AIDS mortality may have contributed to the decline in Syphilis Rates in the United States in the 1990's2003
Teen drinking and educational attainment: Evidence from Two-Sample Instrumental Variables (TSIV) estimates2003
March 18, 2014.
March 04, 2014.
January 08, 2014.
December 17, 2013.
October 31, 2013. Taking Note - Thoughts on education from John Merrow