Just playing around with the MIT’s Pantheon and the Development Economics (click on it to enlarge the plot).

Well, I know correlation is not the end of the (hi)story. Maybe it’s just the starting point. The “lpib2000” is the log of the GDP in 2000 (used in several papers, I know) and the “panteon_rank” is just as it says.
So, if you think this is interesting, well, you saw it first here. ^_ ^
Click to enlarge isn’t working for me. Nice link though.