Nov 20 2015 Kristen Monaco and Steven Yamarik   Are there human capital externalities in U.S. states? Evidence from the Current Population Survey   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Jul 31 2015 Erich Gundlach and Rasmus Thönnessen   A note on human capital externalities, factor substitution, and technology differences   Abstract  Contact Information  Citation  Full Text  -  Note