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81.
We study claims problems in which a certain amount of indivisible units (of an homogeneous good) has to be distributed among a group of agents, when this amount is not enough to fully satisfy agents’ demands. Our aim is to find solutions fulfilling procedural and fairness properties. To do that, we define the M-down methods, which are the unique robust (composition down and consistency) and fair (balancedness and conditional full compensation) rules. Besides, we also establish the relationship between these M-down methods and the constrained equal awards rule. 相似文献
82.
For some discrete state series, such as DNA sequences, it can often be postulated that its probabilistic behaviour is given by a Markov chain. For making the decision on whether or not an uncharacterized piece of DNA is part of the coding region of a gene, under the Markovian assumption, there are two statistical tools that are essential to be considered: the hypothesis testing of the order in a Markov chain and the estimators of transition probabilities. In order to improve the traditional statistical procedures for both of them when stationarity assumption can be considered, a new version for understanding the homogeneity hypothesis is proposed so that log-linear modelling is applied for conditional independence jointly with homogeneity restrictions on the expected means of transition counts in the sequence. In addition we can consider a variety of test-statistics and estimators by using φ-divergence measures. As special case of them the well-known likelihood ratio test-statistics and maximum-likelihood estimators are obtained. 相似文献
83.
Early acquisition of stereotypes that associate “blue” with boys and “pink” with girls can influence their preferences for these colors and also their choices in clothing, toys or objects in relation to gender stereotypes. In a Spanish sample (5–10-year olds, n = 614), this study reproduces the previous research conducted by Karniol (Sex Roles 65(1/2):119–132, 2011) for the purpose of analyzing whether gender-linked color preferences rule the choice of coloring booklets and if children’s choices of color are affected by their own gender. The results show that although boys used fewer female-stereotyped colors than girls, both genders colored in each figure with the stereotyped colors associated with them. This result indicates that boys and girls share similar gender stereotypes and use colors that agree with these stereotypes. 相似文献
84.
Pablo Martínez-Camblor Carlos Carleos Jesus Á Baro Javier Cañón 《Journal of applied statistics》2014,41(8):1848-1856
Modern technologies are frequently used in order to deal with new genomic problems. For instance, the STRUCTURE software is usually employed for breed assignment based on genetic information. However, standard statistical techniques offer a number of valuable tools which can be successfully used for dealing with most problems. In this paper, we investigated the capability of microsatellite markers for individual identification and their potential use for breed assignment of individuals in seventy Lidia breed lines and breeders. Traditional binomial logistic regression is applied to each line and used to assign one individual to a particular line. In addition, the area under receiver operating curve (AUC) criterion is used to measure the capability of the microsatellite-based models to separate the groups. This method allows us to identify which microsatellite loci are related to each line. Overall, only one subject was misclassified or a 99.94% correct allocation. The minimum observed AUC was 0.986 with an average of 0.997. These results suggest that our method is competitive for animal allocation and has some interpretative advantages and a strong relationship with methods based on SNPs and related techniques. 相似文献
85.
Bayesian decision problems require subjective elicitation of the inputs: beliefs and preferences. Sometimes, elicitation methods may not represent perfectly the judgements of the decision maker. Several foundations propose to overlay this problem using robust approaches. In these models, beliefs are modelled by a class of probability distributions and preferences by a class of loss functions. Then, we are in the conditions of a Pareto order. Hence the solution concept is the set of non dominated alternatives. In this article we focus on the computation of the efficient set when the preferences are modeled by a class of convex loss functions. 相似文献
86.
The estimation of the finite population mean in successive occasions is investigated with calibration estimators in this article. We propose several estimators based on calibration techniques with arbitrary sampling design in each of the occasions. Asymptotic variance formulaes are derived for the proposed estimators. The properties of these estimators are studied via a simulation study and using natural populations. 相似文献
87.
Andrés García-Cano Consuelo Paterna Carmen Martínez 《Revista de Psicología Social》2016,31(3):521-553
The feminization of service-oriented NGOs on volunteering needs to consider gender differences when exploring the system of volunteer motivations. This study examines the relationship of these motivations with gender self-schema and type of service-oriented NGOs. For this purpose, 160 volunteers from 21 Spanish NGOs completed a questionnaire. The results show that, once the effect of time spent volunteering was removed, there was a significant effect of gender self-schema in relation to motivation and there was a significant interaction effect between gender self-schema and type of NGO. Specifically, masculine volunteers were less motivated than feminine, androgynous and undifferentiated persons. Also, masculine people working with the elderly were the least motivated volunteers and androgynous people working in service-oriented NGOs dedicated to children and adolescents were the most motivated individuals. The results indicate the relevance of androgyny in understanding volunteering, as well as the importance of promoting non-sexist educational proposals to increase men’s participation in these activities. 相似文献
88.
Patricia Canto Jesús Benítez Granados Mónica Adriana Martínez Ramírez Edgardo Reyes Guillermo Feria-Bernal Eduardo García-García 《The aging male》2016,19(3):187-191
Mitochondrial defects have been related to obesity and prostate cancer. We investigated if Mexican–Mestizo men presenting this type of cancer, exhibited somatic mutations of ATP6 and/or ND3.Body mass index (BMI) was determined; the degree of prostate cancer aggressiveness was demarcated by the Gleason score. DNA from tumor tissue and from blood leukocytes was amplified by the polymerase chain reaction and ATP6 and ND3 were sequenced. We included 77 men: 20 had normal BMI, 38 were overweight and 19 had obesity; ages ranged from 52 to 83. After sequencing ATP6 and ND3, from DNA obtained from leukocytes and tumor tissue, we did not find any somatic mutations. All changes observed, in both genes, were polymorphisms. In ATP6 we identified, in six patients, two non-synonymous nucleotide changes and in ND3 we observed that twelve patients presented non-synonymous polymorphisms. To our knowledge, this constitutes the first report where the complete sequences of the ATP6 and ND3 have been analyzed in Mexican–Mestizo men with prostate cancer and diverse BMI. Our results differ with those reported in Caucasian populations, possibly due to ethnic differences. 相似文献
89.
María Vera Isabel M. Martínez Laura Lorente Mª José Chambel 《Social indicators research》2016,126(3):1143-1156
The objective is to analyze the relationship between job resources (i.e., job autonomy and social support) and work engagement in nurses. Hypotheses have been tested through hierarchical linear modeling using data from 313 Portuguese nurses (individual level) nested in 33 work teams (team level), after aggregating individual perceptions to the group level and testing the agreement among these perceptions using the rwg(j) and the intraclass correlations indices. Results confirmed first, that individual job autonomy and team-level social support (from the supervisor as well as from co-workers) are positively related to individual work engagement and second, that team-level social support has a moderating effect on the relationship between individual job autonomy and individual work engagement (but not in the case of co-workers’ support). This study provides evidence that nurses’ work engagement results from individual job autonomy and collective social support. Accordingly, fostering job autonomy and social support in order to promote work engagement among nurses can be useful for both hospital managers and practitioners. 相似文献
90.
Carmen Martínez Carolina Vázquez Juan Manuel Falomir-Pichastor 《Journal of homosexuality》2015,62(11):1560-1575
This research examined the hypothesis that heterosexual men’s motivation to differentiate themselves from gay men mediates the relationship between the antifemininity norm of masculinity and antigay prejudice. We assessed masculinity through three concepts: status, thoughness, and antifemininity. Participants then reported their perceived similarity with gay men and their antigay prejudice. The results showed that antifemininity was the best predictor of both perceived similarity and antigay prejudice: The more people endorsed the antifemininity norm, the more they perceived themselves as dissimilar from gay men and showed antigay prejudice. More important, perceived similarity mediated the effect of antifemininity on antigay prejudice. These findings provide direct evidence for the link between masculinity and the motivation to differentiate oneself from gay men, and they suggest that antigay prejudice accomplishes the identity function of maintaining unambiguous gender boundaries. 相似文献