| prof. dr. Ruud H. Koning Dept. Economics & Econometrics Faculty of Economics and Business University of Groningen PO Box 800 9700 AV Groningen The Netherlands |
tel: (+31) (0)50 3637192 or 3637018 tel: (+31) (0)62 2246 443 fax: (+31) (0)50 363 3720 email: r.h.koning@rug.nl |