Microcredit and Domestic Violence in Bangladesh: An Exploration of Selection Bias Influences

This article explores the relationship between women’s participation in microcredit groups and domestic violence in Bangladesh. Several recent studies have raised concern about microcredit programs by reporting higher levels of violence among women who are members. These results, however, may be attributable to selection bias because members might differ from nonmembers in ways that make them more susceptible to violence to begin with. Using a sample of currently married women from the 2007 Bangladesh Demographic Health Survey (BDHS) (N = 4,195), we use propensity score matching (PSM) as a way of exploring selection bias in this relationship. Results suggest that the previously seen strong positive association between membership and violence does not hold when an appropriate comparison group, generated using PSM, is used in the analyses. Additional analyses also suggest that levels of violence do not differ significantly between members and nonmembers and instead could depend on context-specific factors related to poverty. Members for whom a match is not found report considerably higher levels of violence relative to nonmembers in the unmatched group. The background characteristics of members and nonmembers who do not match suggest that they are more likely to be younger and from relatively well-to-do households.     

Motivating Operations in the Journal of Organizational Behavior Management: Review and Discussion of Relevant Articles

Every article published in the Journal of Organizational Behavior Management from 1982 through 2012 that contained the term motivating operation (or a related term) was examined. Seventy-six articles used a relevant term. Authors used the term in attempts to categorize and explain the behavioral effects of many aspects of interventions (e.g., rules, feedback, goal-setting), everyday occurrences in organizations (e.g., nicotine deprivation, top management support), and characteristics of behaving individuals (e.g., optimism, personality state), which on the one hand suggests that the motivating operation concept has been of value in organizational behavior management research as published in the journal. On the other hand, none of the articles demonstrated the successful use of a motivating operation as the term was initially defined, which suggests that the MO concept has been substantially expanded or widely misused by authors of the evaluated articles.     

Nonparametric quality control charts based on the sign statistic

Nonparametric control chart are presented for the problem of detecting changes in the process median (or mean), or changes in the process variability when samples are taken at regular time intervals. The proposed procedures are based on sign-test statistics computed for each sample, and are used in Shewhart and cumulative sum control charts. When the process is in control the run length distributions for the proposed nonparametric control charts do not depend on the distribution of the observations. An additional advantage of the non-parametric control charts is that the variance of the process does not need to be established in order to set up a control chart for the mean. Comparisons with the corresponding parametric control charts are presented. It is also shown that curtailed sampling plans can considerably reduce the expected number of observations used in the Shewhart control schemes based on the sign statistic.     

Estimation with the lognormal distribution on the basis of records

Record scheme is a method to reduce the total time on test of an experiment. In this scheme, items are sequentially observed and only values smaller than all previous ones are recorded. In some situations, when the experiments are time-consuming and sometimes the items are lost during the experiment, the record scheme dominates the usual random sample scheme [M. Doostparast and N. Balakrishnan, Optimal sample size for record data and associated cost analysis for exponential distribution, J. Statist. Comput. Simul. 80(12) (2010), pp. 1389–1401]. Estimation of the mean of an exponential distribution based on record data has been treated by Samaniego and Whitaker [On estimating population characteristics from record breaking observations I. Parametric results, Naval Res. Logist. Q. 33 (1986), pp. 531–543] and Doostparast [A note on estimation based on record data, Metrika 69 (2009), pp. 69–80]. The lognormal distribution is used in a wide range of applications when the multiplicative scale is appropriate and the log-transformation removes the skew and brings about symmetry of the data distribution [N.T. Longford, Inference with the lognormal distribution, J. Statist. Plann. Inference 139 (2009), pp. 2329–2340]. In this paper, point estimates as well as confidence intervals for the unknown parameters are obtained. This will also be addressed by the Bayesian point of view. To carry out the performance of the estimators obtained, a simulation study is conducted. For illustration proposes, a real data set, due to Lawless [Statistical Models and Methods for Lifetime Data, 2nd ed., John Wiley & Sons, New York, 2003], is analysed using the procedures obtained.     

Measuring urban sexual cultures

Gay neighborhoods across the United States are de-concentrating in today’s so-called “post-gay” era as sexual minorities assimilate into the mainstream and disperse across the city. This context creates a problem of measurement. If by “culture” we mean to say a particular way of life of a group or subgroup of people like sexual minorities, and if that way of life is blending with other aspects of the metropolis, then how can we detect distinct urban sexual cultures? In this article, I use 125 interviews with Chicago residents to propose a two-pronged strategy. First, gay neighborhoods continue to house anchor institutions, despite ongoing residential out-migrations. These are the primary engines of community building, and they locate the material culture of a group in a specific place. Commemorations serve as a second indicator for a culture, and they too put meanings into form. Although it is a fact of city life that all neighborhoods change, anchors and commemorations are analytic devices that scholars can use to observe urban sexual cultures. More generally, they provide a framework for how to measure the shifting geographic profile of a historically stigmatized group as it experiences positive change in public opinion.     

Malaysian researchers talk about the influence of culture on research misconduct in higher learning institutions

Based on a previous survey by the Office of Research Integrity (ORI) in the USA, a considerable number of foreign research scientists have been found guilty of research misconduct. However, it remains unclear as to whether or not cultural factors really contribute to research misconduct. This study is based on a series of interviews with Malaysian researchers from the local universities regarding their own professional experiences involving working with researchers or research students from different countries or of different nationalities. Most of the researchers interviewed agreed that cultures do shape individual character, which influences the way that such individuals conduct research, their decision-making, and their style of academic writing. Our findings also showed that working culture within the institution also influences research practices, as well as faculty mentorship of the younger generation of researchers. Given the fact such misconduct might be due to a lack of understanding of research or working cultures or practices within the institution, the impact on the scientific community and on society could be destructive. Therefore, it is suggested that the institution has an important role to play in orienting foreign researchers through training, mentoring, and discussion with regard to the “does” and “don’ts” related to research, and to provide them with an awareness of the importance of ethics when it comes to conducting research.