Mark Zmijewski, a professor at the University of Chicago's Graduate School of Business, said by his own estimates based on documents he had reviewed from Oracle that around 10,000 PeopleSoft employees stood to lose their jobs if Oracle succeeded in its takeover bid.

Zmijewski said Oracle's cost-saving estimates of about $1.2 billion resulting from the merger were not "verifiable" because there was "no methodology" and "no factual" basis upon which Oracle's figures rested. The professor, however, said he used the same information to derive his job-loss estimates.

Oracle said last Friday it believed about 6,000 PeopleSoft employees stood to lose their jobs in the event of a takeover.

The released International Business Machine Corp. documents had been put under court seal at the outset of the trial because of IBM's concerns about the confidentiality of the information.

The documents, however, released Thursday still kept IBM's estimate on the potential financial impact of an Oracle/PeopleSoft merger under court seal.

Oracle said at the beginning of the trial that the documents show IBM fears losing millions of dollars if Oracle succeeds in its hostile takeover bid.

David Teece, a professor at the University of California at Berkeley's Haas School of Business, also cited on Thursday separate internal IBM documents that refer to the changing technology market and how IBM could counter the competitive threat of a merged Oracle/PeopleSoft.

Teece, Oracle's final witness, testified he also believed the U.S. government's case to block Oracle's takeover bid ignores competition that would keep a lid on software prices even if the two companies merged.