In this article, a new reciprocal Rayleigh extension called the Xgamma reciprocal Rayleigh model is defined and studied. The relevant statistical properties are derived, and the useful results related to the convexity and concavity are addressed. We discussed the estimation of the parameters...

Celtel is dedicated to making life better. In our eyes this means ensuring a sustainable business to continue the infrastructure investment essential to Africa's development. And it means doing so in a fully transparent manner, including publishing what we pay to Governments and state-owned...

In this article, a new reciprocal Rayleigh extension called the Xgamma reciprocal Rayleigh model is defined and studied. The relevant statistical properties are derived, and the useful results related to the convexity and concavity are addressed. We discussed the estimation of the parameters...

PurposeIn light of the growing interest in corporate social responsibility (CSR), there is still controversy regarding its impact on firms’ performance. In this paper, we examine the effects of CSR initiatives, as a marketing investment on firms’ performance. Our study provides valuable...