In this episode, Alex gives a mini lesson on the economics of purchasing price parity (PPP) and how it is a useful (albeit imperfect) tool to compare the economics, GDP, and currency values of different countries. He uses the example of the Economist's "Big Mac Index" and talks about how Trump's tariffs are not doing what he promised they would do. Confidence in the US dollar is dropping and it is reflective in the price of Big Macs.