Allstate Insurance established a corporate restructuring plan in which it fired employee-agents, then rehired them either one year after they were fired or at the end of the severance they received, whichever was longer. Statistical evidence showed that, of the 6,000 employees affected by the policy, 90 percent were older than 40 and that the over-40 group constituted only 23 percent of Allstate’s total workforce. Does the policy have a disparate impact in violation of the ADEA because older employees generally received severance for longer than younger employees?