For those interested, here is the reference information:
A Tale of Two Worlds: New U.S. Gambling Laws and the MMORPG
Gaming Law Review. Aug 2007, Vol. 11, No. 4: 436-439
Mark Methenitis. Gaming Law Review. 2007, 11(4): 436-439. doi:10.1089/glr.2007.11404.
Gaming Law Review, Volume 11, Number 4
[UPDATE: Just to clarify, the simplification was in the following regard: I assumed, for the purpose of the paper, that Blizzard's ban on real money transactions was completely effective, rather than just mostly effective. The concept of the "black market" complicated the comparison to a high degree and would have easily doubled the length of the paper. It also plays to a greater assumption that Blizzard will, in all likelyhood, continue to crack down and may eventually wholly eliminate real money transactions, even those on the "black market" type level.]