The general information in the library data entry is not entirely correct.  The reason large-scale psychohistory experiments are no longer conducted is due to the unpredictable results achieved by the only sizable experiment to date, which was conducted as part of the psionic suppressions.  The unforeseen results of this experiment were so far-reaching that Imperial scientists concluded that their knowledge of the principles involved was woefully inadequate and that further study was required.  Imperial research into psychohistory is undertaken at a small number of research stations and is carried out under the strictest of controls.

See also Psionic Suppressions.

-IE ldr