منابع مشابه
Directionality, timing, and sample selection in epidemiologic research design.
The foregoing commentaries demonstrate wide differences between their authors’ choice of terms describing epidemiologic research designs, and in the relative importance they attach to directionality, timing, and sample selection. Nowhere is this more evident than in their discrepant definitions of “prospective” and “retrospective” studies. According to Drs Greenland and Morgenstern, “Prospectiv...
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We have considered a perfect sample method for model selection of finite mixture models with either known (fixed) or unknown number of components which can be applied in the most general setting with assumptions on the relation between the rival models and the true distribution. It is, both, one or neither to be well-specified or mis-specified, they may be nested or non-nested. We consider mixt...
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We extend the method of adaptive two-stage sequential sampling toinclude designs where there is more than one criteria is used indeciding on the allocation of additional sampling effort. Thesecriteria, or conditions, can be a measure of the targetpopulation, or a measure of some related population. We developMurthy estimator for the design that is unbiased estimators fort...
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Data on subject selection biases in research with older adults are limited. We conducted two sample bias studies that assessed primary caregivers for dementia patients. The first study compared 46 caregivers, who required home interviews, with 63 caregivers willing to travel to the university hospital for assessment; all subjects had been offered free taxi service. Caregivers interviewed at hom...
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ژورنال
عنوان ژورنال: Review of Regional Studies
سال: 2012
ISSN: 1553-0892,0048-749X
DOI: 10.52324/001c.8127