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301.
Cynthia Osborne Wendy D. Manning Pamela J. Smock 《Journal of marriage and the family》2007,69(5):1345-1366
We draw on three waves of the Fragile Families Study (N =2,249) to examine family stability among a recent birth cohort of children. We find that children born to cohabiting versus married parents have over five times the risk of experiencing their parents’ separation. This difference in union stability is greatest for White children, as compared with Black or Mexican American children. For White children, differences in parents’ education levels, paternal substance abuse, and prior marriage and children account for the higher instability faced by those born to cohabiting parents, whereas differences in union stability are not fully explained among Black and Mexican American children. These findings have implications for policies aimed at promoting family stability and reducing inequality. 相似文献
302.
Ravi P. Subramaniam Kenny S. Crump Cynthia Van Landingham Paul White Chao Chen Paul M. Schlosser 《Risk analysis》2007,27(5):1237-1254
Scientists at the CIIT Centers for Health Research (Conolly et al., 2000, 2003; Kimbell et al., 2001a, 2001b) developed a two-stage clonal expansion model of formaldehyde-induced nasal cancers in the F344 rat that made extensive use of mechanistic information. An inference of their modeling approach was that formaldehyde-induced tumorigenicity could be optimally explained without the role of formaldehyde's mutagenic action. In this article, we examine the strength of this result and modify select features to examine the sensitivity of the predicted dose response to select assumptions. We implement solutions to the two-stage cancer model that are valid for nonhomogeneous models (i.e., models with time-dependent parameters), thus accounting for time dependence in variables. In this reimplementation, we examine the sensitivity of model predictions to pooling historical and concurrent control data, and to lumping sacrificed animals in which tumors were discovered incidentally with those in which death was caused by the tumors. We found the CIIT model results were not significantly altered with the nonhomogeneous solutions. Dose-response predictions below the range of exposures where tumors occurred in the bioassays were highly sensitive to the choice of control data. In the range of exposures where tumors were observed, the model attributed up to 74% of the added tumor probability to formaldehyde's mutagenic action when our reanalysis restricted the use of the National Toxicology Program (NTP) historical control data to only those obtained from inhalation exposures. Model results were insensitive to hourly or daily temporal variations in DNA protein cross-link (DPX) concentration, a surrogate for the dose-metric linked to formaldehyde-induced mutations, prompting us to utilize weekly averages for this quantity. Various other biological and mathematical uncertainties in the model have been retained unmodified in this analysis. These include model specification of initiated cell division and death rates, and uncertainty and variability in the dose response for cell replication rates, issues that will be considered in a future paper. 相似文献
303.
In responding to victims of child sexual abuse, considerable attention has been given to multidisciplinary collaborative response teams. Recent evidence, however, suggests that team members may be divided by differences in attitudes towards victims and offenders and about the causes and consequences of abuse. This paper draws on a larger study of the various professionals who make up one child abuse response system in Newfoundland, Canada. In particular, the paper focuses on social workers, teachers and the police, and their views about the characteristics and credibility of sexual abuse victims, and the extent to which they attribute to the victim some responsibility for the abuse. Data for the study were collected in two stages: key informant interviews; and a survey of social workers, teachers and police. The analysis includes an interpretation of the role of gender, professional group membership and experience with cases. The most striking finding is the extent to which the child's age and behaviour appears to influence differentially attitudes about the victims' credibility. These differences complicate multidisciplinary collaborative initiatives since it would appear that those with the least real case experience, and the least knowledge about the relationship between abuse and behaviour, are the ones most likely to be the first point of contact for reports or disclosures. 相似文献
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307.
Yoon G. Lee Cynthia R. Jasper Margaret A. Fitzgerald 《Journal of Family and Economic Issues》2010,31(4):458-474
Using data from the 1997–2000 National Family Business Surveys (NFBS), this study investigated the effect of gender on business
success and profit growth among family businesses. The Ordinary Least Squares (OLS) results indicate that all else being equal,
female managers perceived their businesses as more successful than male managers, and they reported more profit growth between
1996 and 1999 than male managers. The results of the dummy variable interaction approach also show that a differential response
existed in profit growth over time between female and male managers in relation to health status, business liabilities, business
size, and whether the business was home-based. This study concludes that there are many distinct differences between male
and female managers in business performance. 相似文献
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Objectives: This qualitative project explored perceptions of adolescents and young adults (AYA) with perinatally acquired HIV (PHIV) regarding childbearing motivations and parenting. Methods: In-depth interviews were conducted with 35 AYA with PHIV (Mage = 20.5 years). Results: Primary childbearing motivations included the desire to experience parenthood, a wish to leave a legacy, and the chance to offer/receive unconditional love. Anticipated challenges included normative concerns (e.g., cost of parenting) and such HIV-specific concerns as parental disclosure/risk for transmission. Conclusions: Information is needed to tailor developmentally and culturally sensitive interventions to promote healthy development across the life span among the 3rd generation of HIV-affected families. 相似文献
310.