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Type I multivariate Pólya-Aeppli distributions with applications
Geldenhuys, Claire; Ehlers, Rene; Bekker, Andriette, 1958- (Elsevier, 2026-03)
An extensive body of literature exists that specifically addresses the univariate case of zero-inflated count models. In contrast, research pertaining to multivariate models is notably less developed. We propose two new parsimonious multivariate models that can be used to model correlated multivariate overdispersed count data. Furthermore, for different parameter settings and sample sizes, various simulations are performed. In conclusion, we demonstrate the performance of the newly proposed multivariate candidates on two benchmark datasets, which surpasses that of several alternative approaches.
An international interdisciplinary commentary on the revised guidelines for music-based interventions checklist, elaboration guide and validation study
Magee, Wendy L.; Bhana-Pema, Varshika; Carr, Catherine E.; Ettenberger, Mark; Fancourt, Daisy; Garrido, Sandra; Kwan, Melanie; Lichtensztejn, Marcela; Marinho, Valeska; Sarkamo, Teppo; Sundar, Sumathy; Yoo, Ga Eul; Zhang, Jingwen (Oxford University Press, 2026-02)
No abstract available.
The regulation of terrorist online content in Africa : an overview of the applicable regional instruments and the legal frameworks of South Africa, Kenya and Nigeria
Mwale, Brenda Achieng (Routledge, 2026)
The rapid advancement in technology has made society increasingly dependent on information and communication technology (ICT). Unfortunately, this dependence has also created new opportunities for terrorist groups to use the Internet for their activities. Over the years, there has been a significant rise in terrorist online activity, with these groups using the Internet for various purposes, including the dissemination of terrorist content. This is particularly concerning for African countries, where Internet use by terrorist groups and dissemination of terrorist content is increasing. However, the complexity of regulatory measures within the continent due to diverse legal frameworks, as well as capacity and implementation challenges, complicate efforts to address this issue. In this context, this article explores how existing regional instruments and national laws address terrorist online content. It proposes a unified and multifaceted approach to improve the regulatory measures in Africa.
The modified Fréchet-exponentiated exponential distribution : novel model for reliability and survival analysis
Aga, Merga Abdissa; Dugasa, Shibiru Jabessa; Tadese, Habte; Chen, Ding-Geng (Din) (Wiley, 2026-01-21)
This study introduces a novel statistical model called the modified Fréchet-exponentiated exponential (MFrEE) distribution. The existing exponentiated exponential (EE) distribution, while useful for lifetime and reliability data, has limited flexibility in capturing diverse hazard shapes and may not adequately model extreme events or tail behavior. To address these limitations, the MFrEE distribution applies a modified Fréchet generator to the EE baseline, enhancing the model’s flexibility and robustness. Its survival and hazard functions, cumulative distribution function, and probability density function are derived, presented, and illustrated with plots for various parameter values. The study provides a comprehensive mathematical analysis of the distribution, deriving its moments, mean, variance, quantiles, and moment-generating function. Methodologically, the model is simulated using an accept–reject algorithm, and its parameters are estimated via maximum likelihood estimation (MLE). The performance of the estimators is assessed through Monte Carlo simulations using bias, mean squared error, and coverage probability (CP), with the CP results showing values close to the nominal 95% level across different parameter settings. Furthermore, the robustness and performance of the proposed method are evaluated using AIC, BIC, and AICc, demonstrating superior performance compared to baseline methods across three publicly available datasets. The study concludes by proposing this model as a significant contribution to probability theory and suggests two avenues for future research: applying the model to more real-world problems and using machine learning methods for parameter estimation to compare with the MLE approach used in this study.
Attributional sense-making of distrust in professional service firms : working in a coopetitive paradox
Abgeller, Neve; Saunders, Mark N.K.; Donnelly, Rory; Dobbins, Tony (Wiley, 2026-03)
Distrust is an inevitable yet often overlooked feature of relationships in professional service firms (PSFs), where simultaneous demands to collaborate and compete produce a coopetitive paradox shaping everyday organizational life. Drawing on 50 in-depth qualitative interviews using the critical incident technique, we examine how professionals attribute meaning to the development of distrust in their working relationships. The analysis identifies three recurring loci—readings of character and conduct (internal), signals from structures, processes, and cultures (external), and interactional cues in day-to-day exchanges (relational)—which often braid together into compound explanations for distrust that travel and endure. In high pressure, identity-sensitive PSFs, coopetition heightens this braiding, making small ambiguities easier to read as self-interest and harder to reverse. The study clarifies how distrust functions as an active, socially embedded process of meaning-making and why it proves so durable in coopetitive settings. PRACTIONER POINTS • Distrust often stems from how employees interpret colleagues' personal traits and motives, with perceived insecurity, self-interest, and ethical lapses driving negative attributions. • Competitive and ambiguous organizational environments in PSFs can amplify distrust, as structural and cultural pressures encourage self-protective behaviours. • Communication breakdowns, inconsistent information flows, and intuitive judgements about the intentions of colleagues can entrench distrust in working relationships. • Addressing distrust requires interventions at both relational and structural levels—balancing performance demands with transparency, collaboration, and consistent policy adherence. • Understanding that conflict is a structural feature of work relations, rather than being deviant or abnormal, should be the starting point for practitioners in understanding causes of distrust.