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The Joint Research Centre (JRC) is the European Commission's science and knowledge service which employs scientists to carry out research in order to provide independent scientific advice and support to EU policy.
The Transatlantic Trade and Investment Partnership (TTIP) generated an unprecedented contestation across Europe. In this paper, we focus on the sources of such backlash and analyze opinions on free trade and the specific agreement. Not accounting for the fact that these preferences are correlated could lead to biased conclusions about their determinants. To remediate this, we construct a set of bivariate probit models and calculate joint probabilities for the different types of preference configurations. We validate that support for free trade and support for the TTIP have similar, but not identical foundations. Inconsistent preferences are rooted in individual values, EU attitudes, and political cues, as well as treaty partner heuristics. Our innovative empirical approach offers an improved understanding of trade attitudes within EU’s multilevel context.