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Approximate conditional inference for a real parameter in the presence of nuisance parameters was examined from a sample-space
differential viewpoint in Fraser and Reid (1988) and a conditional inference procedure was proposed. Conditional likelihood-based
inference in the same setting was discussed in Cox and Reid (1987), where emphasis was placed on orthogonalizing the nuisance
parameter to the parameter of interest. In this paper the sample-space partitions of the two methods are examined for the
case that the minimal sufficient statistic has the same dimension as the parameter space. The methods are identical if observed
and expected information gives the same orthogonality; an example indicates how they can differ more generally. A specially
chosen reparameterization provides some geometrical insight to the methods and allows a comparison in terms of score functions
and locally defined orthogonal parameters. 相似文献
997.
The methods developed by John and Draper et al. of partitioning the blends (runs) of four mixture components into two or more orthogonal blocks when fitting quadratic models are extended to mixtures of five components. The characteristics of Latin squares of side five are used to derive rules for reliably and quickly obtaining designs with specific properties. The designs also produce orthogonal blocks when higher order models are fitted. 相似文献
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We find significant style differences between articles written by economists for their professional journals and articles by the same economists in the Wall Street Journal. We find no evidence that style influences the professional success of economists, which suggests that the private rewards to improving the quality of writing are low. Indeed, each community of scholars has probably adopted a "professionally correct" writing style, from which its members diverge little. However, scholars do alter their rhetorical style to communicate effectively with audiences other than the professional community. This suggests that intra- and inter-group (written) communication by economists is efficient. 相似文献
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