Transitivity of Preferences: When Doest it Matter ?

We define the empirical conditions on prices and incomes under which transitivityof preferences has specific testable implications. In particular, we set out necessaryand sufficient requirements for budget sets under which consumption choices canviolate SARP (Strong Axiom of Revealed Preferences) but not WARP (Weak Axiomof Revealed Preferences). As SARP extends WARP by additionally imposingtransitive preferences, this effectively defines the conditions under which transitivityis separately testable. Our findings have considerable practical relevance, as transitivityconditions are known to substantially aggravate the computational burden ofempirical revealed preference analysis. Our characterization takes the form of triangularconditions that must hold for all three-element subsets of normalized prices,and which are easy to verify in practice. We demonstrate their practical use throughtwo short empirical applications.