Rare and randomly occurring events are important features of the economic world. In continuous time they can easily be modeled by Poisson processes. Analyzing optimal behavior in such a setup requires the appropriate version of the change of variables formula and the Hamilton-Jacobi-Bellman...

We derive a class of utility functions that are equivalent with respect to a well-defined functional form. We study the case of constant relative risk aversion (of some order) to investigate on different equivalence relations in order to determine the, possibly infinite, number of equivalence...

Ende der 90er Jahre schien eine intensive Auswahl der Investments kaum notwendig, da fast jede Aktienanlage deutliche Kursgewinne versprach. Nach dem jähen Absturz an den Börsen haben die Anleger einen beträchtlichen Teil ihres Aktienvermögens verloren. Damit rücken wieder verstärkt...

Die Untersuchung analysiert das Sparverhalten der über 30- bis unter 50jährigen Personen bzw. Haushalte mit Haushaltsvorständen in dieser Altersgruppe in Reaktion auf erhaltene Erbschaften bzw. Transfers zu Lebzeiten. Zugrunde liegen aktuelle Daten des Sozio-oekonomischen Panels. Mittels...

Owners of private companies are often highly underdiversified which exposes them to idiosyncratic risk. We investigate the consequences of underdiversification at the company level. Information on US companies and their owners is obtained from the Survey of Consumer Finances and the Survey of...

Investments in socially responsible investments (SRI) are still a small, but growing segment of international capital markets. This study analyses whether a SRI screening process applied to equities results in a different performance outcome compared to relevant conventional benchmark indexes....

Im Oktober 1998 befragte das ZEW rund 250 Finanzexperten aus Banken, Versicherungen, Kapitalanlagegesellschaften und großen Industrieunternehmen nach ihren Empfehlungen zur Gestaltung eines Vermögensportfolios zur Altersvorsorge. Dieses Papier untersucht in einem ersten Schritt, ob in...

This study provides detailed evidence on the transistion state of Central and Eastern Europe (CEE) countries. It draws on data from a survey conducted among portfolio managers of Western investment funds thereby making use of the knowledge of experts in CEE markets. The approach of the study is...

Owners of private companies often invest a substantial share of their net worth in one company, which exposes them to idiosyncratic risk. For US companies we investigate whether owners require compensation for lack of diversification in the form of higher returns to equity. Exposure to...

The aim of this study is the analysis of so called socially responsible investments (SRI). First, the performance of SRI equity investment funds and equity indices is investigated using Jensen´s alpha as performance measure. The analysis considers market timing strategies of the fund management...