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111.
Stability and change in kindergartners' friendships were examined based on a typology of profiles (stable, fluid, loss, gain, friendless). Our purpose was to determine whether children belonging to the five profiles differed in their social functioning. The sample was composed of 2353 kindergartners. Reciprocal friendships and social functioning indices were measured using peer nominations collected in October and May of the same year. A series of repeated measures analysis of variance indicated that children in the friendless profile were less accepted by their peers, more shy, more withdrawn, and more aggressive than other children. Moreover, children in the stable profile were significantly more accepted by their peers, more prosocial, and less shy than children in the fluid profile. Lastly, children in the loss profile became less accepted by their peers and less prosocial over the course of the year whereas children in the gain profile became more accepted and prosocial. 相似文献
112.
Test statistics for checking the independence between the innovations of several time series are developed. The time series models considered allow for general specifications for the conditional mean and variance functions that could depend on common explanatory variables. In testing for independence between more than two time series, checking pairwise independence does not lead to consistent procedures. Thus a finite family of empirical processes relying on multivariate lagged residuals are constructed, and we derive their asymptotic distributions. In order to obtain simple asymptotic covariance structures, Möbius transformations of the empirical processes are studied, and simplifications occur. Under the null hypothesis of independence, we show that these transformed processes are asymptotically Gaussian, independent, and with tractable covariance functions not depending on the estimated parameters. Various procedures are discussed, including Cramér–von Mises test statistics and tests based on non‐parametric measures. The ranks of the residuals are considered in the new methods, giving test statistics which are asymptotically margin‐free. Generalized cross‐correlations are introduced, extending the concept of cross‐correlation to an arbitrary number of time series; portmanteau procedures based on them are discussed. In order to detect the dependence visually, graphical devices are proposed. Simulations are conducted to explore the finite sample properties of the methodology, which is found to be powerful against various types of alternatives when the independence is tested between two and three time series. An application is considered, using the daily log‐returns of Apple, Intel and Hewlett‐Packard traded on the Nasdaq financial market. The Canadian Journal of Statistics 40: 447–479; 2012 © 2012 Statistical Society of Canada 相似文献
113.
This study examined (a) growth curves of youth participation in sports, performance and fine arts, and youth clubs throughout the high school years and (b) the associations between a series of predictors and the initial participation rates and growth over time. The predictors included individual, friend, and family factors. The moderating effect of youths' gender was also examined. Study participants were 272 youths (55% girls, Mage=12.4 years) and their parents. The predictors were assessed in Grade 6 and were based on reports by youths, parents, teachers, and classmates. Participation in organized activities was assessed annually from Grades 7 to 10. Altogether, the findings revealed that participation in sports, performance and fine arts, and youth clubs remains stable across the high school years. However, interindividual differences were found in the participation growth curves. This variation was predicted by individual, friend, and family factors, mostly with respect to sports activities. 相似文献
114.
Replacing the Canadianization Generation: An Examination of Faculty Composition from 1977 through 2017
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Amid growing numbers of doctoral graduates entering an increasingly competitive global academic job market, concerns about equity in the hiring process and the value of the Canadian Ph.D. are mounting. Grounded within the historical context of the Canadianization Movement, we examine the doctoral credentials of 4,934 U15 social science faculty between 1977 and 2017 to understand the ebb and flow of incoming and outgoing faculty across the country's academic field. Our trend analyses reveal an overall increase in the proportion of Canadian‐trained faculty hires with the noted exceptions of Canada's top three universities who display a strong presence of high‐status American‐trained faculty throughout. Results from the contemporary period, between 1997 and 2017, reveal a time of retirement during which outgoing Canadian‐trained faculty are replaced with increasing proportions of American‐trained academics. 相似文献
115.
This study examined the etiology of transformational leadership in virtual team contexts. First, we compared 127 members of virtual decision-making teams with 135 members of traditional face-to-face teams in terms of the relationship between aspects of personality and the emergence of transformational leadership. The type of communication media (face-to-face versus “pure” virtual) was found to interact with extraversion and emotional stability in the prediction of emerging transformational leadership. In line with prior findings, we showed how these personality characteristics were relevant to transformational leadership emergence in our face-to-face teams. However, they were largely unrelated to such leadership in the virtual team context. We also focused specifically on the virtual context by analyzing the content of team interactions. After accounting for the effect of degree of activity level, the linguistic quality in one's written communication was found to predict the emergence of transformational leadership in virtual teams. 相似文献
116.
The number of free or open access articles is increasing rapidly, and their retrieval with library indexes and OpenURL link resolvers has been a challenge. In June 2014, the SFX MISCELLANEOUS_FREE_EJOURNALS target contained more than 24,000 portfolios of all kinds. The SFX KnowledgeBase Advisory Board (KBAB) carried out an international survey to get an overview of the usage of this target by the SFX community and to precisely identify what could be done to improve it. The target is widely used among the community. However, many respondents complained about three major problems: (a) incorrect links, (b) full texts actually not free, and (c) incorrect or missing thresholds (years and volumes information). 相似文献
117.
Studies reporting sociometric assessments based on nominations have been characterized by important methodological inconsistencies when conducted in the middle school context. The purpose of this study was to examine (1) the possibility of a response bias when participants are provided with a long roster sorted alphabetically, (2) the impact of including or not other‐sex peers in the voting population, and (3) the impact of including or not all the grademates in the voting population. Participants were 664 sixth graders from three middle schools. Peer nominations for sociometric items (i.e., like most and like least), as well as teacher ratings of antisocial behavior and records of academic performance, were collected. A sequence effect in peer nominations was found, suggesting that students whose names were listed higher on the rosters received more nominations than did students whose names were listed lower on the list. Moreover, results indicated that the nominations received from the other‐sex grademates and from the grademates outside the classroom improved the predictive validity of the sociometric measure. The implications of these results for the use of sociometric assessment in middle schools are discussed. 相似文献
118.
François Bourguignon Francisco H. G. Ferreira Michael Walton 《Journal of Economic Inequality》2007,5(2):235-256
This paper discusses a research agenda that arises from unanswered questions and unresolved issues considered in the World
Bank’s World Development Report 2006: Equity and Development. After formalizing the key concepts of equity; equality of opportunity; and efficiency, and proposing a definition for an
equitable development policy, the paper discusses the concept of inequality traps, around which the research agenda is structured.
Four broad groups of research questions are highlighted: those revolving around the measurement of inequality of opportunity
and the diagnostics for the existence of an inequality trap; those dealing with the causes of inequality traps; the quantification
of their efficiency costs; and those related to how institutions (including governments) evolve to overcome inequality traps.
Bourguignon and Ferreira are in the Development Economics Vice-Presidency, The World Bank. Michael Walton is at the John F.
Kennedy School of Government, Harvard University. Together, they led the team that produced the World Bank’s World Development Report 2006: Equity and Development. 相似文献
119.
Catherine Mackenzie Dominic Keuskamp Anna Ziersch Fran Baum 《The Australian journal of social issues》2011,46(4):347-369
Little is known about the experience of those in the baby boom cohort who are outside the labour market. Understanding their experience has the potential to inform policy strategies to support older people to remain longer in the workforce. Using in‐depth interview data from 26 participants, this paper examines the reasons people aged between 50 and 64 years give for being not‐employed, how they perceive it affects their health, how socioeconomic characteristics shape their experience and what would entice them back into paid work. Participants' main reasons for being not‐employed included: feeling financially able and ready to exit, feeling unhappy about workplace reorganisations, disability, or their partner's retirement or ill‐health. The reasons given and the degree to which they had planned to exit the workforce affected their willingness and capacity to consider returning. Key determinants of participants' health and wellbeing after stopping paid work were the extent to which they had planned their exit and the status of their health and wealth at the time of their exit. The paper concludes there is some scope for increasing the number of employed older people if policy makers attend to workforce health and wellbeing as crucial to workforce retention policy development. 相似文献
120.
How is it that catastrophes always seem predictable ex post but never ex ante? The paradox is recurrent. Our study of the warnings issued prior to one of the last major natural disasters in France – the tempest of December 27, 1999 – focuses on the organizational factors accounting for the surprise effect of the catastrophe, to try and understand why, though the phenomenon had been predicted and announced by the French weather bureau, the protagonists of Civil Defense said the magnitude of the event took them by surprise. A multi-level, qualitative analysis of the inter-organizational meteorological alert system shows that a combination of factors pertaining to structure, context and individuals transformed the warnings into routine messages. The case of the 1999 storm allows us to introduce a particular, ideal-type of risk, the treacherous risk, which, though clearly announced, was disregarded because seemingly so familiar. 相似文献