There were 3.5 million job openings on the last business day of February, little changed from January, the U.S. Bureau of Labor Statistics reported today. The hires rate (3.3 percent) and separations rate (3.1 percent) were little changed in February. The job openings rate, at 2.6 percent, has trended upward since the end of the recession in June 2009. (Recession dates are determined by the