Please post your tag synonym suggestions as new answers in this thread, one answer per suggestion. Upvote answers where you believe that the suggested tags should be made synonyms, and downvote answers where you believe the tags should remain separate. Well upvoted suggestions will be eventually implemented by the moderators (and then the corresponding answers will be deleted).
Not sure, but perhaps:
I suppose one can have a model with only random effects and no fixed effects, which would make it different from a mixed model, though I don't think the conceptual distinction is so large that it would merit a separate tag. And I think all the questions I've seen with this tag are about using random effects in mixed models.
There seems to be a fair bit of overlap between:
And the usage of hypothesis-testing (9591) overlaps a fair bit as well, though in principle it does differ more.
Is there a case for merging the first two? And perhaps editing the tag info for the third to make a distinction?