Table 1.

Summary of inclusion criteria

Characteristics	Inclusion criteria
Population	Populations living in or near forests, wetlands, grasslands, mangroves and farmland areas in countries classified by the World Bank as low‐or‐middle income
Interventions	Payments for environmental services programmes
Comparisons	Comparison group that receives no intervention (including wait‐list comparisons), business as usual or a different environmental intervention
Outcomes	Intermediate, environmental and socioeconomic outcomes
Study design	To answer question 1, experimental and quasiexperimental studies
	To answer questions 2 and 3, qualitative studies, descriptive quantitative studies, process evaluations, project documents
Other	No inclusion restrictions by publication status or language