Varian (1988) showed that the utility maximization hypothesis cannot be falsified when only a subset of goods is observed. We show that this result does not hold under the assumptions that unobserved prices and expenditures remain constant. These assumptions are naturally satisfied in laboratory...

We present clean experimental evidence that a methodological confound was introduced by Andreoni and Miller (2002) that leads to diametrically opposed conclusions regarding comparisons of preferences between categories of fellow human beings distinguished by gender or age. Our study is a warning...

Experimental subjects often do not appear to behave as selfish money-maximizers, especially when "fair" or "altruistic" motives are inconsistent with money-maximizing Nash equilibria. This paper asks whether this apparently unselfish behavior is consistent with some well-behaved preference...