Digital transformation in the informal economy : opportunities and challenges for technical and vocational education and training in development cooperation / published by: giz, Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH ; author: Léna Krichewsky-Wegener ; responsible/editing: Julia Schmidt, Fabian Jacobs, Ute Jaskolski-Thiart ; on behalf of German Federal Ministry for Economic Cooperation and Development (BMZ) Division 413 Education, Bonn