Do Pregnant Smokers Cause Future Crime?

Fewer pregnant women now smoke than in the past.  What role has this fact played in recent crime declines?  Here is a cross post I wrote for the "Same Facts" blog.   In the clash of the titans, we now have "lead", "abortion" and "smoking" all dueling it out.  Note that 2 of these 3 are "environmental factors".   If environmental economists can now claim both climate change and urban crime as our domain then our future is quite bright!