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71.
Network centrality and performance of social enterprises: Government certified social enterprises in Seoul,South Korea
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Social enterprises, which have been dramatically increasing all over the world for several decades, are facing the challenge of how best to develop strategies to improve performance and achieve sustainable growth. In South Korea, the government has supported active networking among social enterprises as a tactic for overcoming insufficient material and human resources. However, it is unclear whether active networking activities among social enterprises are associated with higher performance. In this study, a network survey of certified social enterprises (n = 78) in Seoul, South Korea was conducted. Multivariate regression models examined whether degree centrality, closeness centrality, and betweenness centrality were associated with the economic and social performance of social enterprises after controlling for organizational factors. The results revealed that a social enterprise with higher degree centrality in the network of regular meetings achieved higher social and economic performance. 相似文献
72.
In this paper we propose a consensus forecasting method based on a convex combination of individual forecast densities. The exact Bayesian updating of the convex combination weights is very complex and practically prohibitive. We propose a simple sequential updating alternative method based on function approximation. Several examples illustrate the method. 相似文献
73.
George P. Knight Sandra H. Losoya Young Il Cho Laurie Chassin Joanna Lee Williams Sonia Cota‐Robles 《Journal of research on adolescence》2012,22(4):782-796
We examined the association of joint trajectories of ethnic identity and criminal offending to psychosocial maturity, gang membership, and Mexican American affiliation among 300 Mexican American male juvenile offenders from ages 14 to 22. There were two low‐offending groups: one was the highest in ethnic identity and changing slightly with age and the other was the lowest in ethnic identity and stable with age. A third group displayed moderately declining offending and moderately stable ethnic identity. A fourth group displayed high‐offending individuals with moderate, but increasing, levels of ethnic identity, who were initially lower in psychosocial maturity and more likely to be gang members. The findings highlight the need to contextualize theories of ethnic identity development. 相似文献
74.
Boram Kim Sun Hwa Jung Sun Hee Jang Bohyun Lee Eunjeong Rhee Soo Hyun Cho Sang Min Lee 《The Career development quarterly》2014,62(3):239-253
This study was conducted to develop and initially evaluate the psychometric properties of the Planned Happenstance Career Inventory (PHCI), which aims to assess skill in using chance events to develop career opportunities. After item generation and exploratory factor analysis, 130 original items were reduced to 25 items across 5 factors (5 items for each corresponding factor). Multigroup confirmatory factor analysis confirmed the validity of this 5‐factor structure, and the goodness of fit showed an adequate fit to the observed data for both women and men. Results showed that PHCI subscales correlated moderately and in expected directions with career preparation, career decision‐making self‐efficacy, and career stress. These findings suggest that the PHCI, which assesses 5 dimensions of career‐related planned happenstance skill, shows promise as a useful tool for facilitating understanding of the influence of chance events on career choice behavior. 相似文献
75.
Simultaneous estimation for non-crossing multiple quantile regression with right censored data 总被引:1,自引:0,他引:1
In this paper, we consider the estimation problem of multiple conditional quantile functions with right censored survival data. To account for censoring in estimating a quantile function, weighted quantile regression (WQR) has been developed by using inverse-censoring-probability weights. However, the estimated quantile functions from the WQR often cross each other and consequently violate the basic properties of quantiles. To avoid quantile crossing, we propose non-crossing weighted multiple quantile regression (NWQR), which estimates multiple conditional quantile functions simultaneously. We further propose the adaptive sup-norm regularized NWQR (ANWQR) to perform simultaneous estimation and variable selection. The large sample properties of the NWQR and ANWQR estimators are established under certain regularity conditions. The proposed methods are evaluated through simulation studies and analysis of a real data set. 相似文献
76.
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78.
This article describes the design of a social studies unit about the Johnstown Flood of 1889 with a particular emphasis on how specific unit resources engaged middle school students in learning about the geographical and historical context of Johnstown, Pennsylvania. We also report on how the resources supported the teaching and learning of the historical thinking practice of contextualizing. 相似文献
79.
Seo Young Kang Jung Ah Lee Sung Sunwoo Byung-Yeon Yu Jun Hyung Lee Chung Hwan Cho 《Journal of sex research》2016,53(9):1165-1178
Although several studies have individually investigated the risk factors for erectile dysfunction (ED), premature ejaculation (PE), and late-onset hypogonadism (LOH), few studies have considered ED, PE, and LOH as categories of sexual dysfunction (SD) within the same population. We therefore aimed to investigate the prevalence of SD and its associated risk factors among men in primary care. Study participants were enrolled by 18 family physicians from 15 hospital-based family practices in Korea between August 2010 and May 2011. Participants answered a questionnaire regarding their demographic characteristics and lifestyle factors as well as the Korean versions of the Androgen Deficiency in the Aging Male, the International Index of Erectile Function, and the Premature Ejaculation Diagnostic Tool questionnaires. SD prevalence was 64.9% among study participants who were ≥ 40 years of age. ED prevalence was 43.7%, PE prevalence was 38.6%, and LOH prevalence was 16.8%. SD prevalence was significantly associated with increased age, overweight, hypertension, diabetes, and depression. These findings highlight the importance of screening questions for SD in primary care, especially among older male patients with the identified risk factors. 相似文献
80.
This study sought to examine the association between adolescents’ relationship with family and school and depressive symptoms
across ethnic/racial groups (White, Black, Hispanic, and Asian), and to test potentially unique explanatory power in youth–family
relationship versus youth–school relationship, in a sample of 4,783 adolescents. Depressive symptoms were assessed with a
19-item, modified Center for Epidemiologic Studies-Depression Scale (CES-D). The results indicated that youth–family relationship
and youth–school relationship were significant predictors of adolescent depression. However, the findings of the study indicated
that unique contributions by youth–family relationship and youth–school relationship were different by racial/ethnic groups.
These findings elucidate protective factors for adolescent depression and highlight the importance of cultural context of
each racial/ethnic group. 相似文献