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1.
European Journal of Population - Previous research shows that parentally bereaved children in north-western Europe in the past left home earlier than children who lived together with both... 相似文献
2.
In this paper, we revisit the problem of testing of the hypothesis of circular symmetry of a bivariate distribution. We propose some nonparametric tests based on sector counts. These include tests based on chi-square goodness-of-fit test, the classical likelihood ratio, mean deviation, and the range. The proposed tests are easy to implement and the exact null distributions for small sample sizes of the test statistics are obtained. Two examples with small and large data sets are given to illustrate the application of the tests proposed. For small and moderate sample sizes, the performances of the proposed tests are evaluated using empirical powers (empirical sizes are also reported). Also, we evaluate the performance of these count-based tests with adaptations of several well-known tests such as the Kolmogorov–Smirnov-type tests, tests based on kernel density estimator, and the Wilcoxon-type tests. It is observed that among the count-based tests the likelihood ratio test performs better. 相似文献
3.
Eliane R. Rodrigues Mario H. Tarumoto Guadalupe Tzintzun 《Journal of applied statistics》2019,46(3):395-415
In this work, we assume that the sequence recording whether or not an ozone exceedance of an environmental threshold has occurred in a given day is ruled by a non-homogeneous Markov chain of order one. In order to account for the possible presence of cycles in the empirical transition probabilities, a parametric form incorporating seasonal components is considered. Results show that even though some covariates (namely, relative humidity and temperature) are not included explicitly in the model, their influence is captured in the behavior of the transition probabilities. Parameters are estimated using the Bayesian point of view via Markov chain Monte Carlo algorithms. The model is applied to ozone data obtained from the monitoring network of Mexico City, Mexico. An analysis of how the methodology could be used as an aid in the decision-making is also given. 相似文献
4.
The main objective of this work is to evaluate the performance of confidence intervals, built using the deviance statistic, for the hyperparameters of state space models. The first procedure is a marginal approximation to confidence regions, based on the likelihood test, and the second one is based on the signed root deviance profile. Those methods are computationally efficient and are not affected by problems such as intervals with limits outside the parameter space, which can be the case when the focus is on the variances of the errors. The procedures are compared to the usual approaches existing in the literature, which includes the method based on the asymptotic distribution of the maximum likelihood estimator, as well as bootstrap confidence intervals. The comparison is performed via a Monte Carlo study, in order to establish empirically the advantages and disadvantages of each method. The results show that the methods based on the deviance statistic possess a better coverage rate than the asymptotic and bootstrap procedures. 相似文献
5.
In 2010, the United States experienced the worst environmental disaster in its history. An explosion on a BP oilrig located in the Gulf of Mexico triggered the crisis. As a result, the United States coast guard and BP were charged with crisis communication in its response to the crisis. This essay provides an unprecedented examination and analysis of the communication experiences of public information officers who worked in the unified command center in Houma, Louisiana during the Deepwater Horizon oil spill response. The authors use the discourse of renewal theory to understand the communication practices and choices of the public information officers. Then, using the renewal framework, the authors present three implications for improving crisis communication research and practice. 相似文献
6.
ABSTRACTIn this article responsibilisation in social work is studied by analysing two Finnish state-level policy documents (called final report and research report) which concern a current activation initiative called inclusive social security (ISS). It is asked how social workers and clients are constructed as responsible subjects in these documents. Responsibilisation refers to the advanced liberal mode of governmentality, which aims to strengthen citizens’ abilities to self-governance through various techniques that include the intertwined elements of surveillance and empowerment. It is demonstrated that the policy documents construct the social workers’ and the clients’ responsibilities partly in different ways. The final report leads activation to be based on shared responsibility and social work to be more community-based, whereas the research report strengthens more individual-based responsibility of clients and social workers. For the clients, the interpretation of ISS based on shared responsibility would probably be less stigmatising and paternalistic than the one based on individual responsibilities, i.e. approaching long-term unemployed citizens as being personally ‘at risk’ and thus a justified target group of individualised techniques for activation. For social workers and clients, future activation appears to be a wide mix of different techniques, moral expectations and possible ways of being a responsible subject. 相似文献
7.
This article examines consumer perspectives on match-fixing in esports – professionalized competitive video game play – and the implications of these perspectives for understanding game and gambling integrity. The relationship between match-fixing, game integrity and gambling is a close one, as gambling markets are reliant on strong game integrity, but has not yet been studied in detail in the context of esports. Drawing on extensive qualitative data collected from esports fans around the world, this article examines perceptions of gambling awareness, integrity and esports gambling to assess esports consumers’ awareness of and attitudes towards gambling-related match-fixing. Results indicate that esports viewers are not deeply concerned by match-fixing. In addition, spectators typically view gambling as a cause of corruption among competitors, but also understand and accept some elements of the practice. Further, spectators tend to rely on rules to determine their assessment of what is ‘wrong’, rather than assessments based on ethics, and are often willing to forgive infractions through a range of reasons and justifications. We propose a need for education among esports spectators, extending existing anti-cheating programmes beyond just athletes to include the broader esports community. 相似文献
8.
Journal of Nonverbal Behavior - Age-related deficits are often observed in emotion categorization tasks that include negative emotional expressions like anger, fear, and sadness. Stimulus... 相似文献
9.
Jessica R. Frampton 《Atlantic journal of communication》2019,27(1):46-61
Drawing on informational utility, uncertainty management, and self-efficacy models, predictions were developed about how individuals select media messages when faced with the transition from college to postcollege life. Predictions were also made concerning how message exposure influences self-efficacy and behavior. Participants filled out a questionnaire and then browsed a university blog that contained alumni posts about transition success (high-efficacy messages) or failure (low-efficacy messages) in a variety of life domains, including the target domain, romance. Browsing was unobtrusively measured through hyperlink tracking. Results indicate that selective exposure to low-efficacy romance messages was predicted by romance outcome expectancies; romance uncertainty discrepancy had an indirect effect on selective exposure through outcome expectancies and self-efficacy’s impact on outcome expectancies. Thus, outcome expectancies and self-efficacy should be considered when predicting exposure to high- versus low-efficacy messages during a life transition. 相似文献
10.
Arthur Sakamoto Christopher R. Tamborini ChangHwan Kim 《Population research and policy review》2018,37(1):91-116
This paper investigates long-term earnings differentials between African American and white men using data that match respondents in the Survey of Income and Program Participation to 30 years of their longitudinal earnings as recorded by the Social Security Administration. Given changing labor market conditions over three decades, we focus on how racial differentials vary by educational level because the latter has important and persistent effects on labor market outcomes over the course of an entire work career. The results show that the long-term earnings of African American men are more disadvantaged at lower levels of educational attainment. Controlling for demographic characteristics, work disability, and various indicators of educational achievement does not explain the lower long-term earnings of less-educated black men in comparison to less-educated white men. The interaction arises because black men without a high school degree have a larger number of years of zero earnings during their work careers. Other results show that this racial interaction by educational level is not apparent in cross-sectional data which do not provide information on the accumulation of zero earnings over the course of 30 years. We interpret these findings as indicating that compared to either less-educated white men or highly educated black men, the long-term earnings of less-educated African American men are likely to be more negatively affected by the consequences of residential and economic segregation, unemployment, being out of the labor force, activities in the informal economy, incarceration, and poorer health. 相似文献