https://www.dailymaverick.co.za/article/2023-10-12-how-much-can-we-rely-on-census-2022/
https://publications.parliament.uk/pa/cm201719/cmselect/cmcumeds/1791/1791.pdf
https://www.barmer.de/resource/blob/1485604/3f241665fbe6e12f9ad57bd59c4f8222/sinus-studie-jugendbericht-2025-2026-kapitel-zukunftsoptimismus-data.pdf
https://www.nber.org/system/files/working_papers/w32002/w32002.pdf