*2.1. Data Collection*

Following the launch of the YWI, the Rockefeller Foundation contracted Technoserve Kenya for implementation of the mango value chain study, whereby they conducted in-person surveys and collected field data from participating farmers and other value chain actors between June and July 2018 (The authors of this paper were neither involved in the survey design nor the data collection process.). Technoserve collected data from 920 SHF (*row entries*) who provided answers based on September 2017 to March 2018 mango harvesting season. For each respondent farmer, there were 697 recorded variables (*column entries*) grouped into 12 sections, including geography and socio-demographics, farm demographics, inputs and input costs, labor costs, production, production and PHL practices, harvesting, sales, grading and storage, training, top five sources of household income, and credit access. Finally, the YWI was performed in a quasi-experimental design. Its interventions were not randomly assigned to farmers, and farmers who benefited from the interventions were not randomly selected.
