Education Management Corp. may lay off between 40 and 75 employees by the end of the summer, according to a WARN notice it filed with the state Department of Labor and Industry. The notice said the layoffs could occur between June 30 and Aug. 31. More details weren't immediately available, and a EDMC spokesman didn't immediately return an email seeking comment. EDMC has had several rounds of layoffs in the past, most recently cutting 3 percent of its workforce in June 2016, and has gradually been...