Landsman, S., Diamond, S., Dimitropoulos, L., & Saks, M. J. (1998). Be careful what you wish for: The paradoxical effects of bifurcating claims for punitive damages. Wisconsin Law Review, 1998, 297-342.
No impact of trial bifurcation (liability vs. punitive) on jury verdicts; jurors hearing all evidence somewhat more likely to judge plaintiff liable, but no effect on juries. Moderate effect of case strength on jury verdicts (30% conviction rate for strong case vs. 12% for weak). Deliberation produced leniency effect. 92% of juries that judged plaintiff liable also awarded punitive damages, but punitive damage awards almost 4 x greater in bifurcated condition.