Under contract to the State of New York, researchers conducted in-depth micro-simulation analyses of four types of health care reforms being considered for state implementation: a single payer public health insurance option, Assembly Member Gottfried's New York Health Plus proposal that provides an option for all New Yorkers to enroll in Family Health plus, public-private hybrid options that simplify and expand existing public programs and reform private health insurance, and a market-based option that relies on regulatory flexibility and tax credits. The cost and coverage implications of state reform options falling into these four categories are presented in this report.