Is Dow Chemical Rushing Rohm & Haas Deal?

Why is Dow Chemical (DOW Quote) possibly hurrying to write a $15.3 billion check for Rohm & Haas(ROH Quote) when many observers believe it's worth less than half that amount?

According to a report Monday evening by The Associated Press, Dow plans to release a statement early Tuesday on the deal, and the merger with the company could close as soon as Thursday, the AP reported. Rohm & Haas said it will not be issuing a statement and that it does not expect to be affected by Dow's release.

The Midland, Mich.-based company could announce U.S. regulatory approval Tuesday, with European assent and a closing following on Thursday, Greenwich Consultants analyst Michael Judd said. ...