9. Characteristics of excluded studies – for workers.

Study	Methods	Participants	Intervention	Outcomes
Prado 2010	Before and after study	self‐employed in Colombia	launched a set of measures (decree 1703 and Law 797) aimed at enrolling the self‐employed, reducing evasion and addressing fraudulent enrolment	increased enrolment rates among the self‐employed
Thornton 2010	Before and after study	the informal sector workers, in Nicaragua	design randomly assigned individuals to treatment arms with differing prices and enrolment procedures	1) the number of sample enrolled in the insurance scheme 2) Effect of insurance: utilization and expenditures 3) Effect of insurance: family planning and other services
Frenk 2006	Post‐intervention description, and lack of control	uninsured Mexicans who are self‐employed, unemployed, or out of the work force	1) stewardship: monitoring, performance evaluation, and regulation of the entire health system 2) finance public‐health activities 3) strengthen the supply of high‐quality health services 4) improve service delivery	1) the number of insured families 2) increase Seguro Popular coverage in two dimensions: horizontal and vertical 3) Evolution of financial imbalances