Earlier quoted context omitted.
> And at this point Germany has seen net zero per capita economic expansion for coming up on 30 years. What exactly do you mean by "net zero per capita economic expansion"? According to the World Bank https://data.worldbank.org/indicator/NY.GDP.PCAP.PP.KD?locat... , German GDP per capita was $38,294 in 1991 (adjusting for purchasing power and inflation) and $52,931 in 2021, which looks more like 38% expansion to me.
Germany GDP per capita 1992: $26,000 Germany GDP per capita 2022 (IMF estimate): $51,000 BLS inflation adjustment calculator: $26,000 in 1992 = $55,000 in 2022. Germany has seen a net per capita contraction over 30 years. Germany's GDP per capita was not $38,000 in 1991. It was $46,000 in 2019 for reference. That 1991 $38k figure is drastically higher than the US figure was at the time. Their GDP per capita hasn't be…
Comparing separate European countries individually in general is difficult, wealth and productivity is redistributed within the EU by various means. An hierarchical model that takes all EU countries into account might be the most sensible approach.