Efficient Kidney Exchange with Dichotomous Preferences

This paper studies a general kidney exchange model with compatible patient-donor pairs, incompatible patient-donor pairs, single donors, and patients on the waiting list. We derive an explicit formula of the maximal number of feasible kidney transplants under several sizes of cycles and chains of exchange, analyze the effect of different ways of exchange on efficiency, and provide substantial simulation results based on the USA data. Our results further show that kidney exchange can be decentralized for relatively large populations, and that allowing compatible pairs and single donors to exchange with incompatible pairs can significantly increase the number of feasible kidney transplants. A more general model of two-category type-compatible exchanges is also established.     

Personal belief exemptions for school-entry vaccinations,vaccination rates,and academic achievement

Nonmedical exemptions from school-entry vaccine mandates are receiving increased policy and public health scrutiny. This paper examines how expanding the availability of exemptions influences vaccination rates in early childhood and academic achievement in middle school. We leverage 2003 legislation that granted personal belief exemptions (PBE) in Texas and Arkansas, two states that previously allowed exemptions only for medical or religious regions. We find that PBE decreased vaccination coverage among Black and low-income preschoolers by 16.1% and 8.3%, respectively. Furthermore, we find that those cohorts affected by the policy change in early childhood performed less well on standardized tests of academic achievement in middle school. Estimated effects on test scores were largest for Black students and economically disadvantaged students.     

An eye toward the future: Pressing questions for our discipline in today's academic and research climate

This paper seeks to open a dialogue concerning the current trend in hiring non-nurse faculty (NNF) to tenure track positions in schools/colleges of nursing. The evolution of non-nurses as faculty, including a review of contemporary papers in affecting this trend, is offered. Three means of involving non-nurses in advancing our discipline are presented. The impact of the growing trend of NNF is discussed relative to the integrity of our discipline and effects on education. We conclude by suggesting a manner of proceeding and raise questions for furthering dialogue.     

Sleeping money: investigating the huge surpluses of social health insurance in China

The spreading of social health insurance (SHI) worldwide poses challenges for fledging public administrators. Inefficiency, misuse and even corruption threaten the stewardship of those newly established health funds. This article examines a tricky situation faced by China’s largest SHI program: the basic health insurance (BHI) scheme for urban employees. BHI accumulated a 406 billion yuan surplus by 2009, although the reimbursement level was still low. Using a provincial level panel database, we find that the huge BHI surpluses are related to the (temporarily) decreasing dependency ratio, the steady growth of average wages, the extension of BHI coverage, and progress in social insurance agency building. The financial situations of local governments and risk pooling level also matter. Besides, medical savings accounts result in about one third of BHI surpluses. Although these findings are not causal, lessons drawn from this study can help to improve the governance and performance of SHI programs in developing countries.     

论新形势下促进大学生就业的体制机制创新

高校毕业生是国家宝贵的人力资源,做好毕业生就业工作,是贯彻落实党的十七大精神,全力推进人力资源强国建设的神圣职责和光荣使命。为此,必须把高校毕业生就业摆在就业工作的首位,切实制定积极有效的改革措施,进一步加强统筹协调,创新体制机制,强化协调配合,全力以赴解决好高校毕业生就业问题。