Gas storage valuation under limited market liquidity: an application in Germany

Natural gas storages may be valued by applying real options theory. However, it is crucial to take into account that most evolving gas markets, like the German spot market, lack liquidity. This implies that large-scale operation of storages reduces the achievable operating margin since storage operators will pay higher prices for injected gas and earn less on withdrawn gas. Optimal storage operation will take this into account. In this context, considering storage operators as price takers does not account for interdependencies of storage operations and market prices. This paper offers a novel approach to storage valuation taking into account the effect of management decisions on market prices. The methodology proposed within this paper determines the optimal production schedule and value by determining the stochastic differential equation describing the storage value and then applying a finite difference scheme. We find that limited liquidity lowers the storage value and reduces withdrawal and injection amounts. Further, we observe decreasing reservation prices for injection and withdrawing for growing illiquidity resulting in a left shift of injection and withdrawing threshold prices.     

Der prognostische Gehalt der Nachrichtenwert-Theorie

In this article, news value theory is reformulated in a way that allows for predicting the length of news stories by the news value of news factors, and by the news factors of single stories. From a part of a sample, the news value of news factors is determined, and the expected length of stories is calculated for another part of the sample. Calculated length is then compared with measured length. There is a correlation of r =.54 between theoretical and empirical values. Theoretical and methodological conclusions are drawn from the results of the various analytic steps.     

User,Use & Utility Research

Business and Information Systems Engineering (BISE) is at a turning point. Planning, designing, developing and operating IT used to be a management task of a few elites in public ad-ministrations and corporations. But the continuous digitization of nearly all areas of life changes the IT landscape fundamentally. Success in this new era requires putting the human perspective – the digital user – at the very heart of the new digitized service-led economy. BISE faces not just a temporary trend but a complex socio-technical phenomenon with far-reaching implications. The challenges are manifold and have major consequences for all stakeholders, both in information systems and management research as well as in practice. Corporate processes have to be re-designed from the ground up, starting with the user’s perspective, thus putting usage experience and utility of the individual center stage. The digital service economy leads to highly personalized application systems while organizational functions are being fragmented. Entirely new ways of interacting with information systems, in particular beyond desktop IT, are being invented and established. These fundamental challenges require novel approaches with regards to innovation and development methods as well as adequate concepts for enterprise or service system architectures. Gigantic amounts of data are being generated at an accelerating rate by an increasing number of devices – data that need to be managed. In order to tackle these extraordinary challenges we introduce ‘user, use & utility’ as a new field of BISE that focuses primarily on the digital user, his or her usage behavior and the utility associated with system usage in the digitized service-led economy. The research objectives encompass the development of theories, methods and tools for systematic requirement elicitation, systems design, and business development for successful Business and Information Systems Engineering in a digitized economy – information systems that digital users enjoy using. This challenge calls for leveraging insights from various scientific disciplines such as Design, Engineering, Computer Science, Psychology and Sociology. BISE can provide an integrated perspective, thereby assuming a pivotal role within the digitized service led economy.     

Das neue Energiewirtschaftsgesetz—Regelungen für einen erweiterten Zielkatalog

Mehr als ein Jahr nach dem EU-rechtlich vorgegebenen Endtermin wurde im Juli 2005 das neue Energiewirtschaftsgesetz verabschiedet. Von welchen Zielen geht dieses Gesetz aus? Wie lauten seine wichtigsten Neuregelungen? Und welche Auswirkungen sind von ihnen zu erwarten?     

Premiummarken im Sortiment des Einzelhandels — Erscheinungsformen und Entwicklungsperspektiven

Das Führen von Premiummarken bietet dem Einzelhandel unter den aktuellen Marktbedingungen nicht nur M?glichkeiten einer individuellen Akzentuierung und Differenzierung von Sortimenten, sondern auch interessante Entwicklungsperspektiven.Wesentliche Herausforderungen bestehen dabei in einer zielgruppenbezogenen Entwicklung von Premiummarkenstrategien sowie in einer st?rkeren Professionalisierung der Markenführung.