Received 28 December 1997; accepted 29 September 1999.
Thanks to the interviewees for taking the time to talk with us. A
special thank you to Anna K. Y. Lin from the Hong Kong Article Numbering
Association, Joseph Yap from the Retail Management Association
Ltd., Erland Nielsen from EAN Denmark, and Martti Lahti from
the Finnish Data Communication Association. Also thanks to the three
anonymous reviewers, our associate editor, Pertti Jarvinen, and Rob
Kling for constructive comments on an earlier version of this article.
Address correspondence to Jan Damsgaard, Department of Computer
Science, Aalborg University, Fr. Bajersvej 7E, DK-990 Aalborg
Ø, Denmark. E-mail: damse@cs.auc.dk