While the potential for intellectual property rights to inhibit the diffusion of scientific knowledge is at the heart of several contemporary policy debates, evidence for the "anti-commons effect" has been anecdotal. A central issue in this debate is how intellectual property rights over a given...

While the potential for intellectual property rights to inhibit the diffusion of scientific knowledge is at the heart of several contemporary policy debates, evidence for the %u201Canti-commons effect%u201D has been anecdotal. A central issue in this debate is how intellectual property rights...