Are Valuations from Nonhypothetical Choice Experiments Different from Those of Experimental Auctions?

Due to the importance of comparability and external validity of results, nonhypothetical experimental methods are increasingly used to elicit consumers' willingness to pay for various goods. Two of the increasingly popular preference elicitation methods are the nonhypothetical choice experiments and experimental auctions. We conduct experiments to compare willingness to pay estimates elicited from both methods. Our results generally suggest that valuations elicited from experimental auctions can differ from those obtained from nonhypothetical choice experiments.