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Hi
Kindly let me know if you have this article . Thx!!!!
Parities and Spread Trading in Gold and Silver Markets: A Fractional Cointegration Analysis
Shi-Miin Liua & Chih-Hsien Chou
http://www.scribd.com/doc/37632705/Parities-and-Spread-Trading-in-Gold-and-Silver-Marketss