[1] Vrije Univ Amsterdam, Dept Hlth Sci, Amsterdam, Netherlands
[2] Austrian Inst Econ Res WIFO, Vienna, Austria
[3] Mendel Univ Brno, Dept Econ, Brno, Austria
[4] Charles Univ Prague, Fac Law, Dept Econ, Nam Currieovych 7, Prague 11640, Czech Republic
[5] Czech Acad Sci, Inst Sociol, Prague, Czech Republic