Which one of the following, if true, would have most strengthened the publishers' position in this case?

Emil-Kunkin on April 8 at 02:33AM

One of the factors determine if the copying was allowable at line 27 was if the copying has an effect on the market value of the work. If the copy shops copying of course packs was shown to lead to a decrease in sales for the materials in question, this would show a decline in the market value of the work.