calculation of individual weight with duplicate essays

From: Kai wu Date: July 15, 2008 technical Source: mail-archive.com
Dear all, I am using L2 item and between essay EPS to deal with existance of duplicate essays from some PK samples in the dataset. I am wondering how to calculate the individual weight for output IWRES. Thanks in advance. $ERROR IPRE=F BEV=ERR(1) IF (GRG.EQ.1) BEV=ERR(2) Y=F*(1+ERR(3)+BEV)+ERR(4) $SIGMA BLOCK(1) 0.01 ;Between Essay ERR(1) $SIGMA BLOCK(1) SAME $SIGMA .04 4 ;ERR(4) initialized at (LOQ/2)^2 Regards/Kai
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