 The close connections between preference axioms and choice axioms can also be employed to construct a preference ordering from a choice function that satisfies certain axioms. In economics, the revealed preference approach has been used to define preference in terms of choice. Historically, this approach developed out of the pursuit of behaviouristic foundations for economic theories—i.e. the attempt to eliminate the preference framework altogether. Today, it serves to derive preference orderings from an agent’s observed choices, and to test the empirical validity of the preference axioms by testing for the violation of choice axioms (Grüne-Yanoff 2004).