[1] Univ London Imperial Coll Sci Technol & Med, Sch Business, London SW7 2AZ, England
[2] Kozminski Univ, Accounting Dept, Warsaw, Poland
[3] Polish Acad Sci INE PAN, Inst Econ, Warsaw, Poland
[4] Warsaw Sch Econ SGH, World Econ Res Inst, Warsaw, Poland
[5] Vrije Univ Amsterdam, Amsterdam, Netherlands
[6] Duisenberg Sch Finance, Amsterdam, Netherlands