Very interesting. Here is a link that explains the PPP measure in greater detail. <a href="https://www.investopedia.com/updates/purchasing-power-parity-ppp/" rel="nofollow">https://www.investopedia.com/updates/purchasing-power-parity...</a><p>Actually the big mac index is a kind of PPP like measure.<p>I thought it was a stretch to compare the economy of Russia and Germany, however it seems to make sense, as the PPP per capita of Germany vs Russia is 54076$ vs 27903$ while the population is 83 million vs 144 million.<p>Other interesting details:<p>The GDP per capita of Russia vs Ukraine is 10125$ vs 3726$ (ratio of 2.7)<p>The PPP per capita of Russia vs Ukraine is 27903$ vs 13110$ dollars (ratio of 2.12)