Reliability estimation in multicomponent stress–strength model for Topp-Leone distribution

In this paper, we consider the estimation reliability in multicomponent stress-strength (MSS) model when both the stress and strengths are drawn from Topp-Leone (TL) distribution. The maximum likelihood (ML) and Bayesian methods are used in the estimation procedure. Bayesian estimates are obtained by using Lindley’s approximation and Gibbs sampling methods, since they cannot be obtained in explicit form in the context of TL. The asymptotic confidence intervals are constructed based on the ML estimators. The Bayesian credible intervals are also constructed using Gibbs sampling. The reliability estimates are compared via an extensive Monte-Carlo simulation study. Finally, a real data set is analysed for illustrative purposes.     

Extreme value index estimator using maximum likelihood and moment estimation

ABSTRACT

When a distribution function is in the max domain of attraction of an extreme value distribution, its tail can be well approximated by a generalized Pareto distribution. Based on this fact we use a moment estimation idea to propose an adapted maximum likelihood estimator for the extreme value index, which can be understood as a combination of the maximum likelihood estimation and moment estimation. Under certain regularity conditions, we derive the asymptotic normality of the new estimator and investigate its finite sample behavior by comparing with several classical or competitive estimators. A simulation study shows that the new estimator is competitive with other estimators in view of average bias, average MSE, and coefficient of variance of the new device for the optimal selection of the threshold.     

On the convergence of some adaptive estimation procedures

In the paper we consider some adaptive procedures for estimating the unknown parameters of autoregressive and moving average processes. In case of AK(p) and MA(1) processes sequences of estimators converging with probability one and In mean square are given     

Firm-nonprofit collaboration: Explaining the rationale behind firms’ cross-sector partner choices

Cross-sector partnerships between firms and nonprofit organizations (NPOs) are emerging at an unprecedented rate to address sustainability issues. Extant research on cross-sector partnerships explains the firms' motivations to engage in partnerships but little is known about what drives the firms' partner choice. We build on firm-firm alliance research, differentiating between network-reinforcing and network-broadening strategies for finding partners. Based on a qualitative study with 33 experts from 17 frontrunner companies and 14 partnering NPOs, as well as secondary data, we assess the trade-offs between these two strategies and explore firms’ partner search and selection decisions. We advance cross-sector partnership research by proposing three drivers to explain why firms in our sample preferred to reinforce (rather than to broaden) their networks when forming additional cross-sector partnerships for sustainability. Moreover, we propose two conditions to explain why frontrunner firms often rely on opportunity-driven (rather than search-driven) partnership formation. These insights shed light on the type of formation strategy used in the context of cross-sector partnerships for sustainability.     

Guiding Change: Using Motivational Interviewing Within Organizations

Gruppe. Interaktion. Organisation. Zeitschrift für Angewandte Organisationspsychologie (GIO) - This contribution to the journal “Gruppe. Interaktion. Organisation. (GIO)” portraits...     

Handle with care! How majority cues can reduce the negative effects of warnings of foreseeable product failures

Review of Managerial Science - To ensure full effectiveness of several goods, suppliers have to instruct consumers to handle these products in a careful way. In other words, they have to warn of...     

Big Five Personality Factors Among Men With a Sexual Interest in Children

Men with a sexual interest in children or adolescents have been described as less extraverted, conscientious, and emotionally stable than controls. Yet, such studies have mostly been conducted in forensic institutions. To test whether such findings generalize to community samples, we assessed personality profiles of 123 German-speaking men with and 89 men without pedohebephilia online, using the Big Five Inventory-25. Our results indicate that men with pedophilia or hebephilia are less emotionally stable and extraverted but more conscientious than controls. We discuss study limitations and potential causes for differences in personality among community samples of men with and without pedohebephilia.     

From zero-sum to win-win - Organisational conditions for successful shared value strategy implementation

The number of publications on shared value strategies (SVSs) is continuously increasing. Literature does not answer the question which organisational conditions are necessary and which conjunctions of conditions are sufficient for the successful implementation of SVSs. This research aims at filling the gap by condensing empirical evidence found in the literature on successful SVSs, stakeholder management, corporate social responsibility, and positive social change. The article synthesises the findings of these streams of research into a set-theoretical framework and proposes five complex conditions necessary for successful SVS implementation: shared value-oriented entrepreneurial vision, strategic alignment (STA), shared value-oriented innovation (SVI), networking capabilities (NCs), and impact monitoring. Additional empirical evidence from cases claiming successful implementation of SVS allows the suggestion of several simple conditions constituting the complex conditions. Qualitative comparative analysis can be used for empirically testing the necessity of the suggested conditions and the sufficiency of conjunctions of complex conditions for SVS implementation success. The proposed framework enhances theoretical knowledge concerning successful SVS implementation and is an important step to support management efforts in reorienting their companies from zero-sum strategies to win-win SVSs.