Where does preference collide?

In economics, revealed preference infers what a consumer prefers from the choices they actually make under given prices and income, rather than from what they say. Samuelson's 1938 A note on the pure theory of consumer's behaviour introduced the idea that if a bundle is chosen when another affordable bundle was also available, the chosen bundle is revealed preferred, and rebuilt consumer theory on that observable relation. The referent here is a relation recovered from real market choices, not a relation assumed on paper, a living thing's use of resources relative to what is available, or a payment that unfairly favors one creditor.[1]

Unit

A revealed-preferred relation between two chosen bundles

Recovery means

Not applicable

Measured by

Recovered from choices observed across price and income situations, and tested by consistency axioms such as WARP and SARP

In decision theory and mathematics, a preference relation is a binary ordering placed over a set of alternatives, written as one option being weakly preferred to another, and constrained by axioms such as completeness and transitivity so that rational choice can be represented numerically. Von Neumann and Morgenstern's 1944 Theory of games and economic behavior axiomatized preferences over risky prospects, and Debreu's 1954 Representation of a preference ordering by a numerical function gave conditions under which such an ordering is captured by a continuous utility function. The referent is an abstract relation assumed and studied for its formal properties, not one recovered from real purchases, an animal's use of habitat, or a creditor payment set aside in bankruptcy.[2][3]

Unit

A binary order relation over a set of alternatives

Recovery means

Not applicable

Measured by

Specified by axioms such as completeness, transitivity, and continuity, and represented by a utility function when they hold

In ecology, preference is the use of a food type or habitat out of proportion to how available it is, so a resource used more than its abundance would predict is preferred. Ivlev's 1961 Experimental ecology of the feeding of fishes introduced an electivity index comparing what an animal eats against what is present, and Johnson's 1980 The comparison of usage and availability measurements for evaluating resource preference formalized ranking habitats by usage against availability. The referent is a selection pattern measured against a baseline of what the environment offers, not a relation inferred from market choices, an axiomatized ordering, or a preferential payment in insolvency.[4][5]

Unit

Use of a resource type relative to its availability

Recovery means

Not applicable

Measured by

Quantified by electivity or selection indices comparing used against available resources

In bankruptcy law, a preference is a transfer or payment made by an insolvent debtor shortly before bankruptcy that leaves one creditor better off than others of the same class, and it can be set aside so the recovered value is shared fairly. In United States law this is governed by section 547 of the Bankruptcy Code, and in the United Kingdom by section 239 of the Insolvency Act 1986; both let a trustee or liquidator recover such transfers made within a defined window before filing. The referent is a specific pre-bankruptcy payment that the law can reverse, not a relation read from a consumer's choices, a formal ordering over options, or an animal's use of habitat.[6][7]

Unit

A single pre-bankruptcy transfer favoring one creditor

Recovery means

The transferred value can be clawed back into the estate for distribution

Measured by

Identified by insolvency at the time of transfer, a defined look-back window, and better-than-pro-rata treatment of the creditor