-Railway signal system requires the high level of safety in order to safeguard safe operation of the train and people’s lives, so the risk analysis of railway signal system counts for much. However, due to the incomplete of the risk data, it is often impossible to obtain a satisfactory result. This article presents a comprehensive study in the risk analysis model of railway signal system on saf...

A new methodology for financial and insurance operational risk capital estimation is proposed. It is based on using the finite time probability of (non)ruin as an operational risk measure, under a general ruin probability model, according to which operational losses may have any joint (dependent) discrete or continuous distribution, and the function, describing the accumulation of risk capital ...

OBJECTIVE We aimed to examine maternal postpartum complications of twin deliveries according to mode of delivery and investigate the associated risk factors. METHODS This was a retrospective cohort review of twin pregnancies with delivery after 26 weeks at a tertiary teaching hospital (1993-2008). The rates of maternal postpartum complications were compared among vaginal, elective cesarean an...

Sorting, Incentives and Risk Preferences: Evidence from a Field Experiment The, often observed, positive correlation between incentive intensity and risk has been explained in two ways: the presence of transaction costs as determinants of contracts and the sorting of risk-tolerant individuals into firms using high-intensity incentive contracts. The empirical importance of sorting is perhaps bes...

Improving analyses of population exposure to potential natural hazards, especially sudden ones, requires more detailed geodemographic data. Availability of such information for large areas is limited by specific database requirements and their cost. This paper introduces and tests a new approach for refining spatio-temporal population distribution at high resolution by combining diverse geoinfo...

We consider certificate revocation from three high-level perspectives: temporal nonmonotonicity, user interfaces, and risk management. We argue that flawed understanding of these three aspects of revocation schemes has caused these schemes to be unnecessarily costly, complex, and confusing. We also comment briefly on some previous works, including those of Rivest [16], Fox and LaMacchia [5], an...

We examine the impact of adding a value-at-risk (VaR) constraint to the problem of an active manager who seeks to outperform a benchmark while minimizing tracking error variance (TEV) by using the model of Roll [1992. A mean/variance analysis of tracking error. Journal of Portfolio Management 18, 13–22]. We obtain three main results. First, portfolios on the constrained mean-TEV boundary still ...

Financial risks can be broadly classified into several categories, namely market risk, credit risk, liquidity risk, operational risk, and legal risk [1]. Market risk is the risk of loss arising from changes in the value of tradable or traded assets. Credit risk is the risk of loss due to the failure of the counterparty to pay the promised obligation. Liquidity risk is the risk of loss arising f...