[meyer]

Actually, what Murray and Hernstien said about IQs in urban areas is that they are higher than in less densely populated areas, not lower.

I think that this is very dependent on ones' definition of "urban area". Do you mean the deep inner city, the city and surrounding suburbs, large cities like New York, or medium-sized cities like Cleveland or Nashville? There are some enormous differences in the demographics that occur with these different characteristics.