数学中国w, madio,net 156 The UMAP Journal 29.2(2008) Introduction Many countries have recently introduced reforms in the health sector with the explicit aim of improving performance [Mathers et al. 2000: 2001] There is extensive literature on health-sector reform and recent debates have emerged on how best to measure performance so that the impact of reforms can be assessed [Goldstein 1996]. Measurement of performance requires an explicit framework defining the goals of a healthcare system and a suitable method to make a compelling evaluation So our goal is pretty clear Devise metrics to evaluate the effectiveness of a healthcare system Devise a method to combine the metrics Compare several representative countries. Restructure the healthcare system of the U.S. and build predictive models to test the chan Our approach is: Analyze factors that can affect the performance of a healthcare system. Search the literature on existing evaluation methods and find their short- Develop a comprehensive evaluation method that asks only for existing data or data easy to measure and collect Collect experimental data that can be used in our method. Compare current methods and determine their characteristics. Do a sensitivity analysis of variations of our models Restructure the healthcare system of the U.S. and build a model based on neural networks to test changes. Do further discussion based on our work Four Representative healthcare Systems The healthcare system, as an important part of the social security sys- m, is essential to promote the stability of society, and it reflects social justice. Due to the different histories, cultures, and status of human rights protection, healthcare systems vary from country to country. There are four representative healthcare systems[Ding 2005:数学中国 www.madio.net