The most common managed care financial arrangement, capitation, places healthcare providers in the role of micro-health insurers, assuming the responsibility for managing the unknown future health care costs of their patients. Small insurers, like individual consumers, tend to have annual costs that fluctuate far more than larger insurers. The term "Professional Caregiver Insurance Risk" explains the inefficiencies in health care finance that result when insurance risks are inefficiently transferred to health care providers who are expected to cover such costs in return for their capitation payments. As Cox (2006) demonstrates, providers cannot be adequately compensated for their insurance risks without forcing managed care organizations to become price uncompetitive vis-a-vis risk retaining insurers. Cox (2010) shows that smaller insurers have lower probabilities of modest profits than large insurers, higher probabilities of high losses than large insurers, provide lower benefits to policyholders, and have far higher surplus requirements. All these effects work against the viability of healthcare provider insurance risk assumption.