The aggressive approach of Justice Dept. trustbuster Anne K. Bingaman is setting off a turf fight between Justice and the Federal Trade Commission. The two agencies share jurisdiction, but usually only one will consider any case. Bingaman created a stir in July when she moved to take over an investigation of Microsoft Corp. after the FTC deadlocked. Now, the FTC is moving in on a high-profile merger that Justice had been studyingQHome Shopping Network Inc.Us proposed $1.2 billion takeover of QVC Network Inc. Justice claimed jurisdiction because it had earlier approved another merger involving HSN. But sources say the FTC has assumed the case because it is probing a related matter involving the parties. The rivalry is bad news for business, which has gotten used to any proposed deal being reviewed only by one agency.

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