This paper contributes to the elicitation of a decision maker's strict preferences and their possible indifference or incomparability/indecisiveness. Every subject in both treatments of an incentivized lab experiment could choose multiple alternatives from each of the 50 distinct menus of...

We report on two novel choice experiments with real goods where subjects in one treatment are forced to choose, as is the norm in economic experiments, while in the other they are not but can instead incur a small cost to defer choice. Using a variety of measures, we find that the active choices...