An increasing number of member countries of the European Union (EU) is heading for ratification through referendum of the yet to be adopted constitution for Europe. Such popular votes will add an additional ratification constraint and empirical models will require information on the positions of...

The term urban sprawl is often used to describe apparent inefficiencies of spatial development, including disproportionate growth of urban areas and excessive leapfrog development. In Switzerland, where open space is a scare resource, sprawl takes place all over the country. It goes at the...