5:22 AM
A new tag created by Michael Hardy.
2

The Robbins lemma, named after Herbert Robbins, says that if $X\sim\operatorname{Poisson}(\lambda)$ and $g$ is a function for which $\operatorname{E}(|X g(X)|) < \infty,$ then $$\operatorname{E}(Xg(X)) = \lambda \operatorname{E}(g(X+1)).$$ "Gaussian integration by parts" is an identity that says...

5:33 AM
I see that you have created (empirical-bayes) tag. It might be useful to create also tag-wiki or at least tag-excerpt. It might help other users to use the tag correctly. (This is probably not a problem here, since the tag name seems to be descriptive enough.) Another reason is that the tags used on only one question are automatically deleted after certain time unless they have tag-wiki. — Martin Sleziak 27 secs ago
Empirical Bayes methods are procedures for statistical inference in which the prior distribution is estimated from the data. This approach stands in contrast to standard Bayesian methods, for which the prior distribution is fixed before any data are observed. Despite this difference in perspective, empirical Bayes may be viewed as an approximation to a fully Bayesian treatment of a hierarchical model wherein the parameters at the highest level of the hierarchy are set to their most likely values, instead of being integrated out. Empirical Bayes, also known as maximum marginal likelihood, represents...

5:58 AM
Now there is at least short tag-excerpt and tag-wiki. Thanks to Michael Hardy.

2 hours later…
7:51 AM
This is going on on chemistry.SE:
5

Finally, TRE is back, and we've got stuff to do. The next TRE will be held at 2017/04/08 16:00 – 18:00 UTC. Register for the event here. This episode will feature the following tags: reaction questions: As we see fit, we will retag ones that are worth it, delete ones that deserve it, and ...

But I guess something similar is unfeasible here. We would need more users interested in maintaining tags and editing posts.
And also the fact that this is much bigger site with much more traffic is an obstacle.

12 hours later…
8:04 PM
@MartinSleziak thank you for the heads up. I am afraid I might not be able to pursue this, but maybe.