WSJ -- “We’re squeezed too.” There was a time when human resources departments handled every staffing need at a company, from hiring and firing to administering benefits and determining salaries. But HR’s role has begun to change significantly as departments have shrunk at companies across the board. According to a study by the Society for Human Resource Management, the profession’s largest association, the head count at the average HR department fell from 13 in 2007 to nine in 2008. “HR departments are under pressure like never before,” says Steve Miranda, the society’s global HR and integration officer.