Optimal spacing of quantiles for the estimation of the mixing parameters in a mixture of two exponential distributions

Methods for estimating the mixing parameters in a mixture of two exponential distributions are proposed. The estimators proposed are consistent and BAN(best asymptotically normal). The optimal spacings for estimating these mixture parameters are calculated.     

The collected works of john w. tukey

We describe novel, analytical, data-analysis, and Monte-Carlo-simulation studies of strongly heteroscedastic data of both small and wide range.Many different types of heteroscedasticity and fixed or variable weighting are incorporated through error-variance models.Attention is given to parameter bias determinations, evaluations of their significances, and to new ways to correct for bias.The error-variance models allow for both additive and independent power-law errors, and the power exponent is shown to be able to be well determined for typical physicalsciences data by the rapidly-converging, general-purpose, extended-least-squares program we use.The fitting and error-variance models are applied to both low-and high-heteroscedasticity situations, including single-response data from radioactive decay.Monte-Carlo simulations of data with similar parameters are used to evaluate the analytical models developed and the various minimization methods em-ployed, such as extended and generalized least squares.Logarithmic and inversion transformations are investigated in detail, and it is shown analytically and by simulations that exponential data with constant percentage errors can be logarithmically transformed to allow a simple parameter-bias-removal procedure.A more-general bias-reduction approach combining direct and inversion fitting is also developed.Distributions of fitting-model and error-variance-model parameters are shown to be typically non-normal, thus invalidating the usual estimates of parameter bias and precision.Errors in conventional confidence-interval estimates are quantified by comparison with accurate simulation results.     

“They give you back that dignity”: understanding the intangible resources that make a transitional house a home for homeless families

Approximately 33% of the homeless population in 2017 were families with children. Researchers have argued for interventions and services to employ an ecological perspective to mitigate some of the unintentional harm inherent in existing programs designed to serve homeless families. This paper utilized a case study of a transitional housing program to (1) determine how well the program met recommendations informed by the ecological perspective and (2) explore underlying themes across recommendations. Past and current residents of a transitional housing program participated in semi-structured interviews as part of a program evaluation. Interviews were deductively and inductively coded to meet aims 1 and 2, respectively. Residents identified several aspects of the program that met the ecological perspective recommendations including culturally-responsive services, trauma-based services, and social and community connections. Major underlying themes spanning across recommendations included interpersonal resources (caring, sense of belonging), empowerment resources (advocacy, family preservation), impact on family (family life, positive youth development), and communication. This case study, through the analysis of residents’ perspectives, highlights the important role of transitional housing programs in providing a supportive, empathetic, empowering, and home-like environment that gives residents “back that dignity” so they are emotionally and physically prepared to successfully transition to permanent housing.     

The Infringement of the Right to Establish a Family for Jewish Spouses Who Are Mutually Proscribed from Marrying Each Other

Abstract

The article focuses on one of the most painful experiences in intimate relationships and unveils a hitherto unexplored type of human right infringement, namely the right to establish a family in Israel, purported to be a democratic state. Thousands of couples are proscribed from marrying each other every year in Israel. This paper focuses on Jewish couples consisting of male Cohanim (descendants of Jewish priests) and female divorcées, as one among other types of forbidden marriages. Four themes emerged from data analysis of narratives of 26 interviewees, which converged to a common motif of liminality of Cohen-divorcée couples. Based on empirical data, I describe the predicament attendant to this human rights violation which is transmitted to offspring of these couples. The article argues that this liminality undermines the basic rationale of the prevailing millet (personal law) system and discusses the implications of this liminality for human rights and religion-state relations.     

Stages of change and engagement in a family intervention

Prochaska and DiClemente's stages of change model facilitate understanding of engagement difficulties in psychosocial intervention processes. We assessed the link between stages of family change and intervention dropout in a sample of 141 families with relational conflicts between parents and adolescent children. Each family member's stage of change was defined according to three criteria: seeing the conflict as a relational problem, assuming part of the responsibility for the dysfunctional relationship, and understanding one's own mental and emotional states and those of the other family members involved in the conflict (mentalization). Our dropout rate for the sample was 41.8% and was higher for immigrant families. We found a strong association between engagement and the contemplation stage of change, particularly the mother's. In family conflict interventions, participation of all the family members is essential so as raise awareness of the relational aspects of the conflict and the shared responsibility for the conflict and its resolution.     

Effects of Leader Support in the Work Unit on the Relationship Between Work Spillover and Family Adaptation

This study examines the direct versus the buffering effect of leader support in the work unit on the relationship between work spillover and family adaptation. The analyses use data from a probability sample of 3,190 married soldiers in the U.S. Army who participated in the 1989 Army and Family Survey, and the data are analyzed by the gender of the respondent. Two types of work spillover are examined in the analysis (energy and time interference), and both internal and external types of family adaptation are hypothesized and supported by the empirical analysis. Only modest support is found for the buffering effect hypothesis. In support of the direct effect hypothesis, the findings indicate that leader support in the work unit decreases perceptions of work spillover, which is a preventive effect, and enhances perceptions of external adaptation, which is a therapeutic effect.     

影响我国农村家庭普通高中教育投资的因素分析——基于新制度经济学的视角

投资普通高中教育是我国农村家庭改变生存状况、提高生命质量、实现阶层向上流动的主要渠道。从新制度经济学的视角来看,影响该项教育投资预期收益的主要因素是交易成本大、费用高。其具体表现为交易资产专用性高、交易不确定性强、交易频率低和交易度量难度大。针对这些因素提出具体的解决思路。