Chicago—Corporate Project Resources Inc., a company that supplies marketing temps to Fortune 500 companies, released Tuesday a study called "2005 Spending & Staffing Trends for Corporate Marketing Departments." The study, which surveyed 2,500 marketing professionals, found that 52% of Fortune 500 companies planned to hire additional marketers in 2005. At the same time, 77% of companies surveyed said they need additional marketing staff. "Today’s marketing departments are dealing with burnt fingers from the mass layoffs they had a few years back and are not as eager to hire on a permanent basis," CPRi’s CEO Sean Bisceglia said in a statement. "That’s why we have seen a surge in Fortune 500 companies using interim marketing professionals to fill gaps, and we plan to see it continue through 2005."