This work consists of two parts: First, it is shown that for a two-dimensional commodity space any homothetic utility function that rationalizes each pair of observations in a set of consumption data also rationalizes the entire set of observations. The result is stated as a pairwise version of...

We provide two new, simple proofs of Afriat's celebrated theorem stating that a finite set of price-quantity observations is consistent with utility maximization if, and only if, the observations satisfy a variation of the Strong Axiom of Revealed Preference known as the Generalized Axiom of...

Consider an experiment in which subjects are asked to choose between pairs consisting of a monetary payment and a time-delay at which the payment is delivered. Given a finite set of observations, under what conditions the choices of an individual agent can be rationalised by a discounted utility...

The authors study the lack of necessity of the transitivity property when representing preference relations. Avoiding transitivity hypothesis, this work offers a vision about the modeling of consumer preference relations which are different from the classic one used in economics pedagogy. The...

I propose a novel nonparametric method to empirically identify the degree of heterogeneity in individual preferences. Using preference information revealed by the observed behaviour, the method estimates interpersonal preference heterogeneity as the Kemeny distance between individual rankings...

The impact that the retail format has on the level of individual motivation tends to be overlooked in discussions of the determinants of organic consumption, this neglect due to the tendency to model individual and contextual factors separately. Hence, the dominant research paradigm has...

We prove that a preference relation which is continuous on every straight line has a utility representation if its domain is a convex subset of a finite dimensional vector space. Our condition on the domain of a preference relation is stronger than Eilenberg (1941) and Debreu (1959, 1964), but...

Revealed preference restrictions are increasingly used to bound demand responses and as shape restrictions in nonparametric estimation exercises. However, the restrictions imposed are not sufficient for rationality when predictions are made at more than a single price regime. We highlight the...

We derive necessary and sufficient conditions for a finite data set of price and demand observations to be consistent with an additively separable preference. We do so without imposing concavity on any of the subutility functions or convexity of the budget set a priori, thereby generalizing...