First of all, facepalm.
Second of all, the preferred term is "oldbisity" (rhymes with "obesity" which is a good reference point).
Third of all, your formula boggles me:
Quote:
We might then think to derive a quantity describing not only a poster's influence through surviving posts, but also through the impact of old posts which are now gone. We might call this olbiness, or, as I prefer, oldbosity. A possible construction for such a measure is (total posts)^2/(surviving posts + 1).
If the formula is intended to take into account the impact of BOTH "surviving posts" AND "old posts which are now gone" then why in the world are you dividing by surviving posts? Well, let me show this confusion with some algebra. We can say that
Total posts = surviving posts + missing posts
or
Total = surviving + missing
So, substituting into your fraction (I'm ignoring the +1 for convenience, since it isn't relevant in broad strokes), we get
(Surviving + missing)^2 / Surviving
(Surviving + missing)(Surviving + missing) / Surviving
(Surviving^2 + (2 * Surviving * Missing) + Missing^2) / Surviving
Surviving + (2 * Missing) + (Missing^2 / Surviving)
If it wasn't obvious before, this should make it clear that what your formula actually does, is take into account the impact of missing posts, but then REDUCE the result by the impact of surviving posts... sometimes:
Missing 100, Surviving 10, Result: 1210
Missing 100, Surviving 100, Result: 400
Missing 100, Surviving 1000, Result: 1300
As you can see, this is not a sensible formula!