Unternehmenskonzentrationen im Weltbergbau warfen die Frage auf, ob die bisher problemlose Rohstoffversorgung der deutschen Wirtschaft über die Weltmärkte und ohne wesentliche eigene Rohstoffengagements im Ausland gefährdet werden könnte. In der Studie werden die Märkte von zehn...

This paper presents two new tools for the identification of faking interviewers in surveys. One method is based on Benford's Law, and the other exploits the empirical observation that fakers most often produce answers with less variability than could be expected from the whole survey. We focus...

We study the political economy of commuting subsidies in a model of a monocentric city with two income classes. Depending on housing demand and transport costs, either the rich or the poor live in the central city and the other group in the suburbs. Commuting subsidies increase the net income of...