Überraschend ist im Mai die Arbeitslosigkeit gefallen. Diese positive Entwicklung wird sich im Juni zunächst fortsetzen. Diese Einschätzung basiert auf einem neuen methodischen Konzept, das Google-Aktivitätsdaten für die kurzfristige Prognose der Arbeitslosigkeit einsetzt. Gerade in...

Die große Wirtschaftskrise hat bisher nur verhaltene Spuren am Arbeitsmarkt hinterlassen. Angesichts der unsicheren weiteren konjunkturellen Entwicklung, der schlechten Auslastung der Arbeitskräfte in den Unternehmen und der hohen Kurzarbeit erwarten viele Beobachter zum Herbst einen...

The current economic crisis requires fast information to predict economic behavior early, which is difficult at times of structural changes. This paper suggests an innovative new method of using data on internet activity for that purpose. It demonstrates strong correlations between keyword...

We propose a duopoly model of competition between internet search engines endowed with different technologies and study the effects of an agreement where the more advanced firm shares its technology with the inferior one. We show that the superior firm enters the agreement only if it results in...

The current economic crisis requires fast information to predict economic behavior early, which is difficult at times of structural changes. This paper suggests an innovative new method of using data on internet activity for that purpose. It demonstrates strong correlations between keyword...

We study auction design when parties cannot commit themselves to the mechanism. The seller may change the rules of the game and the buyers choose their outside option at all stages. We assume that the seller has a leading role in equilibrium selection at any stage of the game. Stationary...

We consider second-price and first-price auctions in the symmetric independent private values framework. We modify the standard model by the assumption that the bidders have reference-based utility, where a publicly announced reserve price has some influence on the reference point. It turns out...

This paper studies the evolutionary stability of the unique Nash equilibrium of a first price sealed bid auction. It is shown that the Nash equilibrium is not asymptotically stable under payoff monotonic dynamics for arbitrary initial popu- lations. In contrast, when the initial population...

The importance of auction theory has gained increased recognition in the scientific community, the latest recognition being the award of the Nobel price to Vickrey and Mirrlees. Auction theory has been used in quite different fields, both theoretically and empirically. This paper connects recent...