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Kitchener M., Beynon, M., & Harrington, C. (2004). Explaining the Diffusion of Medicaid Home Care Waiver Programs Using VPRS Decision Rules. Healthcare Management Science 7/3: 237-244.
Abstract
This paper presents the first Variable Precision Rough Sets (VPRS) analysis of national data to examine inter-state variation in the Medicaid HCBS waiver program. The exposition provides a detailed discussion of the methodological options and processes, tests the generated rules using a leave-one-out cross-validation, and compares VPRS classification accuracy with regression analyses of the same dataset. The results demonstrate that VPRS offers a robust method with two distinctive features for health care research. First, for policy makers and their audiences, VPRS results are presented as “if … then …” decision rules with likelihoods stated as percentages. Second, for analysts generating evidence for health policy, VPRS provides a rigorous data mining tool and acknowledges inherent analytical uncertainty in the field.
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