Kaiser Permanente, a standout among managed health care systems, has become a model of how to deliver good health care cost-effectively. Illustration Capsule 6.4 describes how Kaiser Permanente has made vertical integration a central part of its strategy. What value chain segments has Kaiser Permanente chosen to enter and perform internally? How has vertical integration aided the organization in building competitive advantage? Has vertical integration strengthened its market position? Explain why or why not.