Identity for the NPMLE in Censored Data Models

We derive an identity for nonparametric maximum likelihood estimators (NPMLE) and regularized MLEs in censored data models which expresses the standardized maximum likelihood estimator in terms of the standardized empirical process. This identity provides an effective starting point in proving both consistency and efficiency of NPMLE and regularized MLE. The identity and corresponding method for proving efficiency is illustrated for the NPMLE in the univariate right-censored data model, the regularized MLE in the current status data model and for an implicit NPMLE based on a mixture of right-censored and current status data. Furthermore, a general algorithm for estimation of the limiting variance of the NPMLE is provided. This revised version was published online in July 2006 with corrections to the Cover Date.     

Consistency and Change in Children's Tattling on their Siblings: Children's Perspectives on the Moral Rules and Procedures of Family Life

Children's tattling on their siblings was observed in 39 families when children were 2- and 4- and 4- and 6-years of age. Tattling was more frequent among older siblings, and increased across time, despite a corresponding decrease in sibling transgressions against one another and an increase in parents' negative reactions to tattling. Tattling was largely truthful, implicit in form, and more likely to concern transgressions of what parents also regarded as more important standards. Among 4- and 6-year-olds, tattling was related to children's negative behaviour to one another and equally likely when children faced ongoing conflict issues and when they merely wished to inform parents of sibling wrongdoing. Parents generally allowed their children to tattle on one another, rarely reprimanded tattlers, but responded to the information contained in the tattlers' reports. The parents' responses were related to the quality of their children's tattling, but the children's tattling was unrelated to the likelihood that parents would react either positively or negatively to it. Results are discussed in terms of the place of tattling within the family system, with emphasis on the children's understanding of the implications of their parents' involvement in their own disputes.     

Effect of Sociocultural Context and Parenting Style on Scholastic Achievement among Iranian Adolescents

School grades, family demographics and responses to the parental authority questionnaire were assessed in 240 eighth‐grade students in the southern, central and northern parts of Tehran, Iran's capital. The result showed that poorer families with traditional values had more authoritarian attitudes toward parenting than richer families with more modern values. In contrast to the studies conducted in East Asian societies, the current study found that authoritative parenting was the style associated with the highest academic outcome. Tests of mediation and moderation effects showed that the relation between parenting style and academic outcome was independent of sociocultural context.     

德国关于电子电气设备的闭环供应链研究：一种生态效益计算方法

近来关于闭环供应链网络的文献中提出了两个重要问题：（1）如何制定平衡环境和经济效益的优化方案；（2）如何深刻理解二者间的效益背反关系。本文认为，针对环境和经济闭的效益边界及其背反关系进行全面探索，可以有效解决环境保护和经济发展中的效益平衡问题。为了解决求解效益边界的多变量问题，本文设计了一个针对目标函数中的数值进行指数计算的生态效益算法，并在德国电子电气设备闭环供应链设计中进行了实证研究。     

New Spatial Concepts Between Innovation and Lock-in: The Case of the Dutch Deltametropolis

It is often proclaimed that planning concepts serve an innovative function in the political process. They are praised as powerful tools that carry new insights and understandings into policy arenas. By examining the emergence and development of a new planning concept in the Dutch national spatial policy-making process, the deltametropolis concept, this paper questions this position. It argues that new spatial concepts tend to lose much of their innovative capacities when they enter the political arena and become encased in the traditional urban–rural planning discourse, thus reaffirming established planning orientations. The Dutch case of the deltametropolis illustrates that new spatial concepts may entail potential for innovation as much as for lock-in.     

Parental Influence on Friendships Between Native and Immigrant Adolescents

Parental influence on friendships between native (N = 5,683) and immigrant (N = 3,371) adolescents (aged ± 15) was investigated with the CILS4EU data of pupils in German and Dutch school classes (N = 446) and parents. The researchers examined whether parents affect friendships across group boundaries by shaping the structural opportunities to establish out‐group friends and their children's out‐group attitudes. The results show that if parents have more out‐group friends and if they consider it less important to maintain in‐group traditions, their children have more out‐group friends. Part of this relationship is mediated by children's out‐group attitudes. Some evidence is found that the opportunity structure mediates the relationship between parental characteristics and adolescent out‐group friendship.