%0 Generic %T The Effects of Lead Exposure on Violent Crime: Evidence from U.S. Cities in the Early Twentieth Century %A Feigenbaum, James J. %A Muller, Christopher %D 2014 %U https://pdfs.semanticscholar.org/6fc2/f1b2732e327f4737fcce7b7c1ea5bea81a0d.pdf