Interesting article - tried to find the source publication, but couldn't.
Not sure what I think of this but thought I'd share. I'd like to get my hands on the publication.
Found it: http://spq.sagepub.com/cgi/rapidpdf/0190272510361602v1
Not sure if you can only open it with permissions (I have academic access to most journals). Is there a way to post documents here?