Hello, I'm new to SAS and I'm having a hard time dummy coding dummy variables. I have a 4 level categorical variables (level of education) and understand I should have 3 dummy variables, but that output codes 0 for levels 2 and 4. Should I include the 4th code, and if I do, how do I know which one is the reference variable. Thank you. DATA WORK.IMPORT1; SET WORK.IMPORT; IF _educag = 1 THEN educagd=1; ELSE educagd = 0; IF _educag = 2 THEN educagd=1; ELSE educagd = 0; IF _educag = 3 THEN educagd=1; ELSE educagd = 0; RUN;
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