the ruin probability when claim sizes are exponentially distributed. A numerical example also is given for the case that two classes of claims are Erlang(2) distributed and of a mixture of two exponentials.     

Resilience,wellbeing and HRM: a multidisciplinary perspective

Abstract

Research on resilience has accumulated a vast body of knowledge which has assisted in comprehending complex HRM issues in diverse organizational settings. Yet, the existing studies have hitherto not paid sufficient attention to the multifaceted aspects of resilience and occupational contexts. We join the conversation with resilience, wellbeing and HRM by suggesting that investigating resilience from a multidisciplinary perspective situated in varying occupational contexts can advance our collective understandings of the phenomena in important ways. This paper has three general objectives. First, we show that resilience has been a long-standing issue in organizational behavior and organization studies and provide an overview of the puzzles that underpin and trigger this special issue. Second, we highlight the key insights and contributions of the papers included in this special issue by reviewing their theoretical underpinnings, methodological approaches and findings. Finally, we outline a future research agenda on resilience in organizations that can help advance international HRM research.     

在不断增长的市场中,规模至关重要--2004年全球最大的225家国际承包商

公共项目的市场需求与日俱增,从而促使国际承包商不仅仅扮演项目建设者的角色,它们还将从事项目的开发和融资工作。这股趋势推动建筑市场不断发展壮大,但它同时也意味着新兴的或者规模较小的国际承包公司在未来将面临更严峻的挑战。总体而言,国际工程市场继续保持增长态势。《工程新闻记录》(ENR)杂志评选出的2004年全球最大的225家国际承包商的国际市场营业总额为1674.9亿美元,比2003年的1398.2亿美元增长了19.8%。尽管市场需求似乎非常旺盛,但许多承包商并没有大规模采取行动。德国比尔芬格柏格公司(BilfingerBergerBau)国际业务部负责…     

Application of Relational Models in Mortality Immunization

The prediction of future mortality rates by any existing mortality models is hardly exact, which causes an exposure to mortality (longevity) risk for life insurers (annuity providers). Since a change in mortality rates has opposite impacts on the surpluses of life insurance and annuity, hedging strategies of mortality and longevity risks can be implemented by creating an insurance portfolio of both life insurance and annuity products. In this article, we apply relational models to capture the mortality movements by assuming that the realized mortality sequence is a proportional change and/or a constant shift of the expected one, and the size of the changes varies in the length of the sequences. Then we create a variety of non-size-free matching strategies to determine the weights of life insurance and annuity products in an insurance portfolio for mortality immunization, where the weights depend on the sizes of the proportional and/or constant changes. Comparing the hedging performances of four non-size-free matching strategies with corresponding size-free ones proposed by Lin and Tsai, we demonstrate with simulation illustrations that the non-size-free matching strategies can hedge against mortality and longevity risks more effectively than the size-free ones.