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report, developed by the Center for Studying Health System Change (HSC), identifies three market changes and their impact on California's ability to provide cost effective quality health care through its current system. California's insurance industry has operated under what the authors refer to as a "delegated model," in which providers accept fixed per-member payment rates from insurers in exchange for accepting responsibility for ensuring proper utilization of resources and oversight of medical personnel. This model was considered the source of California's prior success in controlling the rise of health care costs - for providers, insurers, as well as consumers - and the development of high quality, efficient medical practices. However, the HSC report suggests that three recent market developments threaten the continued existence of this model.