More companies are doing away with sick time, at least in name, offering a lump sum of paid time off instead of separate pools of vacation, sick and personal days. Steven Pyser, a human resource management professor at Temple's Fox School of Business, said the move is part of a trend of employees demanding more flexibility as they are asked to do more with less. "You're giving an employee an opportunity to have control over an aspect of the employment relationship that traditionally they wouldn't have," he said.