Key points are not available for this paper at this time.
Donald R. Songer, Susan Haire, Integrating Alternative Approaches to the Study of Judicial Voting: Obscenity Cases in the U.S. Courts of Appeals, American Journal of Political Science, Vol. 36, No. 4 (Nov., 1992), pp. 963-982
Songer et al. (Sun,) studied this question.