Borders are crucial for peace deals yet understanding public opinion is tough. To address this challenge, we conducted a conjoint survey experiment on post-Brexit border preferences in Northern Ireland.

* Method: Conjoint Experiment Using Traditional Surveys

* We mapped areas of convergence and divergence between unionist and nationalist communities regarding post-Brexit borders.

* Our findings reveal surprising overlap in utility functions despite political differences.

* Brexit simulations show potential for compromise on border arrangements between the two groups.

This empirical approach offers a way to understand support for similar institutional solutions across other divided societies.