In portfolio selection models, uncertainty plays an important role. The parameter’s uncertainty leads to getting away from optimal solution so it is needed to consider that in models. In this paper we presented a two-stage robust model that in first stage determines the desired percentage of investment in each industrial group by using return and risk measures from different industries. One rea...

Objective: To determine the abnormal findings in the distal phalanx tuft of the hands (DPTH) in plain radiographs associated with the presence of rheumatoid arthritis (RA) in adults subjects. Methods: A systematic review was performed following the PRISMA guidelines using databases, such as, Medline, Embase, Bireme, Scielo, and Google Scholar. The main changes in the DPTH included erosion, reso...

background: these findings from several observational studies, investigated the association between red meat consumption and gliomas, were inconsistent. we conducted a systematic review and meta-analysis of observational studies to summarize available date on the relation between meat intake and risk of glioma. materials and methods: a systematic literature search of relevant reports published ...

The need for understanding the propagation mechanisms behind the recent financial crises lead the increased interest for works associated with systemic risks. In this framework, network-based methods have been used to infer from data the linkages between institutions (or companies. Part of the literature postulates that systemic risk is strictly related (if not equal) to systematic risk. In thi...

Firms scheduled to report earnings earn an annualized abnormal return of 9.9%. We propose a risk-based explanation for this phenomenon, in which investors use announcements to revise their expectations for non-announcing …rms, but can only do so imperfectly. Consequently, the covariance between …rm-speci…c and market cash-‡ow news spikes around announcements, making announcers especially risky....

Background Existing observational studies provide conflicting evidence for the causal effect of metformin use on cancer risk in patients with type-2 diabetes, and there are concerns about bias affecting a number of studies. Methods MEDLINE was used to identify observational studies investigating the association between metformin and overall or site-specific cancer in people with type-2 diabet...

In this paper, we present a systematic literature review in the field of IT Outsourcing with a focus on risk management. The source material of the review consists of 97 high quality journal articles published in 18 journals between 2001 and September 2008. Besides an analysis of related work, this review provides an overview of applied research methods and theories in the field of IT Outsourci...

In this paper, we present a systematic literature review in the field of IT Outsourcing with a focus on risk management. The source material of the review consists of 97 high quality journal articles published in 18 journals between 2001 and September 2008. Besides an analysis of related work, this review provides an overview of applied research methods and theories in the field of IT Outsourci...

BACKGROUND Triplet pregnancies are associated with a high risk of miscarriage and early preterm birth. It is uncertain if the outcome is improved by embryo reduction (ER). METHODS We examined trichorionic triplet pregnancies with three live fetuses at 10-14 weeks of gestation that were managed expectantly or by ER. The two groups were compared for the rates of miscarriage, defined as pregnanc...