Hello, after programming a proc reg statement in SAS, there is written in the output: Note: Model is not full rank. Least-squares solutions for the parameters are not unique. Some statistics will be misleading. A reported DF of 0 or B means that the estimate is biased. Note: The following parameters have been set to 0, since the variables are a linear combination of other variables as shown. Some of my estimates are signed with DF B. Can I trust them anyway? If not, how can I solve this problem? Are the two notes Independent of one another or exists a connection? Thank you very much for your help.
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