Twenty-one percent of employers expect to add full-time, permanent employees in the fourth quarter, according to the latest survey from CareerBuilder and USA TODAY. The October to December period is the fourth consecutive quarter where at least one-in-five employers planned to increase headcount. The survey, which was conducted by Harris Interactive© from August 17 to September 2, 2010, included more than 2,400 hiring managers and human resource professionals and more than 3,100 workers across industries and company sizes.