
https://www.progressivepolicy.org/blogs/ppis-trade-fact-of-the-week-military-spending-was-2-3-of-world-gdp-last-year/

https://assets.nationbuilder.com/cdfai/pages/4139/attachments/original/1552434022/Unblocking_the_Bottlenecks_and_Making_the_Global_Supply_Chain_Transparent_How_blockchain_technology_can_update_global_trade.pdf?1552434022

https://economiesuisse.ch/de/artikel/schuldenbremse-so-gut-wie-vor-20-jahren-und-genauso-wichtig