http://www.berkshirehathaway.com/letters/2017ltr.pdf
https://www.nber.org/system/files/working_papers/w27488/w27488.pdf
https://www.lse.ac.uk/granthaminstitute/wp-content/uploads/2023/06/INSPIRE-Sustainable-Central-Banking-Toolbox-Policy-Briefing-12.pdf
https://www.sipri.org/sites/default/files/2026-03/fs_2603_at_2025.pdf