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Warren Gilchrist 《Revue internationale de statistique》2008,76(3):401-418
Sir Francis Galton introduced median regression and the use of the quantile function to describe distributions. Very early on the tradition moved to mean regression and the universal use of the Normal distribution, either as the natural ‘error’ distribution or as one forced by transformation. Though the introduction of ‘quantile regression’ refocused attention on the shape of the variability about the line, it uses nonparametric approaches and so ignores the actual distribution of the ‘error’ term. This paper seeks to show how Galton's approach enables the complete regression model, deterministic and stochastic elements, to be modelled, fitted and investigated. The emphasis is on the range of models that can be used for the stochastic element. It is noted that as the deterministic terms can be built up from components, so to, using quantile functions, can the stochastic element. The model may thus be treated in both modelling and fitting as a unity. Some evidence is presented to justify the use of a much wider range of distributional models than is usually considered and to emphasize their flexibility in extending regression models. 相似文献
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As marketers attempt to place advertisements based on demographic profiles, the use of psychographic information becomes more important. The purpose of this research is to evaluate the validity of selected psychographic measures as well as to then relate these constructs to demographic segments. The analysis, using LISREL VI, assesses the constructs, which then, based on MANOV, are related to demographic segments. Implications of the study for validating psychographic measures and for applying this knowledge are discussed. © 1995 John Wiley & Sons, Inc. 相似文献
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Six of the simpler ARMA type models are examined with respect to properties of a variety of proposed estimators of unknown parameters. The findings suggest that if only one estimation method were available to a researcher the choice should probably be maximum likelihood. Stationarity- and invertibility-restricted estimation would appear appropriate when parameters are thought to be within 5 percent of constraint boundaries. 相似文献
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This paper considers the problem of accounting for employee entitlements. Accrued entitlements to annual leave, sick leave and long service leave are evaluated by reference to the basic characteristics of an accounting liability and a case is presented for liability recognition in each instance. An empirical survey undertaken by the authors shows current practice in this area and indicates the need for improved financial reporting. 相似文献
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Warren T. Dent 《Journal of econometrics》1980,12(1):49-58
Efficient estimation of models under linear restrictions on parameters has received little attention. We present a unified approach which takes account of both full rank and less than full rank design and constraint matrices. The procedure is numerically fast, accurate, and space efficient. An example is included. 相似文献
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Samantha Miles 《Journal of Business Ethics》2012,108(3):285-298
The concept of the ??stakeholder?? has become central to business, yet there is no common consensus as to what the concept of a stakeholder means, with hundreds of different published definitions suggested. Whilst every concept is liable to be contested, for stakeholder research, this is problematic for both theoretical and empirical analysis. This article explores whether this lack of consensus is conceptual confusion, which would benefit from further debate to try to reach a higher degree of elucidation, or whether the stakeholder concept is essentially contested, rendering the quest to seek a singular definition unfeasible. The theory of essentially contested concepts was proposed by Gallie (Proc Aristot Soc 56:167?C198, 1956). The seven criteria Gallie prescribes for evaluating essentially contested concepts are applied to the stakeholder concept. The analysis suggests that this concept is an essentially contested concept and this explains the degree of definitional variation. 相似文献