I study a repeated principal-agent game with long-term output contracts that can be renegotiated at will. Actions are observable but not contractible, so they can only be incentivized through implicit agreements formed in equilibrium. I show that contract renegotiation is a powerful tool for...

We study a communication game between an informed sender and an uninformed receiver with repeated interactions and voluntary transfers. Transfers motivate the receiver's decision-making and signal the sender's information. Although full separation can always be supported in equilibrium, partial...

The global economic crisis has led to a massive increase in unemployment, and nearly all governments have declared the protection of domestic jobs to be a central economic policy aim. In the US, an additional $790-billion economic stimulus package was adopted immediately after President Obama...

Die globale Wirtschaftskrise führt zu einem massiven Anstieg der Arbeitslosigkeit, und fast alle Regierungen haben die Sicherung der heimischen Beschäftigung zu einem zentralen Ziel ihrer Wirtschaftspolitik erklärt. In den USA wurde sofort nach dem Amtsantritt von Präsident Obama ein...

This paper explains why the approach taken so far to mitigate global climate change has failed. The central reason is an inability to enforce targets and timetables. Current proposals recommending even stricter emission limits will not help unless they are able to address the enforcement...

As a major trading power in the world, the European Union is an important trading partner for five emerging economies, namely Brazil, Russia, India, China and South Africa (the BRICS countries). The EU is particularly interested in protecting the interests of developing countries and supports...

The aim of this paper is to highlight the political limits and the strategic and geopolitica ldilemmas of the European Union’s approach concerning the Eastern Neighbourhood. For this reason, the research will examine the main steps of the implementation of the Eastern Partnership and the main...

Vereinbaren nationale Regierungen internationale Abkommen und Verträge, haben sie ein Selbstbindungsproblem: Sie sagen ihren Regierungspartnern aus anderen Ländern zu, dass sich ihr Heimatland in der Zukunft an heute vereinbarte internationale Abkommen und Verträge halten wird. Doch wissen...

Nachdem Joe Biden die Präsidentschaftswahlen in den USA für sich entscheiden konnte, stellt sich die Frage, wie sich die transatlantischen Beziehungen zwischen den USA und der Europäischen Union zukünftig entwickeln werden. Das Verhältnis zwischen der USAdministration unter Donald Trump und...