The report contributes in four ways to the global debate on the transition from the informal to the formal economy: 1) by examining the multiple faces of informality in a large sample of countries representing diverse conditions, locations and stages of development; 2) by presenting new empirical evidence on the links between informality and the development process; 3) by assessing risks and vulnerabilities in the informal economy, such as poverty and occupational risks, which can be mitigated with social protection and appropriate risk management instruments; 4) by showing that the transition to formality is a complex issue that touches on a wide range of policy domains.