The main purpose of this paper is to investigate the performance of Nigerian insurance companies using Data Envelopment Analysis (DEA). Because of the unavailability of the required data, the study is limited to ten Nigerian insurance companies for the period of five years from 2008 to 2012. The input employed were commission expenses and management expenses, while premium and investment income...

A Bayesian statistical model to simultaneously characterize two or more social networks defined over a common set of actors is proposed. The key feature the hierarchical prior distribution that allows user represent entire system jointly, achieving compromise between dependent and independent networks. Among others things, such specification provides an easy way visualize multilayer network dat...

This work considers a problem of integrating heterogeneous semi–structured data sources with the purpose of estimating integration quality (IQ). During the integration of such data sources the IQ estimation plays an important role, because correspondences and dependencies within and across the sources are not completely known, the schema or semantics might be missing, which leads to results wit...