Learning for platform-based gig work: exploring the value of micro and digital credentials / authored by Skills Group and commissioned by Sector Project Technical Vocational Educational and Training and Gig Economy Initiative of Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH ; published by: giz, Deutsche Gesellschaft für Internationale Zusammenarbeit (GIZ) GmbH ; authors: Stuart Martin, Skills Consulting Group, Pooja Gianchandani, GIZ