@book{Skupnik2013, author = {Skupnik, Christoph}, year = {2013}, language = {eng}, copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen}, title = {"Welfare magnetism" in the EU-15?}, url = "http://dx.doi.org/10.17169/FUDOCS_document_000000017968", }