Bubbles in asset markets have been documented in numerous experimental studies. However, all experiments in which bubbles occur pay dividends after each trading day. In this paper we study whether bubbles can occur in markets without dividends. We investigate the role of two features that are...

Lacking payment systems become a bottleneck for the vision of the Information Economy. In many cases payments of fractions of a cent, so-called micropayments, are of particular interest. In this paper we propose a framework to evaluate payment systems. The framework consists of a well structured...

Dieser Aufsatz gibt einen Überblick über die Optionen nationaler Umweltpolitikgestaltung, sofern ein Land von nationalen oder grenzüberschreitenden Umweltproblemen betroffen und zudem mit anderen Ländern wirtschaftlich eng verflochten ist. Für rein nationale Umweltprobleme wird der Einfluß...