Jun 10 2012 Robert Czudaj and Joscha Beckmann   Spot and futures commodity markets and the unbiasedness hypothesis - evidence from a novel panel unit root test   Abstract  Contact Information  Citation  Full Text  -  Preliminary Result   Jul 13 2010 Yoichi Tsuchiya   Linkages among precious metals commodity futures prices: evidence from Tokyo   Abstract  Contact Information  Citation  Full Text  -  Note