Historical Consensual Norms in the High Court

Abstract

There is a substantial political-science literature that discusses the notion of consensual norms in the US Supreme Court. Most of this literature assumes that consensual norms exist, rather than proving their existence. Caldeira and Zorn ( American Journal of Political Science 42: 874-902, 1998) use the method of cointegration developed in econometric time-series analysis to prove the existence of a single consensual norm in the US Supreme Court. This study applies cointegration analysis to historical time-series data on dissenting and single judgments to examine whether there is a single consensual norm in the High Court of Australia. The study finds that a single consensual norm does not underlie decision making in the High Court. This result is explained on the basis that the institutions underpinning decision making and the approach to decision making are different between the Australian High Court and the US Supreme Court.