in this paper, we introduce fractional order of a planar fractional prey-predator system with a nonmonotonic functional response and anti-predator behaviour such that the adult preys can attack vulnerable predators. we analyze the existence and stability of all possibleequilibria. numerical simulations reveal that anti-predator behaviour notonly makes the coexistence of the prey and predator po...

Accountable care organizations (ACOs) are a promising payment model aimed at reducing costs while also improving the quality of care. However, there is a risk that vulnerable populations may not be fully incorporated into this new model. We define two distinct vulnerable populations, clinically at-risk and socially disadvantaged, and we discuss how ACOs may benefit each group. We provide a fram...

Health Affairs is a multidisciplinary, peer-reviewed journal dedicated to the serious exploration of domestic and international health policy issues. Health Affairs (ISSN: 0278-2715, electronic ISSN: 1544-5208) is published monthly by Project HOPE, 7500 Old Georgetown Road, Suite 600, Bethesda, MD 20814-6133. ©2014 by Project HOPE — The People-to-People Health Foundation, Inc. Periodicals-class...

This overview discusses articles published in this issue of the Health Care Financing Review, entitled "Health Care Needs of Vulnerable Populations." Articles cover the following vulnerable population subgroups: pregnant women and children, persons with AIDS, the disabled, and the elderly. Issues covered in this collection include: expenditures, demographic factors, Medicaid and Medicare policy...

OBJECTIVES The objective of this study was to explore the trade-offs society and payers make when expanding treatment access to patients with chronic hepatitis C virus (HCV) infection in early stages of disease as well as to vulnerable, high-risk populations, such as people who inject drugs (PWID) and HIV-infected men who have sex with men (MSM-HIV). METHODS A discrete time Markov model simul...