Do the Europeans have to "love" each other to collaborate? Two cross-border examples

Comparing two cross-border cases, the paper examines why, in the Perpignan case, cross-border policies are based on feelings whereas in Mulhouse case, these policies are justified by economic development or territory planning without any mention of "feelings" between European neighbours. To explain this gap, the paper analyses not only the definition of cross-border territories inserted in a complex multi-level scheme, but also the use (or not use) of feelings in political management of this territories.