I provide a simple example of a single peaked utility function that generates a Giffen demand. The utility function is smooth, non piecewise defined, strictly concave but not globally increasing. A full characterization of the parameter conditions under which the Giffen demand arises is...

We solve Ireland's (1994) conspicuous consumption model (where social-status concerns are introduced into the utility function) for Cobb-Douglas (CD) utility. In the resulting generalized CD consumer model, Engel curves are no longer limited to linearity. In the homothetic CD case, total...

How far can we go in weakening the assumptions of the general equilibrium model? Existence of equilibrium, structural stability and finiteness of equilibria of regular economies, genericity of regular economies and an index formula for the equilibria of regular economies have been known not to...

By taking sets of utility functions as a primitive description of agents, we define an ordering over assumptions on utility functions that gauges their implicit measurement requirements. Cardinal and ordinal assumptions constitute two types of measurement requirements, but several standard...

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...

This paper proposes a tractable alternative to Cobb-Douglas utility to resolve the problems of lack of reservation price and income effects in demand functions derived from Cobb-Douglas utility or quasilinear utility. Another advantage of this alternative is that it provides a closed-form...

This paper proves that the model by Grossman and Helpman (1994) produces another singular indifference curve, which can never have any tangency with a standard budget line. Such indifference curve means that the person extremely loves money, and his utility function can be reduced to one...

This paper uses the 2016 book by Chambers and Echenique as the focal point for a general discussion of the revealed preference literature: starting with Samuelson (1938) but with a particular emphasis on its relationship to general equilibrium theory and recent empirical applications. The main...

In this paper we are concerned with the following question. Given an extended preference ordering under what conditions does there exist an empirical stochastic/social choice function which generates it? We use Farkas' lemma to obtain a necessary and sufficient condition under which such a...