Bayes Estimation of Shift Point in Normal Sequence and Its Application to Statistical Process Control

A sequence of independent observations X ₁, X ₂, …, X _m , X _m+1, …, X _n was observed on some measurable characteristic X in statistical process control. The shift in process mean is reflected in the sequence after X _m . The Bayes estimators of shift point m, and past and future process means, μ₁ and μ₂, are derived using various priors and loss functions. An application in statistical process control is given and a simulation study of the estimators is carried out.     

Motivating Participation: The Symbolic Effects of Latino Representation on Parent School Involvement*

Objective. Decades of research suggest that parental involvement is vital for positive student academic achievement and thus one often‐proposed solution to alleviate the poor educational outcomes of minority students is to increase their parents' participation in school. Building on a psychological motivation argument, I investigate how the symbolic effects of minority representation impact minority parent involvement. Method. I test my hypotheses with original survey data from 324 Latino parents in Chicago. Results. My analysis suggests that, as hypothesized in the symbolic representation literature, Latinos in positions of power within schools send important heuristic cues to Latino parents that change their orientations to participation and ultimately manifest as increased school involvement. Conclusions. These results support education policies that attempt to increase the minority presence in schools at the administrative and governance levels, and highlight the need for greater enforcement of current diversity requirements under NCLB.     

On the choice of optimality criteria in comparing statistical designs

We formulate in a reasonable sense a class of optimality functionals for comparing feasible statistical designs available in a given setup. It is desired that the optimality functionals reflect symmetric measures of the lack of information contained in the designs being compared. In view of this, Kiefer's (1975) universal optimality criterion is seen to rest on stringent conditions, some of which can be relaxed while preserving optimality (in an extended sense) of the so-called balanced designs.     

The Experiences of Sleep Disruption in Families of Technology‐dependent Children Living at Home

This paper examines the sleep disruption experienced by 36 families of technology‐dependent children living at home in the United Kingdom. The paper begins with an overview of the qualitative study in which parents' experiences of sleep disruption emerged as a major theme. We then describe the nature of and reasons for the sleep disruption, the help families received with care overnight, and the effects of sleep disruption on parents in particular. This is followed by discussion of the implications of the findings for policy and practice as well as future research.     

Pakistani workers in the Middle East: volume,trends and consequences

The migration of workers from Pakistan to the Middle East is examined. Both the positive and negative aspects of this migration for the country of origin are considered. The study is based on secondary data from published sources.     

Value relevance of advertising expenditure: A review of the literature

This paper presents a review of the relevant empirical literature on advertising value relevance. The current dominant accounting practice is to treat advertising as a current period expense. There has been growing evidence, however, to suggest that advertising should be viewed as an investment in long‐term brand equity. While the primary focus is on the valuation studies of advertising expenditure, the paper also provides an overview of various other studies that relate advertising to profitability or sales of the firm or industry to investigate the effects of advertising expenditure. As a consequence, it is emphasized that there has been a recent shift to the use of valuation models in exploring the nature of advertising expenditure. Since market value captures both the current and future profitability effects of advertising, valuation models are often seen as a better alternative in exploring the intangible nature of advertising expenditure. It is found that the bulk of evidence on advertising value relevance comes from the US, where there has historically been greater disclosure of advertising expenditure. There appears to be little evidence on this matter in the UK, however. This may largely be attributed to the lack of advertising data availability in the UK.     

Regional disparities in Indonesia: A social indicators approach

The paper examines the nature of regional imbalance in Indonesia by using a number of social indicators. Several disaggregated social indices are constructed with the help of a taxonomic technique. For the purpose of comparison, an overall economic index is also constructed. It is observed that the ranking of provinces differ substantially across the indices, implying that there is no causal relationship between the selected social and economic indicators. Regional disparities declined in the past decade in terms of all social indices except the demographic index. Economic inequality nowever increased between 1970 and 1980.     

Measures of discrimination for latent group-based trajectory models

In clinical research, patient care decisions are often easier to make if patients are classified into a manageable number of groups based on homogeneous risk patterns. Investigators can use latent group-based trajectory modeling to estimate the posterior probabilities that an individual will be classified into a particular group of risk patterns. Although this method is increasingly used in clinical research, there is currently no measure that can be used to determine whether an individual's group assignment has a high level of discrimination. In this study, we propose a discrimination index and provide confidence intervals of the probability of the assigned group for each individual. We also propose a modified form of entropy to measure discrimination. The two proposed measures were applied to assess the group assignments of the longitudinal patterns of conduct disorders among young adolescent girls.     

COVID-19 and threats to irregular migrants in Kuwait and the Gulf

Prior to the COVID-19 Pandemic, the Gulf region was home to ~29 million foreign residents, an estimated 20–40% of whom were residing there in an irregular status. Most of them had skilfully devised strategies to survive in this irregular situation, with friends and relatives acting as essential support networks. The COVID-19 Pandemic suddenly disrupted this well-established social order. This article outlines the lived experiences of 26 irregular migrants residing in Kuwait when the Pandemic occurred. Twelve of our interviewees were planning to leave in response to the amnesty declared on 1 April, while 14 were planning to stay or were uncertain. Network support continued to provide an essential element in enabling their survival. Intermediaries such as kafeels (sponsors) were often unavailable or unwilling to provide assistance. The health and welfare of irregular migrants require special policy attention since they now face an enhanced risk of being apprehended and deported.