The fine report by David Glenn is here. Note the ad hominem attack on Liebowitz:
In an e-mail message to The Chronicle, Mr. Strumpf defends his work and suggests that Mr. Liebowitz's zeal stems from the fact that an academic center he directs, the Center for the Analysis of Property Rights and Innovation, receives grants from the Recording Industry Association of America and other commercial interests. "One might ask why Professor Liebowitz has remained so engrossed with our study," he writes.
Or, maybe he's just upset that a 40+-page lead article in one of the profression's top journals has serious errors.