The economic tradition of ordoliberalism, understood as the theoretical and policy ideas of the Freiburg School, emerged in 1930s and 1940s Germany. In the years thereafter, it was quickly superseded by Keynesianism and other theories imported from the English-speaking world. The crisis in...

I estimate fiscal reaction functions to analyze the cyclical behavior of discretionary measures in the euro area and the potential impact of changes in the fiscal framework. The core is to analyze whether fiscal rules have an asymmetric impact on discretionary measures over the cycle. First,...

In the past, economic integration in Europe was largely compatible with the persistence of different national varieties of capitalism. While product market integration intensified competition, member states could build on and foster their respective comparative advantage. To date, this no longer...

This paper provides an up-to-date overview of the gradual development of differentiated integration and the ensuing changes in the nature of European integration. It considers the dynamics of deepening and widening of the EU and proposes the metaphor of a 'European Onion' that is designed to...

There is often a gap between the prescriptions of an 'optimal' tax system and actual tax systems, some of which can be neither efficient economically nor efficient at redistributing income. With a focus on personal income taxes, this paper reviews the political economics literature on tax...

There is often a gap between the prescriptions of an "optimal" tax system and actual tax systems, some of which can be neither efficient economically nor efficient at redistributing income. With a focus on personal income taxes, this paper reviews the political economics literature on tax...

The rise of a small number of digital platform corporations as the de facto governing institutions of the Internet has generated calls from around the world for greater regulation of platform power in the public interest. Concerns have ranged from monopolistic economic power and adverse effects...

This paper surveys the theoretical and empirical research on the efficient assignment of policy tasks to different levels of government and applies the results on the delimitation of competences within the European Union. The main results are: (i) A precise derivation of an optimal degree of...

From produce to wine, we only consume things when they are ready. The courts are no different. That concept of "readiness" is how courts address cases and controversies as well. Justiciability doctrines, particularly ripeness, have a particularly important role in takings challenges to...