^pof;
Economics;
and;
Organization;
Science,;
Lillehammer;
University;
College,;
Lillehammer;
NO-2624,;
Norway;
^pof;
Industrial;
Economics;
and;
Technology;
Management,;
Norwegian;
University;
of;
Science;
and;
Technology,;
Trondheim;
N0-7491,;
Norway;
^pof;
Business;
Administration;
and;
Economics,;
Molde;
University;
College,;
Molde;
NO-6402,;
Norway;