Diagnostics for the bootstrap and fast double bootstrap

ABSTRACT

The bootstrap is typically less reliable in the context of time-series models with serial correlation of unknown form than when regularity conditions for the conventional IID bootstrap apply. It is, therefore, useful to have diagnostic techniques capable of evaluating bootstrap performance in specific cases. Those suggested in this paper are closely related to the fast double bootstrap (FDB) and are not computationally intensive. They can also be used to gauge the performance of the FDB itself. Examples of bootstrapping time series are presented, which illustrate the diagnostic procedures, and show how the results can cast light on bootstrap performance.     

‘Environment’ Submissions in the UK's Research Excellence Framework 2014

There has been much debate about university research assessment exercises. In the UK, a major element of the 2014 Research Excellence Framework (REF2014) has been the research environment. Here we analyse 98 REF2014 ‘environment’ submissions in Business and Management Studies. We explore whether there are distinctive language‐related differences between submissions of high and low ranked universities and conclude that submission writers have a strong incentive to exaggerate strengths and conceal problems. In addition, innate biases such as the ‘halo’ and ‘velcro’ effects may distract the attention of assessors from a submission's strengths and weaknesses, since they are likely to influence their pre‐existing impressions. We propose several changes to improve how environment is evaluated. We also argue that the research environment would be more likely to be enhanced if the number of outputs submitted in future was an average of two and a maximum of four per academic, rather than the maximum of five currently being considered.     

Geographies in the American DeafWorld as institutional constructions of the deaf body in space: the sensescape model

Space is a site where culture and body meet. It is a physical text of cultural constructions of the body that articulate personal, social and material functions and arrangements. The American DeafWorld consists of spaces where deaf and hard of hearing people are found. The geographies in the DeafWorld are the sites where different institutions create and imprint their ideologies, practices and properties pertaining to their sensory notions of the deaf body onto brick-and-mortar spaces in the DeafWorld. Sensescape is proffered as a theoretical model to describe DeafWorld institutional geographies.     

Ambivalent Homoprejudice towards Gay Men: Theory Development and Validation

ABSTRACT

Myriad social groups are targets of hostile and benevolent (i.e., ambivalent) prejudice. However, prejudice toward gay men is typically conceptualized as hostile, despite the prevalence of benevolence toward gay men in popular media. This article aims to compare gay men with other targets of ambivalent prejudice (i.e., women and elderly people) and draw on the stereotype content and microaggressions literatures in order to develop a theory of ambivalent homoprejudice. The resultant framework, comprising repellent, adversarial, romanticized, and paternalistic homoprejudice was investigated using seven focus groups of heterosexuals and gay men (N = 22), and the findings were consistent with stereotype content theory. Directions for future research into the deleterious effects of ambivalent homoprejudice and possible empowering interventions are discussed.     

Correction to: Disparities in Healthcare Utilization Among Adults with Obesity in the United States,Findings from the NHIS: 2006–2015

Population Research and Policy Review - In the original publication of the article the Table 1 header has been switched. The corrected Table is provided in this correction article.     

Socializing the Silent Treatment: Parent and Adult Child Communicated Displeasure,Identification, and Satisfaction

Responding to evidence that the silent treatment is a relational-harming means of communicating disappointment in interpersonal relationships, this study focused on the silent treatment’s role and transmission within the family. Adult children’s (N = 182) self-reported silent-treatment behaviors were negatively related to their own self-esteem, and the satisfaction they reported for their primary parent was negatively related to that parent’s silent treatment. The parent’s admitting displeasure, however, was positively related to this satisfaction and positively associated with the child’s feelings of control. Revealed sex differences were minor and outside of gendered expectations for communicating disappointment. In testing parent socialization of the silent treatment, parent silent-treatment use was positively associated with the adult child’s silent-treatment use, with no demonstrated mediation by parent identification.     

The Practicalities and Perils of Ambulatory Assessment's Promise: Introduction to a Special Section

Ambulatory assessment (AA) offers one of the most exciting approaches for opening the dynamic “black box” of adolescents’ daily lives. In this introduction, we spotlight AA's surprisingly restricted market share within adolescent scholarship. We describe thorny challenges these intense methods can pose when conducting adolescent research “in situ” and underscore that capturing quality AA data means placing adolescents’ developmental stage at the forefront. The novel research reported in this special section speaks to these challenges and underscores the promise of AA for conducting developmentally salient science. The nine articles included in the section span multiple disciplines (Sociology, Psychology, Public Health) and reflect diverse viewpoints, approaches, and theories. All provide multiple novel best‐practice strategies for conducting AA scholarship with adolescents.     

Coordinated Replenishments from a Common Supplier

Coordinated replenishment strategies may be implemented by jointly ordering multiple items from a common supplier. A major benefit of coordinated replenishment is that it increases the size of shipments, permitting the buyer to enjoy transportation economies without a major increase in average inventory levels. The coordinated replenishment problem is complex because side constraints govern the attainment of transportation rate breaks. The problem is further complicated by the presence of purchase quantity discount opportunities. Thus, the buyer must decide which items to order independently, which items to include in a group order, and the order quantities of each item, governed by the frequency of independent or group orders. We present a mathematical model and a heuristic solution procedure that provide analytical support to the buyer seeking to minimize total costs of replenishing multiple items from a common supplier. The relevant costs are purchase prices, ordering costs, holding costs, and transportation costs. Coordinated replenishment provides nearly a 30 percent reduction in controllable costs relative to independent control. Experimentation with the heuristic has yielded optimal solutions over 88 percent of the time. When optimality was not obtained, the mean penalty was much less than one percent. The average heuristic search was more than two orders of magnitude faster than branch and bound, even for small problems, and possessed a much tighter distribution around the mean search time.     

Notes and Communications A NON-DUAL APPROACH TO SENSITIVITY ANALYSIS—THE RIGHT-HAND-SIDE CASE

Linear programming and sensitivity analysis in linear programming have long been integral parts of business school curricula, both at the undergraduate and graduate levels. Most business school students are required to take an introductory course in management science emphasizing linear programming and sensitivity analysis. This note is educational and presents a non-dual approach to restoring the optimal solution to a linear program when changes in the right-hand-side vector render the current solution infeasible and thus nonoptimal.     

The More the Merrier? Multiple Parent‐Adult Child Relations

Although parent‐adult child ties are generally positive, most parents have multiple children whose relations may yield collective ambivalence combining higher and lower quality. Little research has investigated these multiple relations. NSFH respondents aged 50+ with adult children (N = 2,270) are used to assess patterns of quality and contact across multiple children in the same family. This illuminates mixed experiences, especially for lowest quality and contact across children, contributing to collective ambivalence in parent‐adult child relations within families. Having more children increases prevalence of both positive and negative relations. Stepchildren exhibit more negative relations than nonstepchildren, even in the same family. Mothers have more positive but not more negative relations than fathers, but mothers have more negative relations with stepchildren.