https://towardsdatascience.com/a-new-coefficient-of-correlation-64ae4f260310
https://www.brookings.edu/wp-content/uploads/2022/08/Prescription_Drug_CPI_WP.pdf
https://www.nature.com/articles/d41586-023-00978-2?utm_source=Nature+Briefing&utm_campaign=f1fe2b3b43-briefing-dy-20230414&utm_medium=email&utm_term=0_c9dfd39373-f1fe2b3b43-45594622
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef20058en.pdf