In this paper the relatively new technique of neural nets is integrated in a traditional model of portfolio choice. On the basis of Arrow’s State Preference Model the investment decision depends on the expectation building process which consists of two components. The individual information...

50 Jahre nach Joseph A. Schumpeters Tod am 8. Januar 1950 ist sein wissenschaftliches Werk noch immer von aktueller Relevanz. Professor Horst Hanusch, Generalsekretär der Internationalen Joseph A. Schumpeter Gesellschaft, würdigt das Werk des bedeutenden Ökonomen.

The paper examines public expenditures and their effects on economic growth. For that purpose we choose four categories of expenditures, defence, infrastructure, human capital and R & D expenditures. Behind these expenditures stands, in socio-political consideration, a certain notion of the...

The study intends (1) to look at the importance of individual rationality as the main principle of economic behaviour, incorporated best in the concept of "homo oeconomicus". (2) to show how the third technological revolution, the "digitalization of society", may transform individual behaviour...

In the last decades the world changed dramatically. From a global point of view three disruptive processes are on their way which can be called revolutionary: a political, a technological and an economic revolution. This paper aims to give an overview when and how these movements started what...

Summary With this paper we attempt to complement the discussion on price volatility on stock markets by an approach, which can also take into consideration so-called nonrational behaviour. This happens by formally integrating socioeconomic elements into the price expectation process of the share...

Zusammenfassung In der vorliegenden Studie wird mit Hilfe der nicht-parametrischen DEA-Methode die relative Effizienz von representativ ausgewählten Stromversorgungsunternehmen in Deutschland bestimmt. Die DEA erlaubt es, auch nicht marktfähige In- und Outputfaktoren in die Analyse...

Summary In this paper we add new results to the investigation of productivity levels rather than productivity changes, as proposed by Hall/Jones (1996, 1997, 1999). To obtain measures of relative productivity levels we depart from traditional growth accounting and calculate the Malmquist index...

This paper deals with a conceptual framework allowing the analysis of long-run qualitative change in the energy system. The energy sector seems to be particularly appropriate for the analysis of qualitative change due to the following reasons: The energy sector is relevant for the development of...