This article considers several possible determinants of the transmission of legal precedent across Australian state supreme courts over the course of the twentieth century. The study finds that that the transmission of legal precedent is higher between State supreme courts that are more physically proximate and between state supreme courts in which a majority of judges in both courts are appointed by conservative governments. The study further finds that having an intermediate trial court and providing appointments to the High Court of Australia are correlated with whether a state is a source of interstate citations or a cue sender.