Hi noetsi I have a deterministic non-Stationarity. Should I regress my variable on the date (date is from Jan 2015 to Dec 2018) variable like that proc reg data=data; model Y=date; run;
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It works. Thank you so much. The problem was in date function when i verified my data i found that the ancient date function create date from 1983 to 2017 but for each debt's value
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