Citations Redux

A year ago I made a post about a well-reproduced statistic on number of dirtiest cities in China and how it was wrong. Well, tonight my dinner reading was from this month's Foreign Affairs, a fairly respectable journal, and lo and behold, in the middle of the article about "China's Coming Environmental Crash" by Elizabeth Economy (great last name), there was the 16 of the world's 20 dirtiest cities statistic again. No citation at all, because this is, of course, common wisdom. I think I may write a letter to the editor. Or Elizabeth Economy. Or both...