> Building fighter jets is cheaper in low-PPP countries, but only partially.
Even that holds only true if all other things are equal. But low PPP countries are strongly correlated with less industrialization, less educated workforce etc. That's why most (low-PPP) countries, even large ones, don't produce their own jets - it's cheaper to buy them.
> Most of that is in trade currency, so no PPP adjustment.
It's non-trivial to make that cut. I'd say things PPP for stuff like food doesn't count, but PPP for even rather basic industrial products already does.
