Good work, Productivity. I think the two unknowns on your graph (Geoffrey_S and I) are both Euros.

I wonder what is the mean difference in the horizontal and vertical axes between the Euros and the Yanks? The graph makes it look like the big difference economic, but the Euros are also lower on the social scale.

...whilst you Europeans are all clustered in the bottom left quadrant.
True, but none of European "rightwinger" I know have taken the test yet.