Earlier quoted context omitted.
> The result is 0.82, which indicates a strong positive correlation. datamash gave me 0.52 for Pearson. Which is "eh, maybe".
That's weird, are you looking only at the top 10 countries? I've reproduced dwaltrib's results using World Bank data on 251 countries, and I get a Pearson's r of 0.82 and a p value of 5.6e-61 (!). I.e. a strong correlation, with high confidence. It makes sense too -- larger countries generally have more people, and more people generally generate more economic activity. Code if you want to try yourself: import pandas…
Thanks for double checking. I ran out of steam on the convo heh.