Drawing on a new analytical framework provided by the economic theory of optimal legal areas, this paper identifies the factors determining the optimal size of the European Union. It applies this theory to the question of how enlargement affects the welfare of the current and the new members of...

Ius Commune describes the spontaneous development of a european contract law by adaptive behavior of contracting parties to competing law systems and their interpretations by jursidiction. The idea of spontaneous law harmonization is appealing, since its result is independent of centraized...