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11.
Straubhaar T 《The International migration review》1992,26(2):462-483
"This article shows that an analysis of the impacts of immigration [in Western Europe] has to be divided into allocational and distributional aspects. From an allocational point of view, like free trade in goods, services and capital, migration is welfare-improving as long as marginal productivities of labor are not equalized worldwide. From a distributional point of view, however, the immigration society has to bear the effects of sharing its common public goods and its social values with the new immigrants. Free immigration will only be allowed if the allocational welfare gains exceed the distributional welfare losses. According to this rule of thumb, a guideline for an efficient migration policy is sketched." 相似文献
12.
Levina T 《Vestnik statistiki (Moscow, Russia : 1949)》1992,(1):10-15
Demographic trends in rural areas of the former Soviet Union are analyzed over the 10-year period 1979-1989, using census data. Over the whole country, the rural population decreased by 1 percent, while the urban population increased by 15 percent, although significant differences existed between the European and Central Asian republics. Factors affecting the dynamics of rural populations are analyzed, including the undeveloped social and economic infrastructure in rural areas. 相似文献
13.
Slaby T 《Wiadomo?ci statystyczne (Warsaw, Poland : 1956)》1986,31(8):12-13
The application of the subjective variable to research on attitudes toward fertility in Poland is considered. The variable concerns the determination of ideal family size and attitudes toward having more children. The author shows how an ex post facto variable was constructed, describing positive, negative, and neutral feelings toward fertility during the course of a study on attitudes toward procreation. 相似文献
14.
Montgomery MR Richards T Braun HI 《Journal of the American Statistical Association》1986,81(394):297-309
This study examines the possibility that estimation of the effect of breast-feeding on infant survival is affected by selection bias, in that children who are healthier at birth may be more likely to be breast-fed. Data are from the 1976 Malaysian Family Life Survey. "Ordinary logit models for breast-feeding and survival are estimated, and the results suggest that selection is indeed present. For example, children of higher birth weight appear to be more likely to be breast-fed and likely to survive. In addition, weight at birth and the duration of breast-feeding appear to be linked." Using birth weight as an indicator for the child's health, the authors conclude that "the direct influence of breast-feeding on survival remains of overwhelming importance even after corrections for selection bias are made." 相似文献
15.
16.
The impact of immigration on unemployment in Canada is examined for the period 1983-1985. The authors attempt to construct a balance sheet of immigration in terms of labor supply and demand. They conclude that immigrants create more jobs than they fill, and that their net effect on the employment situation is positive. (SUMMARY IN FRE AND SPA) 相似文献
17.
Saignes T 《Latin American population history newsletter》1987,(13):16-21
The author describes and evaluates some little-known sources of data on the Southern Andes for the period from the sixteenth to the eighteenth century. 相似文献
18.
不言而喻,研究人的前景,不可能不分析人的本质.所以,必须由之开始的第一件事,就是试着回答"什么是人"的问题.这真是个"永恒的"问题,它贯穿整个哲学史,在现代关于人及其未来的争论中也是一个中心问题.在对人的本质进行认识的历史上,已经取得了一些决定性的成果.在对科学、人类精神文化、人类社会经验加以发展的新阶段 相似文献
19.
Bodega I Cebrian JA Franchini T Lora-tamayo G Martin-lou A 《The International migration review》1995,29(3):800-819
"This study addressed the problem of the Moroccan immigration into Spain within the context of South-North movements, focusing on analyzing provisional data from the last immigrant regularization in the country completed during the end months of 1991." 相似文献
20.
Burn T 《Physician executive》1996,22(3):20-25
The purpose of this article is to outline the contrasts between the traditional AMC and an organization oriented toward the delivery of population-based managed care. Academic medical centers differ from one another considerably in the extent to which they serve as quaternary care community resources, the degree to which they emphasize primary care in training and care delivery, and the amount of research undertaken. Nor is there a single organizational structure for managed care; successful managed care is practices in IPAs, multispecialty groups, PHOs, and staff-model HMOs. Nonetheless, the contrasts outlined here between AMCs and managed care organizations (MCOs) are valid in most cases. 相似文献