Dear Professor Gary King: I am using your AMELIA program for a sample drawn from NELS:88 (National Education Longitudinal Study of 1988, administered by the U.S. Department of Education, National Center of Education Statistics). The NELS:88 is based on a two stage, stratified sample design, with schools as the first-stage unit and students within schools as the second-stage unit. Because of the sampling design, I must use a statistical program that calculates standard errors by taking into account the complex sample design. So, I can't use STATA because it does not correct for complex sample designs. Instead, I am using AM, a program designed by the American Institutes for Research (http://am.air.org). I want to create one file in SPSS that contains all five Ameliarized data sets. I plan to bring this one file into AM and divide the sample weight by five to adjust the degrees of freedom to the correct sample size. I will like to know if this a correct use of the Ameliarized data sets. Is this procedure similar to what happens to the data in STATA? The alternative is to run my models separately on each Ameliarized data set and then average the results myself. I prefer not to do the latter because it will be an enormous task. Thank you for your assistance. I look forward to your response. Sincerely, Belkis Suazo-Garcia ________________________________________________ Belkis Suazo-Garcia, Doctoral Candidate Ph.D. Program in Sociology CUNY Graduate Center 365 Fifth Avenue New York, NY 10016 Office: (212) 817-8786 Email: bsuazo-garcia(a)gc.cuny.edu