This period witnessed a gradual revival of the cartels, consisting of groupings of the biggest German companies that sought, through the use of single sales agencies, to control the domestic market and undermine competition. ###>Ainsi en 1947, le Danemark, la Suède, la Norvège et l'Islande, conscients de l'étroitesse de leur marché domestique, envisagent-ils la mise en place d'une union douanière scandinave.