The impact of emigration on national development in the Arab region: the case of the Yemen Arab Republic

"The focus of this article is the impact of emigration on national development in labor sending countries experiencing wide-scale emigration, the main contention being that, due to the characteristics of contemporary labor movements among Arab countries, there obtains a contradiction between short term benefits and long term adverse effects. The article briefly defines development, then presents empirical evidence from the Yemen Arab Republic of the negative impact of labor emigration."     

On the limiting properties of social indicators

Characteristics of the population and economic measures that constitute traditional social indicators are compared with more recent “quality of life” measures to demonstrate that social indicators are always value statements at the policy level. The possibility of alternative perspectives is illustrated. It is suggested that an awareness of the assumptions implicit in any given indicator is as important as the data they provide.     

世界保险业

世界保险业市场的保险费已连续几年超过 2 0 0 0 0亿美元 ,1997年还曾达到 2 12 90亿美元 ,较之 1996年实际增长 4.5 %。投向人寿保险较之财产保险的增幅大 ,如 1991年 ,人寿保险的比例为 5 3% ,6年以后该比例增至 5 8%。财产保险增长缓慢 (1997年实际只为0 .2 % ) ,因而使其所占比例下降的关键原因是最主要市场的剧烈竞争和过度设备能力。在日本、北美和西欧 ,该项价目不可能脱离业务规模的相应增大 ,由于受经济增长率的限制 ,致使这些地区收入量降低。相反 ,东欧、拉美和东南亚因业务规模扩大而使利润增加。从每个国家看 ,1997年保险收入…     

Moving and union dissolution

This paper examines the effect of migration and residential mobility on union dissolution among married and cohabiting couples. Moving is a stressful life event, and a large, multidisciplinary literature has shown that family migration often benefits one partner (usually the man) more than the other Even so, no study to date has examined the possible impact of within-nation geographical mobility on union dissolution. We base our longitudinal analysis on retrospective event-history data from Austria. Our results show that couples who move frequently have a significantly higher risk of union dissolution, and we suggest a variety of mechanisms that may explain this.     

Physician/hospital business relationships. Sorting through the options

Providers recognize the critical role of physician/hospital partnerships in the newly emerging health care delivery system. However, the possibilities available for establishing such partnerships can be overwhelming. The authors provide a critical review of the options for physician/hospital business relationships. They emphasize the need to match physician/hospital strategies to local market characteristics, develop market-based business objectives, and structure physician/hospital relationships to support the achievement of business objectives.     

解读政府工作报告关键数据

在第十一届全国人民代表第二次会议的政府工作报告中,温加宝总理八处提到信心,并列举若干数据,显示了政府的重要政策导向,值得关注。2009年国民经济和社会发展的主要预期目标是GDP增长8％左右,经济结构进一步优化。     

细胞培养-Taqman PCR分析法——评估小隐孢子虫消毒

小隐孢子虫(Cryptosporidium parvum)污染是对水工程的一个挑战也威胁到公众健康。在此项研究中,我们开发了一种细胞培养-定量PCR分析法来评估消毒后小隐孢子虫的活性。我们用这种方法对水工程中多种消毒法包括低压紫外光(LP-UV),臭氧,混合氧化剂(MIOX),氯气进行评估。证实该检测方法是可信和敏感的,最低能检测到一个感染卵囊。有效的卵囊消毒(灭活率>2 log10 units)是采用LP-UV(20 mJ/cm2)或2 mg臭氧/公升(10分钟)。MIOX和氯气消毒卵囊效果最差(灭活率<0.1 log10 unit)。这些结果证实了MIOX对小隐孢子虫消毒的无效性。该检测方法是对饮用水和循环水消毒系统有效的评估方法。