Thanks for the suggestion. I did it and it was successful but with typing the file name instead of 'have'. I can see from the output file that it creates composite variable by just placing the value of two variables side by side. The resulting composite variable has values very different from rest of the data. I thought composite variables are created by some mean of calculation using averages, variances, etc., and the resulting values looks alike with the rest. Also, the variances may have to be similar to the original values in each variable as very different variances result in error in structural equation modelling. I didn't find any other program but SAS to create composite variable. I'm not an expert in these issues, so any suggestions will be very much helpful. Thank you.
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