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151.
Joel Watson 《Econometrica : journal of the Econometric Society》2007,75(1):55-81
This paper develops a theoretical framework for studying contract and enforcement in settings with nondurable trading opportunities and complete but unverifiable information. The framework explicitly accounts for the parties' individual trade actions. The sets of implementable state‐contingent payoffs, under various assumptions about renegotiation opportunities, are characterized and compared. The results indicate the benefit of modeling trade actions as individual, rather than as public, and they highlight the usefulness of a structured game‐theoretic framework for applied research. 相似文献
152.
Using data from the Caregiving in the U.S. 2015 national survey, we compared characteristics of lesbian, gay, bisexual, and transgender (LGBT) and non-LGBT caregivers of older adults and explored predictors of caregiver strain. LGBT caregivers were younger, more racially/ethnically diverse, and less frequently a spouse/partner compared with their heterosexual counterparts. LGBT caregivers more frequently reported helping with medical nursing tasks and reported higher levels of financial strain. While LGBT identity was not an independent predictor of greater strain, characteristics more frequently reported by LGBT caregivers were, for instance, helping with medical nursing tasks. In addition, LGBT individuals who were children of the older adult were more likely to report higher levels of emotional strain than other relationship types. 相似文献
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154.
Conjoint analysis studies typically utilize orthogonal fractional factorial experimental designs to construct a set of hypothetical stimuli. Occasionally, these designs include environmentally correlated attributes that can lead to stimulus profiles that are not representative of the subject's environment. To date, no one has proposed a remedy well-grounded in statistical theory. This note presents a new methodology utilizing combinatorial optimization procedures for creating modified fractional factorial designs that are as “orthogonal” as possible, which do not contain nonrepresentative stimulus profiles. 相似文献
155.
One of the shortcomings of goal programming lies in its linearity, assumption, specifically in the objective function. This assumption compels one to work with constant marginal utilities and rates of substitution. In this paper a quadratic preference function, which is more consistent with economic theory and reality, is formulated and introduced into goal programming. In an effort to facilitate the understanding of the proposed procedure, two illustrative examples—one with symmetric preferences and the other with asymmetric preferences, both applied to the objective function—are solved and compared with a goal programming solution. 相似文献
156.
Summary Some calculations were performed usingTang's method as an aid in planning experiments for studying the population dynamics of the Jeffrey pine beetle. The population
dynamics studies were aimed at detecting the importance of specific effects, e. g., tree diameter, tree height. TheTang procedure is a method of estimating the sample size required to detect effects of a given magnitude with analysis of variance
tests. Using this procedure some sample calculations were performed which indicated the sample size needed, and the efficacy
of different strategies of improving the results, e. g., increasing the number of trees sampled versus increasing the area
of the tree sampled. The statistical parameters used in the calculations were estimated from some preliminary sampling data.
Use of this procedure is recommended in insect population studies as a method of optimally planning experiments, and as a
method of making precise conclusions about the significance of specific effects.
This study was supported by Contracts 68-03-0273 and 68-03-2442 with the U. S. Environmental Protection Agency, Corvallis
Environmental Research Laboratory, Corvallis, Oregon. This paper has been reviewed by the Corvallis Environmental Research
Laboratory and approved for publication. Approval does not signify that the contents necessarily reflect the views and policies
of the U. S. Environmental Protection Agency, nor does mention of trade names or commercial products constitute endorsement
or recommendation for use. 相似文献
157.
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159.
A proof is provided to show that Gehan's 1965 generalization of the two sample Wilcoxon test lies outside the class of efficient score procedures for right censored data (Prentice 1978). 相似文献
160.
The finite sample distribution of the likelihood ratio sta-tistic is obtained for testing independence, given marginal homo-geneity, in the absolutely continuous bivariate exponential distri-bution of Block and Basu (1974). This test is discussed in light of the analysis of Gross and Lam (1981) on times to relief of head-aches for standard and new treatments on ten subjects. 相似文献