The Weak Axiom of Revealed Preference for Collective Households

The purpose of this paper is to derive extensions of the weak axiom of revealed preference (warp) to collective households. We consider three different settings: the general setting, where no information on the characteristics of goods is available; the private setting, where all goods are consumed privately without externalities, and finally, the dictator setting, where each observation is fully assigned to a single member of the household. For each of the above settings, we propose an extension of warp and we establish the complexity of testing that extension.