All registered users of the current release of Stata (Stata 18) are eligible for free technical support. If you have not registered your copy of Stata, please fill out the online registration form.
If you are using a network copy of Stata or if your institution has a Stata site license, you are still eligible for technical support, but you will need to provide the Stata serial number that you are using. (To locate the Stata serial number, type about in Stata's Command window.) You will also need to have access to the Stata documentation.
Would you look for the answer to your question in a statistics book or in the Stata documentation? If the answer would be in a statistics book, then your question may not be appropriate for technical support, but there are alternatives.
If you cannot find the answer to your question using the resources above, please contact Stata Technical Services.
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Last updated: 16 November 2022
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