The crucial role Vioxx plays in Merck's portfolio was apparent last week when Merck's shares plunged 27 percent to $33 after the withdrawal announcement.

Roussel had timed its withdrawal announcement to coincide with an important medical conference in Rio de Janeiro, producing a predictable outpouring of criticism from health specialists.

When it comes to withdrawal announcements, politicians are under no obligation to practice full disclosure.

Discussing the Soviet withdrawal announcement, he said, "I don't believe Gorbachev did it unilaterally or without a deal with Washington."

"First, the good news: Joe is going to make his withdrawal announcement next Friday."

Under the treaty, withdrawal announcements are supposed to take effect 90 days after they are made, or on Saturday, in North Korea's case.

If the quarterly report is filed subsequently, the Service may reissue the acknowledgment letter and retract the withdrawal announcement.

Mr. Redman said there was no connection between the Soviet withdrawal announcement and the negotiations with Mongolia on relations.

In his withdrawal announcement, Hannah indicated that he wished to see anti-Lawrence forces unite and remove the mayor from office.

Despite his withdrawal announcement, documents filed with the Federal Election Commission indicated that Mr. Perot continued to spend money on his candidacy.