version 11 set more on log using 11.11.Isoproterenol.log, replace * 11.11.Isoproterenol.log * * Perform a GEE analyses of the effect of race and dose of isoproterenol * on blood flow using the data of Lang et al. (1995). * use C:\wddtext\11.2.Long.Isoproterenol.dta ,clear drop if dose==0 | id==8 generate white = race==1 * * Analyze data using classification variables with interaction * xtgee delta_fbf dose##white, i(id) robust lincom _cons + 1.white lincom _cons+ 20.dose lincom _cons+ 20.dose + 1.white + 20.dose#1.white lincom 1.white + 20.dose#1.white lincom _cons+ 60.dose lincom _cons+ 60.dose + 1.white + 60.dose#1.white lincom 1.white + 60.dose#1.white lincom _cons+ 150.dose lincom _cons+ 150.dose + 1.white + 150.dose#1.white lincom 1.white + 150.dose#1.white lincom _cons+ 300.dose lincom _cons+ 300.dose + 1.white + 300.dose#1.white lincom 1.white + 300.dose#1.white lincom _cons+ 400.dose lincom _cons+ 400.dose + 1.white + 400.dose#1.white lincom 1.white + 400.dose#1.white test 20.dose#1.white 60.dose#1.white 150.dose#1.white 300.dose#1.white 400.dose#1.white log close