https://www.imf.org/-/media/Files/Publications/DP/2021/English/EMPSOUPEA.ashx
https://www.mckinsey.com/business-functions/strategy-and-corporate-finance/our-insights/a-better-way-to-anticipate-downturns?cid=other-eml-cls-mip-mck&hlkid=43c6066168d24ce48770cda86c18e473&hctky=&hdpid=5b2ed585-5c55-4c19-a844-02c1a823aa91
https://www.bruegel.org/sites/default/files/wp_attachments/China-WP-02-050422-final.pdf
https://www.propublica.org/article/secret-irs-files-trading-competitors-stock