Number of Replications Required in Control Chart Monte Carlo Simulation Studies

Monte Carlo simulations have been used extensively in studying the performance of control charts. Researchers have used various numbers of replications in their studies, but almost none of them provided justifications for the number of replications used. Currently, there are no empirically based recommendations regarding the required number of replications to ensure accurate results. This research examined six recently published studies to develop recommendations for the minimum number of replications necessary to reproduce the reported results within a specified degree of accuracy. The results of this study indicated that using 10,000 replications was unnecessarily large and a smaller number of replications could be used to reproduce the target ARLs within the 2% error bands satisfying the modified Mundfrom's criteria. In many cases, only 5,000 replications or fewer were required. In general, the number of replications required to reproduce the target ARL decreased as the shift size increased. In addition, the results of this study provide general recommendations for the required number of replications to use in future SPC simulation studies.     

Testing the Equality of the Noncentrality Parameters of Two Noncentral t-Distributions with Identical Degrees of Freedom

The problem of testing the equality of the noncentrality parameters of two noncentral t-distributions with identical degrees of freedom is considered, which arises from the comparison of two signal-to-noise ratios for simple linear regression models. A test procedure is derived that is guaranteed to maintain Type I error while having only minimal amounts of conservativeness, and comparisons are made with several other approaches to this problem based on variance stabilizing transformations. The new procedure derived in this article is shown to have good properties and will be useful for practitioners.     

What about Rural Blight? Housing and Neighborhood Conditions in Southeastern Small Towns

Though the concept of blight clarifies housing and neighborhood changes in rural and small towns experiencing disinvestment and decline, the term is rarely examined outside of urban discourse. This study explores the extent of rural blight and its relationship to community characteristics using survey results from elected officials and staff members of small towns in one southeastern state. We examine the historical background of blight, including its connections to urban renewal, racial bias and stereotyping, and the broken windows theory. Among the small towns in the study, economic blight, particularly dilapidated housing, was prevalent. Social blight, which includes behaviors that are thought to be threatening or criminal in nature, was less common but correlated moderately with economic forms of blight. While social disorganization and collective efficacy theories link a range of demographic characteristics to physical and social disorder, our findings pointed only to a significant relationship between communities with a higher portion of the population who are black and multiple forms of extensive blight. More research is needed to understand the relationship, both observed and perceived, between economic and social blight in rural small towns and how these issues may be remediated through local collective action.     

Socioeconomic inequality and adjustments in children’s perceptions of their agency as they age in South Korea

This paper explores how children's perceptions of their agency, as something that is closely associated with its exercise, appear in relation to social structural factors, especially their socioeconomic positions, as they age. Using data from 862 10–18 years old in South Korea, we examine how children's expressed optimism about their ability to achieve their occupational choices can conceal the impact of structural factors on their ‘choices’ and dispositions for (non‐)action over time. Based on the findings, we argue for a more careful interpretation of children's sense of agency that recognises its propensity to continuously adjust in contexts of structural inequality.     

Social-ecological research in urban natural areas: an emergent process for integration

Urban Ecosystems - Understanding the structure and function of urban landscapes requires integrating social and ecological research. Here, we integrate parallel social and ecological assessments of...     

Framing Effects,Procedural Fairness,and the Nonprofit Managers’ Reactions to Job Layoffs in Response to the Economic Shock of the COVID-19 Crisis

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - The COVID-19 pandemic has challenged the viability and effectiveness of nonprofit organizations compelling them to make...     

Liberating the Archive,Emancipating Philanthropy: Philanthropic Archival Layering as a Critical Historical Approach for Researching Voluntary Action in Marginalized Communities

VOLUNTAS: International Journal of Voluntary and Nonprofit Organizations - Historical analysis of philanthropy and civil society is a valuable research method that provides useful assessments of...     

The Effects of Nonprofit Reputation on Charitable Giving: A Survey Experiment

A nonprofit’s reputation is a crucial intangible asset that can bring significant benefits to the organization. Using a multidimensional framework, this study tested the effects of three dimensions of nonprofit reputation—financial efficiency, media visibility, accreditation status—on charitable giving behavior. The findings of this 2 × 2 × 2 full-factorial survey experiment show that each of the reputation dimensions has a significant individual effect on giving behavior. Furthermore, financial efficiency and accreditation status have an interaction effect on giving behavior. The findings also demonstrate the cross-level interaction between financial efficiency and the real-life giving behavior of individuals and between accreditation and the real-life volunteering behavior. This study provides implications for our understanding of the components of nonprofit reputation and their impact on charitable giving.

     

The Evolution of Housing Typologies for Older Adults in The Netherlands From 1945 to 2016: An Analysis in the Context of Policy,Societal, and Technological Developments

This study aims to examine housing typologies for older adults in the light of three qualitatively examined exogenous factors: policy, societal developments, and technology. The developments in inpatient and assisted ambulatory housing facilities for older adults have been mapped from 1945 to 2016 using quantitative data. Using these data, five transition periods can be distinguished. Within the first transition periods, policy factors were tremendously important, while within the later ones, societal influence empowered by technological change became the primarily driving factor. This research shows that the classification of inpatient, assisted ambulatory housing, and outpatient housing may no longer be applicable in its current form.