Die derzeitigen Altersvorsorgesysteme stehen durch die demographischen Entwicklungen in den meisten Industrieländern in absehbarer Zukunft vor gravierenden Problemen. Da die staatliche Alterssicherung keine adäquate Versorgung im Alter sicherstellt, muss zusätzlich eine Absicherung durch...

Population growth is often viewed as a most oppressive global problem with respect to environmental deterioration. In this paper, we investigate the optimal development of a coupled system comprising population, economy, and the natural environment as subsystems. In our formal dynamic model...

Population growth is often viewed as a most oppressive global problem with respect to environmental deterioration, but the relationships between population development, economic dynamics and environmental pollution are complex due to various feedback mechanisms. We analyze society’s economic...

In this paper, we investigate the external effects of the parent's decisions on the number of newly born children and the firm's decisions on the amount of polluting emissions that occur in industrial production. We employ an optimal control model which comprises three stock variables...

This paper introduces a democratic voting process into an OLG economy in order to analyze the e ffects of a rising old-age dependency ratio on the composition of government spending and endogenous economic growth. Forward-looking agents vote each period on the public policy mix between...

We analyze the short and long run effects of demographic ageing - increased longevity and reduced fertility - on per-capita growth. The OLG model captures direct effects, working through adjustments in the savings rate, labor supply, and capital deepening, and indirect effects, working through...

In this article, an updated approach to investigate the effects of demographic fac- tors on economic growth is proposed. The initial hypothesis was that these factors significantly affected production proportions, determining development vectors. The predictable shifts in production dynamics are...

Our study examines the regional patterns and determinants of migration flows of young women. At the NUTS-3 regional level, i.e. the district level (Kreise), the German internal migration flows of the year 2005 are explored. From descriptive statistics it can be seen that peripheral regions in...