>So we may have the opportunity to witness both environments over the
>next few decades, and it will be interesting to see whether there is
>any impact on the rate of production of intellectual property.
You could also argue that copyright results in excessive overproduction of intellectual property; we may have more production today than ever before, but we certainly have more production of utter crap today than ever before. Without copyright we'd probably lose a lot of that production... but I strongly suspect we'd lose far more of the crap than the worthwhile material.