Banach空间中非线性脉冲Volterra积分方程解集的紧性与连通性

研究了Banach空间中的非线性脉冲Volterra积分方程的Lploc解的紧性与连通性.     

子公司“自下而上”的制衡:实现路径、弱化因素与作用边界

如何有效约束大股东掏空行为是公司治理学术界与实践界共同关注的焦点问题。传统的委托代理框架遵循母子公司“自上而下”的单向治理逻辑,忽视了子公司的自主性及其“自下而上”的制衡能力,难以从根本上解决子公司及其中小股东利益保护问题。尽管单向治理范式已经受到学者的质疑,但子公司通过何种方式对母公司产生制衡亟需进一步探索。文章基于前景理论的核心观点,运用2012—2017年中国上市子公司的平衡面板数据,采用多元回归方法验证了子公司管理者异质性对大股东掏空行为的影响,阐释了子公司“自下而上”制衡作用的实现路径、弱化因素及其作用边界。研究结果表明：上市子公司拥有能力较强的管理团队能够显著抑制大股东掏空行为。一方面,能力较强的管理者可以为大股东带来更多的控制权共享收益,限制了其控制权私有收益的获取,另一方面,也能够更加有效地识别与监督大股东的掏空行为,进而起到对大股东“自下而上”的制衡作用。作为具有双重效应的情境变量,CEO声誉及CEO与母公司关联度在中国情境下的负面效应更为凸显,二者均会弱化管理者能力对大股东掏空行为的制衡作用,即在子公司CEO声誉水平较高、子公司CEO与母公司关联度较强的情境下,子公...     

Not a lonely crowd? Social connectedness,religious service attendance,and the spiritual but not religious

Using the 2006–2014 General Social Survey and 2006–2012 Portraits of American Life Study, I find that on three dimensions of social connectedness: social interaction frequency, core discussion network size, and number of close ties, that religious service attenders are more connected than religious non-attenders and then either spiritual nor religious, but there are few differences between attenders and the spiritual but not religious. Difference-in-differences and fixed-effects models show little evidence that switches between categories are associated with changes in connectedness, and additional models show that prior social connectedness explains only a small amount of future switches. This paper challenges assumptions that the non-religious are a homogenous group lacking the benefits provided though the social networks of religious congregations and has implications for research on what it means to be spiritual, measuring religion and spirituality, and understanding the role of formal organizations in social life.     

The powerful relational language of ‘family’: togetherness,belonging and personhood

This article examines the notion of ‘family’ to consider how it may be understood in people's everyday lives. Certain recurrent and powerful motifs are apparent, notably themes of togetherness and belonging, in the context of a unit that the person can be ‘part of’. At the same time, there may be important variations in the meanings given to individuality and family, evoking differing understandings of the self and personhood. I consider these ideas further through globally relevant but variable cultural themes of autonomy and relationality, suggesting the term ‘social person’ as a heuristic device to distinguish the sense of ‘close‐knit selves’ that may be involved in some understandings of personhood. I argue that this version of personhood may be powerfully expressed through ‘family’ meanings, with a significance which can be at least provisionally mapped along lines of inequality and disadvantage within and between societies around the world. These forms of connectedness may be hard to grasp through those theoretical and methodological frameworks which emphasize the (relational) individual. I argue that, in affluent English speaking societies, ¹ there may be little alternative to the language of ‘family’ for expressing such forms of relationality and connection.     

Female Adolescents, the Experience of Violence, and the Meaning of the Body

Female adolescents who have experienced violence often struggle to maintain a sense of agency and control over their own bodies—bodies that have been objectified through direct physical assault. In order to understand more fully the impact of direct violence on the meaning of the body for female adolescents, the author discusses normative aspects of the meaning of the body and their relationship to the developmental processes of individuation and connectedness as well as subjectivity and objectivity. Case vignettes are used to explore the intersection of violence and the meaning and use of the body for female adolescents. Implications for intervention are proposed.     

Who cares about the environment?

ABSTRACT

Environmental behavior substantially differs among individuals depending on their environmental attitudes, connectivity to nature beliefs, and socioeconomic profile. People who adopt an eco-friendly lifestyle and those who are unconcerned about environmental protection represent population segments with diverse characteristics. Consequently, this study aims to identify homogeneous groups based on individuals’ environmental behavior. A total of 400 Greek citizens completed a self-report questionnaire. We used behavioral items adopted from previous studies to measure environmental behavior and background variables to assess the socio-demographic profile of the respondents. Additionally, we used the well-established measures of Connectedness to Nature Scale (CNS) and New Ecological Paradigm Scale (NEP) to measure people's relatedness with nature and their ecological beliefs separately. Multivariate Cluster Analysis results indicated that participants can be grouped into two broad segments, named moderate eco-friends and non-environmentalists. Individual differences between the clusters were detected with respect to gender, education, connectedness to nature and ecological worldview.     

Social connectedness among international students at an Australian university

A representative sample of undergraduate and postgraduate international students at a large Australian university (n = 979, 64% females) completed a mail-back survey examining their perceptions of social connectedness. Four aspects of social connectedness were investigated: (1) connectedness in Melbourne, (2) social mixing and interaction with co-culturals and Australians, (3) involvement in organisations, associations and groups, and (4) connections to home and family. The majority of students report being well-connected to others in Melbourne, although some desire increased personal support from people who know and care about them. Connectedness in Melbourne is related to students’ cultural background and communication skills in the new culture and their evaluation of their perceived academic progress. Students from Asian countries reveal different patterns to other students, especially in the relationships between connectedness and interactions with co-culturals. Awareness of these and other differences among international students from varying cultural backgrounds can help target assistance in achieving a sense of well-being.     

全球股票市场系统性金融风险的溢出效应研究——基于关联网络的研究视角

在开放的全球经济体系下,各国或地区金融市场的关联性不断上升,局部金融风险通过关联网络不断地扩散,进而形成全球性的金融危机,系统性风险溢出的网络特征受到各界的广泛关注。根据2005—2019年全球主要股票市场的股指数据,采用网络拓扑方法测度全球股市风险溢出效应,并采用滚窗估计对系统性风险溢出进行动态分析。实证结果表明,美国处于全球风险溢出网络的中心地位,而中国尚处于网络边缘,并与周边经济体产生明显的溢出效应。此外,全球系统性金融风险溢出水平呈现出一种“脆弱”的状态,易受风险事件的冲击。     

Feelings of Belonging: An Exploratory Analysis of the Sociopolitical Involvement of Black,Latina, and Asian/Pacific Islander Sexual Minority Women

This article compares and contrasts the sociopolitical involvement of Black, Latina, and Asian/Pacific Islander American sexual minority women within lesbian, gay, bisexual, and transgender (LGBT) communities of color. For the analysis, a sample of over 1,200 women from the Social Justice Sexuality project was analyzed. Findings indicate that, for all groups of women, feelings of connectedness to the LGBT community was the most significant predictor of sociopolitical involvement within LGBT communities of color.     

The Relationships Between Sense of Belonging to a Community GLB Youth Group; School,Teacher, and Peer Connectedness; and Depressive Symptoms: Testing of a Path Model

Research indicates belonging to a gay, lesbian, and bisexual (GLB) support group is indirectly associated with fewer depressive symptoms, via higher levels of sense of belonging to the general community. The current study extended this research by testing a path model to determine whether school, teacher, and peer connectedness are influenced by sense of belonging to a community GLB youth group. A sample of 82 Australian GLB adolescents aged 14 to 18 years who currently attend high school completed the Center for Epidemiologic Studies Depression Scale, the Psychological Subscale of the Sense of Belonging Instrument, and the Social Questionnaire for Secondary Students. Results indicated very good model fit. Higher levels of belonging to a community GLB youth group were associated with higher levels of school, teacher, and peer connectedness, but only peer connectedness was directly associated with depressive symptoms. Higher levels of school and teacher connectedness were associated with higher levels of peer connectedness. Interventions aimed at increasing belonging to a community GLB youth group may have indirect benefits for the mental health of GLB adolescents, via higher levels of school, teacher, and peer connectedness.