A reader alerts us to this in SF Chronicle:
With the fifth anniversary of the Sept. 11 attacks fast approaching, President Bush took to the podium Tuesday to speak to Americans about his administration's global war on terror.
Three things can be expected from Bush's speech, according to a new study by three Columbia University researchers: The media will repeat the president's remarks. Public fear of terrorism will increase. And the president's poll numbers will rise.
Those have been the effects of presidential pronouncements on terrorism since the Sept. 11 attacks, according to political scientists Brigitte Nacos, Yaeli Bloch-Elkon and Robert Shapiro, in a report prepared for this month's annual meeting of the American Political Science Association.