Stats for city-improvements - where is it?

[Ralf]

Where have been topics that lists the stats for wonders, units, terrain-values & terrain-improvements and whatnot. Explaining exactly what each unit/improvement does.

But what about stats for city-improvements? Exactly, how much, and in what way, does each undevidual city-improvement contribute? Nothing in the manual, and nothing in any thread - where is it?
A glaring oversight? Even SMAC had an extensive table on its base-improvements. Does (at least) the game-civilopedia bother with these city-improvement stats?

[General Ludd]

the civilopedia has everything. the isn't a great deal of change i the improvements department, anyways.

[Ralf]

Originally posted by Osweld
the civilopedia has everything. the isn't a great deal of change i the improvements department, anyways.

Is it more then just a general description? I want to know exactly what each city-improvement actually do. Besides, they could have added above in that manual as well. Why wonders, but not city-improvements?