What kind of risk do the MCOs assess? Does risk-based compensation limit the freedom of primary care physicians in any way in terms of patient care? Why or why not? How does the capitation model of reimbursement work? Do physicians generally prefer one model over the other? Why or why not? Why do HMOs prefer the prepaid, monthly premium? Is pay-for-performance a better model than existing models of compensation? Are there limitations to it as well