Hyperinflation in Venezuela

Thanks to Bloomberg
https://www.bloomberg.com/news/articles/2018-08-10/venezuelan-hyperinflation-makes-a-fast-food-meal-a-nightmare

Technological advance in the shipping industry

Thanks to the BBC
https://www.bbc.co.uk/news/av/stories-46540862/smart-ships-using-the-wind-and-air-bubbles-to-save-fuel

Contestable markets

Thanks to econfix
http://blog.elearneconomics.com/a2-economics-the-need-to-move-to-more-contestable-markets/

PPP GDP by country over time

I find this mesmerising
http://blog.elearneconomics.com/top-20-country-gdp-ppp-ranking-history-1980-2023-dynamic-graphic/