SUBJECT: Resistant smoothing using Stata AUTHORS: Isaias H. Salgado-Ugarte, Biologia, E.N.E.P. Zaragoza, U.N.A.M. Mexico City, Mexico Fax 011-525-744-1217 Jaime Curts Garcia, Dir. Gral. de Planeacion, Evaluacion y Proyectos Academicos, U.N.A.M., Mexico City, Mexico. SUPPORT: None COMMENTS: Use standard in1 installation instructions. From inside Stata, on-line help is available. Type 'help sm4253eh'. The data set used in sed7 can be found in the dta subdirectory; copy to any temporary directiry if you wish.