Uncertainty and sustainability in the management of rangelands

We analyze a dynamic and stochastic ecological-economic model of grazing management in semi-arid rangelands. The ecosystem is driven by stochastic precipitation. A risk averse farmer chooses a grazing management strategy under uncertainty such as to maximize expected utility from farming income. Grazing management strategies are rules about which share of the rangeland is given rest depending on the actual rainfall in that year. In a first step we determine a myopic farmer's optimal grazing management strategy and show that a risk averse farmer chooses a strategy such as to obtain insurance from the ecosystem: the optimal strategy reduces income variability, but yields less mean income than possible. In a second step we analyze the long-run ecological and economic impact of different strategies. We conclude that a myopic farmer, if he is sufficiently risk averse, will choose a sustainable grazing management strategy, even if he does not take into account long-term ecological and economic benefits of conservative strategies.     

Zur Nachhaltigkeit der Generationenverträge: Eine Diagnose der Kranken- und Pflegeversicherung

Employing the generational accounting approach, this paper analyses the stance of fiscal policy in Germany. We find that fiscal policy is presently not sustainable, which is mainly due to pay-as-you-go financed social insurance systems. In order to illustrate the relative impact, we isolate the Public Health Insurance and the Public Long Term Care Insurance. Our findings suggest that without radical reforms the implicit debt burden for future generations might reach a magnitude of more than two times the annual GDP and contribution rates to both schemes will explode during the next three decades.     

Inequality, Crime and Economic Growth. A Classical Argument for Distributional Equality

This paper studies the dynamic general-equilibrium interactions between inequality, crime and economic growth by embedding the rational choice-theoretical approach to criminal behavior in a heterogeneous-agents endogenous-growth OLG model. Based on their respective opportunity costs, individuals choose to specialize in either legal or criminal activities. While legal households contribute to aggregate goods supply over time by either working or building human capital, criminals make a living by expropriating legal citizens of part of the latter's income. An increase in inequality lowers the economy's growth rate and possesses negative welfare effects for all agents with endowments equal to or above average and for agents with endowment below average that are born sufficiently far in the future.     

Constitutional concepts within the process of European integration

In order to come to an understanding concerning the questions surrounding the drafting of a European constitution, one must differentiate the three different meanings of the word ‘constitution’ by virtue of the very nature of its beginnings. The concept of a constitution in the organisational sense is the first possible way to understand the term. As such, ‘Constitution'is synonymous with the organizational founding statute of any association or collective. Separate from this is a second possible context of the term, which refers to the legal meaning of the word. Here, the expression is understood as the highest legal norm of an autonomous legal order, its first and highest law. Within both of these meanings, one can speak of a ‘European Constitution’. A third, political way of understanding the term refers to the concept of the constitution as an ordering idea, which a specific place to the internal and external independent political unity combines and which orders from the outside inward. In other words, with this is concerned the question, why exactly this specific space within these specific limits to the independent political unity should be combined/bound. The introduction of such an order upon which can be founded, why exactly this concrete space in the specific limits as independent unity should be constituted, is still not today found for Europe.     

Competitive balance and gate revenue sharing in team sports

This paper shows that under reasonable conditions, increasing gate revenue sharing among teams in a sports league will produce a more uneven contest, i.e. reduce competitive balance. This result has significant implications for antitrust authorities and legislators, who have tended to assume that revenue sharing arrangements will necessarily promote competitive balance.     

The raw material basis of global value chains: allocating environmental responsibility based on value generation

A new approach to allocate environmental responsibility, the ‘value added-based responsibility’ allocation, is presented in this article. This metric allocates total environmental pressures occurring along an international supply chain to the participating sectors and countries according to the share of value added they generate within that specific supply chain. We show that – due to their position in global value chains – certain sectors (e.g. services) and countries (e.g. Germany) receive significantly greater responsibility compared to other allocation approaches. This adds a new perspective to the discussions concerning a fair distribution of mitigation costs among nations, companies and consumers.     

Overcoming localization of knowledge — the role of professional service firms

The literature on organizational learning asserts that external learning is often limited geographically and technologically. We scrutinize to what extent organizations acquire external knowledge by accessing external knowledge repositories. We argue that professional service firms (PSFs) grant access to nonlocalized knowledge repositories and thereby not only facilitate external learning but also help to overcome localization. Focusing on patent law firms, we test our predictions using a unique dataset of 544,820 pairs of European patent applications. Analyzing patterns of knowledge flows captured in patent citations, we find that accessing a PSF's repository facilitates the acquisition of external knowledge. As the effect is more pronounced for knowledge that is distant to a focal organization, we conclude that having access to a knowledge repository compensates for localization disadvantages. Copyright © 2013 John Wiley & Sons, Ltd.     

Telemedizin – Angebote,Chancen und Kosteneffektivität

Digitalisation of the health care system proceeds. Therefore it is to be expected that telemedicine applications will also be introduced into health care. Currently, the number of telemedicine applications in Germany is low and it is also scarce in comparison to foreign countries. This is striking because it is usually supposed that telemedicine applications have got a great potential to improve health care and reduce expenditures. Hence, this publication discusses offers, chances and the cost-effectiveness of telemedicine.     

Linking customisation of ERP systems to support effort: an empirical study

The amount of customisation to an enterprise resource planning (ERP) system has always been a major concern in the context of the implementation. This article focuses on the phase of maintenance and presents an empirical study about the relationship between the amount of customising and the resulting support effort. We establish a structural equation modelling model that explains support effort using customisation effort, organisational characteristics and scope of implementation. The findings using data from an ERP provider show that there is a statistically significant effect: with an increasing amount of customisation, the quantity of telephone calls to support increases, as well as the duration of each call.