Comments on the Presentation by Professor John A. Usher, titled ‘Proportionality in the Context of Economic and Monetary Union’ - Legal Issues of Economic Integration View Comments on the Presentation by Professor John A. Usher, titled ‘Proportionality in the Context of Economic and Monetary Union’ by Carel van den Berg - Legal Issues of Economic Integration Comments on the Presentation by Professor John A. Usher, titled ‘Proportionality in the Context of Economic and Monetary Union’ Carel van den Berg 35 3 Legal Issues of Economic Integration