Evidence for the Will Rogers phenomenon in migration of employees to managed care plans

Employees have increasing opportunities to enroll in managed care plans, an d employers tend to favor these plans because of their lower costs. However , lower costs may be the result of selection of healthier patients into man aged case plans. This study measured differences in health care utilization across an indemnity plan and a managed care plan, and for all employees to gether. me found that apparent increases in utilization in both indemnity a nd managed care plans disappeared when the plans were viewed together, refl ecting the migration of sicker patients from indemnity plans to managed car e plans.