Unraveling the Choice Format Effect: A Context-Dependent Random Utility Model
A few recent studies report that preferences elicited from a two-alternative choice format are different from those elicited from a three-alternative choice format, when both choice set designs contain a status quo option. We hypothesize that the choice format effect might disappear when we estimate a random utility model (RUM) that allows for context-dependent preferences. Based on the estimated context-dependent RUM, we find that the choice format effect is likely the result of two offsetting effects: a task complexity effect that increases the probability of choosing the status quo option, and a preference matching effect, which decreases the probability.
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- Amos Tversky & Daniel Kahneman, 1991. "Loss Aversion in Riskless Choice: A Reference-Dependent Model," The Quarterly Journal of Economics, Oxford University Press, vol. 106(4), pages 1039-1061.
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