“…Following de Groot et al (2020), the standard unit we used was Int.$2020 (USD adjusted for differences in purchasing power across countries), per hectare, and per year for the total number of beneficiaries. We applied a five-step standardization process: price level, currency, spatial unit, temporal unit, beneficiary unit, suggested by De Groot et al (2020) and Ruiz-Agudelo et al (2022). Finally, essential information was recorded from each study, including publication descriptors and geographic information (Supplementary material 1).…”