Résumé

Should agencies confine their role to their main duty or should they embrace new and desirable societal objectives? This article first discusses two emblematic examples of mission expansion: socially responsible competition authorities and green central banks. It then sheds light on the ongoing debate using contributions to bureau- cratic design in economics and political science. On that basis, it warns against the risks associated with the loss of accountability, institutional conflicts, and the lack of policy coordination.

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Codes JEL