Voting on a Trade Agreement: Firm Networks and Attitudes Toward Openness

We exploit a natural experiment to study the extent to which popular attitudes toward trade are driven by economic fundamentals. In 2007, Costa Rica put a free trade agreement (FTA) to a national referendum. With a single question on the ballot, 59% of Costa Rican adult citizens cast a vote on whether they wanted an FTA with the United States to be ratified, or not. We merge disaggregated referendum results, which break new ground on anonymity-compatible voting data, with employer-employee, customs, and firm-to-firm transactions data, and data on household composition and expenditures. We document that a firm’s exposure to the FTA, directly and via input-output linkages, significantly influences the voting behavior of its employees. This effect dominates that of sector-level exposure and is greater for voters aligned with pro-FTA political candidates. We also show that citizens considered the expected decrease in consumer prices when exercising their vote. Overall, economic factors explain 6% of the variation in voting patterns which cannot be accounted for by non-economic factors such as political ideology, and played a pivotal role in this vote.