Hello everyone, I need to run grsftest code (NOT grstest which works properly) but stata shows a message that says "operator invalid". Anyone can help with this, please?
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Your question really isn't clear without more detail, or at a minimum it is too difficult to guess at a good answer from what you have shared. Please help us help you. Show example data. Show your code. Show us what Stata told you. The Statalist FAQ provides advice on effectively posing your questions, posting data, and sharing Stata output.
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