Using the 2016 merger of French regions as a natural experiment, this paper adopts a difference-in-differences identification strategy to recover its causal impact on individual subjective well-being. No depressing effect is found in the short term; life satisfaction has even increased in regions that were absorbed from both economic and political viewpoints. The empirical evidence at stake suggests that local economic performance has enhanced in these regions, which includes a faster decline of the unemployment rate. In the context of a unitary state, economic gains have therefore outweighed cultural attachment to administrative regions.