The objective of this study is to examine the portfolio theory that suggests that diversification can potentially reduce the return variance and the probability of failure of a portfolio. The current study is to investigate the diversification measure by means of Hershman-Herfindahl index, and applies the " diversification index " proposed by Demsetz & Strahan (1997) by scaling systematic risk ...

Background: Various prediction models have been developed aiming to estimate risk-adjusted mortality, morbidity and length of intensive care unit stay following cardiac surgeries. The European system for cardiac operative risk evaluation II (EuroSCORE II) is a prediction model which maps 18 predictors to a 30-day post-operative risk of death. The objective of this study was to evaluate the perf...

This is the initial publication on Concept Calculus, which establishes mutual interpretability between formal systems based on informal commonsense concepts and formal systems for mathematics through abstract set theory. Here we work with axioms for "better than" and "much better than", and the Zermelo and Zermelo Frankel axioms for set theory.

Several ̄rms use historical returns to rate or rank the performance of mutual funds, for the bene ̄t of individual investors desiring to invest in one or more of them. Because the past will not exactly repeat itself, such ratings re°ect di®erent notions of \risk" faced by investors. This paper describes and analyzes the performance measures employed by some advisory ̄rms. Approximations are deri...

Access to timely, risk-adjusted measures of transplant center outcomes is crucial for program quality improvement. The cumulative summation technique (CUSUM) has been proposed as a sensitive tool to detect persistent, clinically relevant changes in transplant center performance over time. Scientific Registry of Transplant Recipients data for adult kidney and liver transplants (1/97 to 12/01) we...

To reduce the high failure rate of software projects, managers need better tools to assess and manage software project risk. As a way to build such resources, on the other hand, details programs analysts must remainder create a better knowledge of the particular measurements of software package project risk as well as how they may have an impact on task performance. Development in this area con...

This research introduces a new mixed-integer nonlinear goal program (MINLGP) with branch and bound constraints and a separable programming foundation. The motivation for creating the MINLGP algorithm is to advance the ability of portfolio managers facing multiple and hierarchical goals to simultaneously solve for an efficient portfolio with an optimal number of contingent claim contracts in ord...