On Unbiased Estimation of Positive Integral Powers of the Natural Parameter in Exponential Families

We explore the structure of one‐parameter exponential families admitting an unbiased estimator for a positive integral power of the natural parameter. It is seen that only exponential families dominated by Lebesgue measure can have this property. It is outlined that similar results can be obtained for other functions of the natural parameter.     

完全分配格上的极小族拓扑

采用极小族理论建立了完全分配格上的另外一种拓扑棗极小族拓扑,使得最大标准极小族是该拓扑仅有的非平凡开集。给出了极小族拓扑的一些性质及该拓扑下函数连续的必要条件,讨论了该拓扑下映射的连续性和广义序同态的关系,证明了完全分配格上的标准极小族映射为广义序同态。     

Finite mixtures of natural exponential families

Let μ be a positive measure concentrated on R⁺ generating a natural exponential family (NEF) F with quadratic variance function V_F(m), m being the mean parameter of F. It is shown that v(dx) = (γ+x)μ(γ ≥ 0) (γ ≥ 0) generates a NEF G whose variance function is of the form l(m)Δ+cΔ(m), where l(m) is an affine function of m, Δ(m) is a polynomial in m (the mean of G) of degree 2, and c is a constant. The family G turns out to be a finite mixture of F and its length-biased family. We also examine the cases when F has cubic variance function and show that for suitable choices of γ the family G has variance function of the form P(m) + Q(m)m where P, Q are polynomials in m of degree m2 while Δ is an affine function of m. Finally we extend the idea to two dimensions by considering a bivariate Poisson and bivariate gamma mixture distribution.     

The Emotional Environment of Families Experiencing Chronic Poverty in India

The emotional environment of families living in chronic poverty in India was explored. We hypothesized that the poor (when compared to the nonpoor) would report more aversive interaction and would report less family and life satisfaction. Results showed partial support for our hypotheses. Poor husbands expressed love to wives in fewer ways than the nonpoor men, and they were more likely to use physical or verbal abuse with wives and children. Poor wives showed anger more frequently to husbands and children than the nonpoor wives. However, there were no differences between the poor and the nonpoor on family and life satisfaction. Thus, income alone was not a sufficient predictor of the family's emotional environment.     

Are At-Risk Parents Getting What They Need? Perspectives of Parents Involved with Child Protective Services

This qualitative study explores the perspective of 24 parents who were at risk for having their children placed in foster care but ultimately retained custody of their children. We asked participants to reflect on their parenting needs prior to Child and Protective Services involvement and if and/or how they implemented parent education skills post-intervention. Parents most frequently cited stressors such as financial strain and single parenthood as contributing factors associated with their involvement with the child welfare system. Many parents stated that they wanted help with their parenting practices and provided their thoughts about time-out and physical punishment. Implications include assessing parental stress at the onset of services, seeking to understand the unique needs of families, evaluating the impact of length of time services are offered, and helping parents utilize age-appropriate discipline strategies.     

Processes Linking Social Class and Racial Socialization in African American Dual-Earner Families

We examined the links between social class, occupational self-direction, self-efficacy, and racial socialization in a sample of 128 two-parent African American couples raising adolescents. A series of multivariate, multilevel models revealed that mothers' SES was connected to self-efficacy via its association with occupational self-direction; in turn, self-efficacy partially explained the association between occupational self-direction and racial socialization. The link between maternal self-efficacy and racial socialization depended on whether or not children had experienced discrimination. For fathers, a strong link between SES and occupational self-direction emerged, but significant associations were not found between occupational self-direction and self-efficacy, or self-efficacy and racial socialization. The discussion focuses on mother-father differences and the role of child effects in racial socialization.     

Gendered Expectations? Reconsidering Single Fathers’ Child‐Care Time

We take a fresh look at an important question in the sociology of gender and family: Do single fathers “mother”? We add to the theoretical debate by proposing that single fathers face competing interactional pressures, to simultaneously act like mothers and men. Using nationally representative data from the American Time Use Survey 2003 – 2006 (N = 16,654), we compare the time single fathers spend on child care to other parent types, paying special attention to differences in employment profiles, household composition, and care arrangements. Accounting for these differences, single fathers spend slightly less time caring for children than do mothers, but more time than married fathers. Interesting differences emerge, however, depending upon the age of the youngest child in the household.     

‘Lady,Leave My Culture Out of It!’ An Interview With Nada Miocevic

Nada Miocevic is a social worker and family therapist who trained at Zagreb University in Croatia and at Melbourne University in Victoria, Australia. She completed her training in family therapy in 1975 at the Bouverie Centre, Melbourne. Since migrating to Australia in 1967, her work with migrant and refugee families has taken her throughout Australia and overseas. Currently she is in private practice. Her work involves conducting training courses in supervision and supervision of supervision, as well as her continuing work with families who experience long‐term illnesses.     

Subsidized Housing and Household Hardship Among Low‐Income Single‐Mother Households

We investigate associations of housing assistance with housing and food‐related hardship among low‐income single‐mother households using data from the National Survey of America’s Families (N = 5,396). Results from instrumental variables models suggest that receipt of unit‐based assistance, such as traditional public housing, is associated with a large decrease in rent burden and modest decreases in difficulty paying rent or utilities and residential crowding. Receipt of tenant‐based assistance, such as housing vouchers or certificates, is associated with a modest increase in housing stability but also with modest increases in rent burden and difficulty paying rent or utilities. We find no associations between either type of housing assistance and food related hardship.     

文学世家与女性文学——以明清吴江沈、叶两大文学世家为中心

文学世家与女性文学是明清文学史上重要的文学现象.其一,文学世家孕育了女性作家.其二,文学世家间的联姻更进一步成就了女性文学.这些也是文学世家区别于文学流派而明显具有家族文化的特征之所在.其三,社会文化生态环境是文学世家与女性文学得以发展的重要因素,这种社会文化生态环境表现为文学创作和理论关注两个方面.