NEW YORK: The Dow Jones Industrial Average plummeted more than 500 points on Thursday, setting off recessionary red flags. It fell a further 200 points during Friday trading before eventually finishing up 61 points at the end of the day.

A drastic decline in the US market, coupled with lingering unemployment problems and the debt crisis in Europe, has reawakened fears of a double-dip recession. While the PR industry has largely been immune to economic troubles in the past thanks to the ...