In a recent paper, Homburg and Richter have argued that with free mobility of labor within a common labor market there is a need to harmonize and even consolidate pay-as-you-go financed national public pension systems to reach an efficient allocation of labor. We show that with free and...

For pay-as-you-go financed pension systems, claims may be calculated according to individual contributions (income) or the number of children of a family. We analyse the optimal structure of these parameters in a model with endogenous fertility. It is shown that for both structural determinants...

Intergenerational redistribution is one of the major aims of national welfare states that have to prove their reliability in a world of internationally integrated goods and factor markets. In this paper, we analyse the conditions for the existence of steady-state equilibria and the (Pareto-)...

In this paper we analyse the possibility to construct intergenerational criteria of choice within the framework of methodological individualism. The main result of this analysis is, that intergenerational criteria as an aggregation of preferences of current and future individuals do not exist....

This paper considers the players' behaviour in an asymmetric two-player contest. When do they decide to "struggle" and when to "subjugate"? Analysing contest-success functions it is found that two crucial prerequisites for "struggle" or "war" have to be met. Thus, such an equilibrium is possible...

In einem Europa integrierter Güter- und Faktormärkte stehen die nationalen Systeme Sozialer Sicherung zunehmend auf dem Prüfstand. Mit der Schaffung des gemeinsamen Marktes wurden die individuellen Verfügungsrechte verändert. In diesem Essay werden diese Änderungen bezüglich den Zielen...