Political psychologists have been quick to use prospect theory in their work, realizing its potential for explaining decisions under risk. Applying prospect theory to political decision-making is not without problems, though, and here we address two of these: (1) Does prospect theory actually apply to political decision-makers, or are politicians unlike the rest of us? (2) Which dimension do politicians use as their reference point when there are multiple dimensions (e.g., votes and policy)? We address both problems in an experiment with a unique sample of Dutch members of parliament as participants. We use well-known (incentivized) decision situations and newly developed hypothetical political decision-making scenarios. Our results indicate that politicians' deviate from expected utility theory in the direction predicted by prospect theory but that these deviations are somewhat smaller than those of other people. Votes appear to be a more important determinant of politicians' reference point than is policy.KEY WORDS: prospect theory, reflection effect, probability weighting, politicians, experiment, elite decision-making Over the past decades, psychologists and behavioral economists have produced an extensive body of research demonstrating that people deviate systematically from the predictions of expected utility theory by falling prey to decision-making biases (see, e.g., Camerer, 2003;Starmer, 2000). These findings are relevant for political scientists, since expected utility theory is the basis of rational choice-still a, or even the, dominant approach in many fields of political science (e.g., Bueno de Mesquita, 1981;Mearsheimer, 2001; for a recent discussion on the usefulness of rational choice theory, see Hug, 2014).Two of the most prominent deviations from expected utility theory are probability weighting and the reflection effect (Tversky & Kahneman, 1981). Probability weighting implies that people do not treat probabilities linearly and are very sensitive to the possibility of ensuring a sure outcome. The reflection effect means that peoples' risk attitudes are influenced by whether outcomes are framed as gains or losses: for losses they are generally risk taking, but for gains they are risk averse. Prospect theory (Kahneman & Tversky, 1979;Tversky & Kahneman, 1992) is a theory of decision-making under risk and uncertainty that incorporates the body of research demonstrating deviations from expected utility theory. The choice regularities incorporated in prospect theory have been confirmed 350 Main Street, Malden, MA 02148, USA, 9600 Garsington Road, Oxford, OX4 2DQ, and PO Box 378 Carlton South, 3053 Victoria, Australia This is an open access article under the terms of the Creative Commons Attribution NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.Political Psychology, Vol. 38, No. 1, 2017 doi: 10.1111 bs_bs_banner by numerous studies (Starmer, 2000), mostly using student samp...