text_combined: invoice ordered papers shirley invoice papers ordered line vince forwarded vince j kaminski hou ect 04 11 2000 01 22 pm nber working paper catalog 04 11 2000 10 09 59 vkamins enron com cc subject invoice ordered papers ordered following papers wp w 7613 foundations technical analysis computational algorithms statistical inference empirical implementation wp w 6250 pricing hedging derivative securities incomplete markets e aritrage model total cost excluding shipping us 10 shipping address ordered papers electronic delivery experienced problems downloading browse following url download paper orders url valid 7 days receive duplicate bills please send note