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Abstract
American politics scholarship has relied extensively on self-reported measures of ideology. We evaluate these widely used measures through an original national survey. Descriptively, we show that Americans' understandings of "liberal" and "conservative" are weakly aligned with conventional definitions of these terms and that such understandings are heterogeneous across social groups, casting doubt on the construct validity and measurement equivalence of ideological self-placements. Experimentally, we randomly assign one of three measures of ideology to each respondent: (1) the standard ANES question, (2) a version that adds definitions of "liberal" and "conservative," and (3) a version that keeps these definitions but removes ideological labels from the question. We find that the third measure, which helps to isolate symbolic ideology from operational ideology, shifts self-reported ideology in important ways: Democrats become more conservative, and Republicans more liberal. These findings offer first-cut experimental evidence on the limitations of self-reported ideology as a measure of operational ideology, and contribute to ongoing debates about the use of ideological self-placements in American politics.

AbstractWhen do people care about relative gains in trade? Much of the international relations scholarship—and much of the political rhetoric on trade—would lead us to expect support for a trade policy that benefits ourselves more than it benefits others. Yet, a large interdisciplinary literature also points to the prevalence and importance of other-regarding preferences, rendering the conventional wisdom contestable. We investigate whether and how relative gains influence trade preferences through an original survey experiment in the midst of the China–US trade war. We find that in a win-win scenario, relative gains shape trade opinion: if both sides are gaining, people want to gain more than their foreign trade partner. However, these considerations are offset in a win-lose scenario where the other side is losing out. Relative-gains considerations causally affect opinion on trade, but not in a "beggar-thy-neighbor" or even a "beggar-thy-rival" situation. These findings contribute to our understanding of the role of relative gains in international relations and provide the first experimental evidence that relative-gains considerations can be offset by other-regarding preferences in international trade.