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排序方式: 共有138条查询结果,搜索用时 15 毫秒
31.
32.
Individual-level sterility: A new method of estimation with application to sub-saharan Africa 总被引:1,自引:0,他引:1
This paper extends work on measures of population proportions sterile to propose a new estimator of an individual woman's age at sterility and consequently her sterility status at given ages. Accuracy and reliability, examined in a simulation study, appear satisfactory. From World Fertility Survey data for five African countries, the proportions sterile by age estimated by the individual measure and by the population estimator are almost identical. Cameroon and Kenya show substantial variation in prevalence and incidence of sterility across ethnic groups and by number of marriages. Unexpectedly, the evidence suggests that sterility increased from 1960 on in Kenya and remained unchanged in Cameroon. 相似文献
33.
Scott Cummings Lenora Finn Paradis Cheryl Neal Alatriste James Cornehls 《Population research and policy review》1988,7(2):159-188
This paper critically examines various approaches to community development in Mexican squatter settlements. Using a quasi-experimental design, the authors show systematic differences between government-sponsored and spontaneous squatter communities. Results suggest that residents in the non-government squatter settlement are not disadvantaged in their ability to construct adequate housing or to obtain resources similar to those living in government-sponsored communities. Government-sponsored settlements, however, showed significantly higher levels of collective action and community building than those that were spontaneously formed. The authors conclude with suggestions for improving the social and physical conditions of squatters. 相似文献
34.
Fjalar Finnäs 《Revue europeenne de demographie》1988,4(2):145-156
This paper gives a formal expression for the demographic effect of mixed marriages; i.e., the effect on the number of children, and thereafter illustrates the long-term effects of these marriages with a simple simulation model 相似文献
35.
36.
Peter D. Ørberg Jensen Marcus M. Larsen Torben Pedersen 《Journal of International Management》2013,19(4):315-323
Offshoring can be defined as the relocation of organizational tasks and services to foreign locations. At the same time as the scale and scope of offshoring have reached unprecedented levels in recent years, firms have increasingly been exposed to the challenges relating to managing an organization consisting of a number of offshored activities. In this special issue introduction paper, we argue that an organizational design perspective on offshoring can benefit research and practice in understanding how firms can coordinate and integrate offshoring activities. Specifically, we argue that offshoring implies an organizational reconfiguration consisting of three stages: disintegration, relocation and reintegration. We discuss the implications of this perspective and outline a research agenda. 相似文献
37.
A sample of people aged 40–67 years, taken from a longitudinal register compiled by Statistics Finland, is used to analyse mortality differences between Swedish speakers and Finnish speakers in Finland. Finnish speakers are known to have higher death rates than Swedish speakers. The purpose is to explore whether labour-market experience and partnership status, treated as proxies for measures of variation in health-related characteristics, are related to the mortality differential. Persons who are single, disability pensioners, and those having experienced unemployment are found to have substantially higher death rates than those with a partner and employed persons. Swedish speakers have a more favourable distribution on both variables, which thus notably helps to reduce the Finnish–Swedish mortality gradient. A conclusion from this study is that future analyses on the topic should focus on mechanisms that bring a greater proportion of Finnish speakers into the groups with poor health or supposed unhealthy behaviour. 相似文献
38.
This paper proposes a convolution model of fecundability, controling for the effects of postpartum amenorrhea and unobserved heterogeneity in fecundability. Simulation analysis was used to assess the validity and reliability of estimates derived from the model. Analysis showed that the model captured the mean and standard deviation of age at the onset of sterility in simulated populations where sterility followed either a Gompertz, a gamma, or a lognormal distribution. The model performed well when sterility was specified by either a lognormal or a gamma distribution. The model also accurately estimated fecundability and postpartum amenorrhea. Next, the model was found to fit data from 17th and 18th century French Canadian birth histories. In this French Canadian sample the mean age at sterility was found to be 46.3 years using a gamma model. The decline in fecundability was almost linear after age 30. Thus, fecundability at age 40 had declined to about one‐third of that observed at age 30. Variability in individual fecundability was quite high. For example, women with fecundability one standard deviation above the mean had about 2.3 times as high fecundability as women one standard deviation below the mean. 相似文献
39.
Finn Mackay 《Journal of lesbian studies》2019,23(3):397-409
AbstractThis article presents empirical data from survey research into lesbian and queer masculinities in the United Kingdom, conducted in 2017, which garnered over two hundred responses. Dominant themes emerged which addressed the differences between the sexed body and gender identity; the contradictions of identifying with masculinities while critiquing hegemonic masculinity; a sense of anxiety or loss around a perceived decline of lesbian community and identities within it, particularly the identity of butch lesbian; and, finally, the variety of trans identities and how they are defined and distinct. The focus in this article is on the latter theme, the variety of trans identities, and particularly the shared experiences of individuals across different identifications. Namely, I consider how butch, non-binary, and queer individuals reported possible areas of resonance and recognition with transgender or transmasculine experiences or the experiences of trans men. I argue that rumors of “border wars” have been exaggerated, as these territories are often overlapping. In addition, some individuals inhabit multiple sites of identity or shift between and across shared sites. Degrees of sex and gender dysphoria were not only reported by trans-identified individuals, and while not all such individuals adopted a trans identity, this was not necessarily because these border zone denizens felt a strong connection to femaleness or womanhood; often far from it. 相似文献
40.
R. Tonge Senior Lecturer P. C. Larsen M. Ito Investment Assistant 《Long Range Planning》1998,31(6):838-847
This article reports on a research project to identify the attributes of high and super growth medium-size companies, the strategies they employ to maintain growth and the critical success factors they consider vital to achieve rapid growth.
Pronounced differences were found in the preferences between both groups when ranking seven critical success factors: (1) Flexibility; (2) Product diversification; (3) Attracting and holding quality staff; (4) Niche marketing; (5) Early entry into growth markets; (6) Quality; (7) and Frequent innovation. There were also differences in their strategic objectives, as well as, in the ages of the growth companies. 相似文献