Supplying chain cooperation has already become an important strategy that enterprises use to tackle market competition; however, the supply chain crisis caused by supply chain risk makes the supply chain operation of enterprises very fragile. This paper applies Portfolio Theory to explain the suppliers’ combination plays an important role in dispersing the supplying chain risk and controlling i...

Unless otherwise noted, all fi gures are based in USD.

In the context of the historical development of portfolio theory the authors describe a stochastic asset/liability modelling exercise for a closed pension fund portfolio, illustrating the reduction in variance of estimated future surplus which can be achieved by investment in index-linked securities. Equity investment would increase the expected level of surplus, but the outcome would be more u...

Healthcare organizations continue to make large investments in health information technology to improve quality of care and lower costs. Therefore, there is an evergrowing need to have an ever-clearer understanding of how IT investments impact these organizations. In this paper, we present an extensive review of literature on the impact of health information technology on quality. We identify a...

Modern portfolio theory(MPT) addresses the problem of determining the optimum allocation of investment resources among a set of candidate assets. In the original mean-variance approach of Markowitz, volatility is taken as a proxy for risk, conflating uncertainty with risk. There have been many subsequent attempts to alleviate that weakness which, typically, combine utility and risk. We present ...

In principle, implementation of portfolio investment strategies through market orders at the NYSE open would be problematic because of execution price uncertainty. This paper measures the impact, by comparing the actual value at the end of the trading day against the value one would have obtained if it were possible to observe opening prices when submitting orders. For positively weighted portf...

We consider a group of mean-variance investors with mimicking desire such that each investor is willing to penalize deviations of his portfolio composition from compositions of other group members. Penalizing norm constraints are already applied for statistical improvement of Markowitz portfolio procedure in order to cope with estimation risk. We relate these penalties to individuals’ wish of s...