„A number of countries have traditional Dual Systems of apprenticeship, where provision is regulated by the social partners, and with apprentices recruited by firms and placed on employment contracts (including Austria, Belgium, Denmark, Germany, Ireland, Luxembourg, Netherlands, and Switzerland). But it is only in Austria, Germany, and Switzerland where a third or more of young people participate in them.“
Andy Green u. a., The Effects of System Type and System Characteristics on Skills Acquisition in Upper Secondary Education and Training (2021), S. 25.