Columbia subject headings:
European Union countries--Politics and government--21st century.
European Union--Forecasting.
European Union--Membership.
Harvard subject headings:
European Union countries--Foreign relations.
European Union countries--Politics and government.
European Union countries--Social policy.
European Union--Forecasting.
European Union--Membership.
Political culture--European Union countries.
Princeton subject headings:
European Union countries--Politics and government--21st century.
European Union--Forecasting.
European Union--Membership.