GDPoweR is a collaborative research project on industrial relations in the platform economy, involving seven organizations from five countries (Austria, Belgium, France, Poland, Spain). It focuses on two sectors - ride-hailing and food delivery - and explores what worker data is collected by platform companies and how this affects workers, what strategies are used by social partners to negotiate and implement collective agreement and how the implementation of such agreements can be monitored and enforced. A central method used is the recovery of worker data through GDPR requests and the joint analysis of this data by workers and researchers.