Willamette Week’s Murmers this week (5/21/08) notes a recent study (May 2008) titled, “Which States Have the Best (and worst) High Courts,” by Stephen J. Choi, Mitu Gulati, and Eric A. Posner.
The WW Murmur links to the report and the official link is from the University of Chicago Law School, Olin Working Paper #405 or Public Law and Legal Theory working paper series #217.