Under the Weather: Health, Schooling, and Economic Consequences of Early-Life Rainfall is a recent offering from the National Bureau of Economics Research.
Who would have thought that the rainfall in your birth-year and birth-location determines (inter alia) your lung capacity, height, final education level, etc? Of course, there is the big caveat that this only holds for women born in rural Indonesia between 1953 and 1974. Regardless, it’s now empirical fact and ready to guide public policy — you understand, the rainfall gap and all.
The best I can assume is that authors Sharon L. Maccini and Dean Yang found the only remaining data sets that had not yet been correlated and had at it. Or, maybe they simply had government grant dollars to consume. Either way, their main contribution is additional proof that empiricism is nonsense.