The paper presents results from various indicators on the differences in regional specialisation in the current as well as in the new member states of the European Union.
Link
http://econpapers.repec.org/scripts/redir.pl?u=http%3A%2F%2Fwww.ersa.org%2Fersaconfs%2Fersa03%2Fcdrom%2Fpapers%2F317.pdf;h=repec:wiw:wiwrsa:ersa03p317