Oct 04 2013 Ryan W Herzog   An Analysis of Okun's Law, the Natural Rate, and Voting Preferences for the 50 States   Abstract  Contact Information  Citation  Full Text  -  Note   Aug 21 2008 Veli YILANCI   Are Unemployment Rates Nonstationary or Nonlinear? Evidence from 19 OECD Countries   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Aug 20 2007 Kevin Aretz and David Peel   Some implications of a quartic loss function   Abstract  Contact Information  Citation  Full Text  -  Note