This project for WHO aimed to support government officials, typically but not only from the Ministry of Health, to more effectively use formal agreements to manage international health worker mobility. The Innovation Insights team: (1) Analyzed the content and form of scores of bilateral and regional health worker mobility agreements, (2) Conducted more than 30 stakeholder interviews to shed further light on these agreements and their negotiation/execution, and (3) Carried out a comprehensive literature review about the impact of health worker mobility agreements in the real economy/healthcare systems. This work informed WHO guidance for Member States.