Empirical Studies That Suggest Differences in Utilization Rates Between Fee-For-Service

Empirical studies that suggest differences in utilization rates between fee-for-service and managed care plans

A) are unreliable due to statistical biases.
B) conclude that financial incentives are not the reason for differences in the amount of care physician provide.
C) show no differences in health status among patient groups.
D) are unable to differentiate between the impacts due to financial incentives and those due to clinical rules.