Cai, Yixia, and Martin Evans. “Informal Transfers in Comparisons of Income Distributions: Lessons from Rich and Middle-Income Countries”. Journal of Income Distribution® 27, no. 2 (May 15, 2018): 1–20. Accessed April 26, 2024. https://jid.journals.yorku.ca/index.php/jid/article/view/40349.