Methodological Issues in the Evaluation of the National Long Term Care Demonstration. III. STATISTICAL METHODOLOGY


Given the randomized design, unbiased estimates of channeling impacts could be obtained simply by comparing mean values of outcomes for the treatment and control groups. The approach actually used in the evaluation, however, was ordinary least squares regression. The regression models used in the evaluation, the types of statistical tests and significance levels employed, and the interpretation of estimates and tests are the topics of this section.

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