The Economist needs to read up a bit. There is strong support for lead as the primary determinant, and not just correlation. http://www.motherjones.com/enviro

The Economist needs to read up a bit. There is strong support for lead as the primary determinant, and not just correlation. http://www.motherjones.com/environment/2013/01/lead-crime-link-gasoline http://www.motherjones.com/environment/2013/01/lead-crime-li...