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排序方式: 共有318条查询结果,搜索用时 31 毫秒
61.
Jeremy Greenwood Philipp Kircher Cezar Santos Michle Tertilt 《Econometrica : journal of the Econometric Society》2019,87(4):1081-1113
Twelve percent of the Malawian population is HIV infected. Eighteen percent of sexual encounters are casual. A condom is used a third of the time. To analyze the Malawian epidemic, a choice‐theoretic general equilibrium search model is constructed. In the developed framework, people select between different sexual practices while knowing the inherent risk. The calibrated model is used to study several policy interventions, namely, ART, circumcision, better condoms, and the treatment of other STDs. The efficacy of public policy depends upon the induced behavioral changes and equilibrium effects. The framework complements the insights from epidemiological studies and small‐scale field experiments. 相似文献
62.
63.
Jeremy Jewell Megan Schmittel Allison McCobin Stephen Hupp Andrew Pomerantz 《Journal of divorce & remarriage》2017,58(1):16-28
This study evaluated the effectiveness of the 2nd and 3rd editions of the Children First parent education programs for parents experiencing divorce or separation. Participants were 678 parents experiencing separation or divorce in 2 Midwestern counties. Changes from pretest to posttest on participants’ knowledge, attitudes, and likelihood of adaptive coparenting were assessed. Both editions of the program had a significant positive effect on all 3 measures of adaptive coparenting. The effect sizes from pretest to posttest for the 2nd edition were small, whereas the effect sizes for the 3rd edition of the program were nearly twice as large. Superiority of the 3rd edition might be due to an increased focus on explicit training on adaptive coparenting behaviors. 相似文献
64.
Jeremy Staff Alyssa M. Yetter Kelsey Cundiff Nayan Ramirez Mike Vuolo Jeylan T. Mortimer 《Journal of research on adolescence》2020,30(2):406-422
Past cohorts of teenagers who spent long hours in jobs were more likely to drop out of high school than those who worked moderate hours or did not work at all. This article examines the association between employment intensity and dropout among adolescents in the High School Longitudinal Study of 2009 who traversed high school during a time of decreased prevalence of both employment and dropout relative to earlier cohorts. Analyses reveal that a relatively small percentage of teenagers nowadays are characterized as either intensive workers or dropouts (around 11% each). Yet, despite declines in intensive employment and dropout, disadvantaged youth remain overrepresented in both groups, and intensive work is still a risk factor for poor grades and dropout. 相似文献
65.
Jeremy Braithwaite 《Journal of child sexual abuse》2018,27(6):589-611
Though there is evidence linking the history of colonialism and oppression of Indigenous people to the high rates of rape and child sexual abuse experienced by this population today, it is less understood how colonial processes, past and present, condition the decision to disclose or report victimization. Drawing on a survivorship storytelling study of rural Alaska Native survivors of child sexual abuse, this paper underscores the importance of centering colonialism in understanding the culture of silence surrounding sexual victimization among Indigenous people. Results show that reasons for non-disclosure are quite embedded within larger social, historical and political themes of colonialism, oppression, and marginalization. Implications for policy and praxes are discussed, as well as a broader mandate of social change to remove barriers to disclosure. 相似文献
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67.
Dinan MA Weinfurt KP Friedman JY Allsbrook JS Gottlieb J Schulman KA Hall MA Dhillon JK Sugarman J 《Accountability in research》2006,13(4):325-342
The authors reviewed the conflict of interest policies of 9 academic medical centers in the United States and interviewed members of the Institutional Review Boards (IRBs) and Conflict of Interest Committees (COICs) at those institutions. They found that many institutions used processes for reporting and managing conflicts of interest that were more decentralized than the processes described in their policies. Also, most institutions had no clear and comprehensive policy to guide investigators regarding disclosure of conflicts of interest to potential research participants. Considerable differences in understanding of conflict of interest policies were observed between IRB and COIC officials. 相似文献
68.
Jeremy W Bray Brooks Depro Dorren McMahon Marion Siegle Lee Mobley 《Journal of Labor Research》2016,37(3):317-342
Since the Great Recession, US policy and advocacy groups have sought to better understand its effect on a group of especially vulnerable young adults who are not enrolled in school or training programs and not participating in the labor market, so called ‘disconnected youth.’ This article distinguishes between disconnected youth and unemployed youth and examines the spatial clustering of these two groups across counties in the US. The focus is to ascertain whether there are differences in underlying contextual factors among groups of counties that are mutually exclusive and spatially disparate (non-adjacent), comprising two types of spatial clusters – high rates of disconnected youth and high rates of unemployed youth. Using restricted, household-level census data inside the Census Research Data Center (RDC) under special permission by the US Census Bureau, we were able to define these two groups using detailed household questionnaires that are not available to researchers outside the RDC. The geospatial patterns in the two types of clusters suggest that places with high concentrations of disconnected youth are distinctly different in terms of underlying characteristics from places with high concentrations of unemployed youth. These differences include, among other things, arrests for synthetic drug production, enclaves of poor in rural areas, persistent poverty in areas, educational attainment in the populace, children in poverty, persons without health insurance, the social capital index, and elders who receive disability benefits. This article provides some preliminary evidence regarding the social forces underlying the two types of observed geospatial clusters and discusses how they differ. 相似文献
69.
Kendall Jeremy 《Voluntas: International Journal of Voluntary and Nonprofit Organizations》1998,9(1):3-10
VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - 相似文献
70.
The selection of plant species for use on green roofs has been based primarily on their ability to cope with the harsh climatic conditions of the urban rooftop environment. However, green roof plants must also survive in engineered substrates that often lack organic material and beneficial soil microorganisms such as mycorrhizal fungi. We review the literature on mycorrhizae in the context of green roof ecosystems, identifying aspects of green roof functioning that could be enhanced through the integration of mycorrhizal fungi. Although relatively few studies have addressed the influence of mycorrhizal symbiosis on green roof plants specifically, we include information from a variety of naturally occurring habitats with analogous growing conditions. The available literature suggests that the incorporation of mycorrhizal fungi can improve a number of green roof functional attributes, including plant diversity, drought resilience, leachate quality, nutrient use efficiency and carbon sequestration, all while reducing the need for external nutrient inputs. We present evidence that mycorrhizal fungi are of general benefit to green roof ecosystems, and can be effectively integrated into green roof design. We recommend methods for this integration and propose future research directions. 相似文献