the purpose of this research is investigation of application of the arbitrage pricing theory and effect of unanticipated changes in a set of macroeconomic variables such as inflation rate, money supply, exchange rate, oil price, term structure and industrial production on expected security return in tehran stock exchange. in this research, data are analyzed quarterly for the period of 1997-2008...

In 2003 there were 8,665 transplants of deceased donor kidneys for the approximately 60,000 patients waiting for such transplants in the United States. While waiting, 3,436 patients died. There were also 6,464 kidney transplants from living donors (Scientific Registry of Transplant Recipients web site). Live donation is an option for kidneys, since healthy people have two and can remain healthy...

Deceased-donor and live-donor kidneys are the two sources for transplantation, and these sources are utilized via two different programs. One of these programs, a paired kidney donation (PKD), involves two donor-patient pairs, for each of whom transplantation from donor to intended recipient is not possible due to medical incompatibilities, but such that the patient in each couple could receive...

Kidney exchanges are organized markets where patients swap willing but incompatible donors. In the last decade, kidney exchanges grew from small and regional to large and national—and soon, international. This growth results in more lives saved, but exacerbates the empirical hardness of the NPcomplete problem of optimally matching patients to donors. State-of-the-art matching engines use intege...

abstract background: quality of life is a concept, which in recent years is considered as a measure for health in chronic diseases such as kidney diseases. complications of chronic diseases can affect the quality of life in children and their families over time. therefore, empowerment programs are necessary to improve their quality of life. this study aimed to investigate the impact of the fami...

We consider a model of Paired Kidney Exchange (PKE) with feasibility con-straints on the number of patient-donor pairs involved in exchanges. Patients’preferences are restricted so that patients prefer kidneys from compatible youngerdonors to kidneys from older donors. In this framework, patients with compati-ble donors may enroll on PKE programs to receive an organ with higher ...

Kidney exchange is a type of barter market where patients exchange willing but incompatible donors. These exchanges are conducted via cycles—where each incompatible patient-donor pair in the cycle both gives and receives a kidney—and chains, which are started by an altruist donor who does not need a kidney in return. Finding the best combination of cycles and chains is hard. The leading algorit...