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Markus Neuhäuser 《Journal of applied statistics》2015,42(12):2769-2775
In the two-sample location-shift problem, Student's t test or Wilcoxon's rank-sum test are commonly applied. The latter test can be more powerful for non-normal data. Here, we propose to combine the two tests within a maximum test. We show that the constructed maximum test controls the type I error rate and has good power characteristics for a variety of distributions; its power is close to that of the more powerful of the two tests. Thus, irrespective of the distribution, the maximum test stabilizes the power. To carry out the maximum test is a more powerful strategy than selecting one of the single tests. The proposed test is applied to data of a clinical trial. 相似文献
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Research on stratification and mobility has consistently shown that in the UK there is a direct impact of social origin on occupational destination net of educational attainment even for degree‐holders. However, only a few studies applied a longitudinal and dynamic perspective on how intergenerational mobility shapes graduates’ working careers. Using multilevel growth curve modelling and data from the 1970 British cohort study (BCS70), we contribute to this research by looking at the emergence of social inequalities during the first ten years since labour market entry. We further distinguish between graduates of different fields of study as we expect social disparities to develop differently due to differences in initial occupational placement and upward mobility processes. We find that parental class does not affect occupational prestige over and above prior achievement. Separate analyses by the field of study show that initial differences in occupational prestige and career progression do not differ between graduates from different classes of origin in STEM fields, and arts and humanities. It is only in the social sciences that working‐class graduates start with lower occupational prestige but soon catch up with their peers from higher classes. Overall, our results indicate no direct effect of social origin on occupational attainment for degree‐holders once we broaden our focus to a dynamic life course perspective. 相似文献
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Markus Bell 《The Asia Pacific Journal of Anthropology》2019,20(1):22-41
This paper explores the changing relationship of diaspora to the homeland. In particular, this article focuses on the changing relationship of pro-North Korea, Zainichi Koreans (Koreans in Japan) towards North Korea. Many Koreans in Japan continue to identify with North Korea, but the nature of this relationship has changed, due to shifting generational attitudes towards both the host society and North Korea. A dance recital I witnessed in an ethnic Korean high school in Japan exemplifies these changes. I suggest that the symbols highlighted within the recital articulate a particular form of political-ethnic identity that is characterised by a long distance nationalism, but without the desire to return to the homeland. Based on a year of ethnographic fieldwork with members of the pro-North Korea organisation, Ch'ongry?n, this paper explores how diasporic groups construct, negotiate, and reproduce identity in relation to nation states and transnational processes. 相似文献
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Richard V. Burkhauser Markus H. Hahn Matthew Hall Nicole Watson 《Population research and policy review》2016,35(2):197-215
The factors leading individuals to immigrate to developed contexts are widely studied, but comparatively less is known about those who emigrate from them. In this paper, we use data from a nationally representative cohort of Australian adults to develop longitudinal measures of emigration and to assess how social ties and individual economic position predict emigration. Cox proportional hazards models indicate that the propensity to emigrate is particularly pronounced for those with relatively little social connectedness in Australia. Specifically, our results show that first-generation Australians, especially those with relatively short durations in the country, have substantially higher emigration rates than later-generation Australians. Similarly, having a partner with deeper generational roots in Australia strongly reduces the likelihood to emigrate. At the same time, our analysis also shows that economic position matters, with the not employed having higher risks of emigration. Perhaps most interestingly, estimates from our models reveal that those with university degrees are much more likely to emigrate than individuals with lower levels of education, a finding that is true for both first- and later-generation Australians. 相似文献
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Markus Hahn Sylvia Frühwirth-Schnatter Jörn Sass 《AStA Advances in Statistical Analysis》2009,93(4):403-425
We consider the problem of estimating the rate matrix governing a finite-state Markov jump process given a number of fragmented
time series. We propose to concatenate the observed series and to employ the emerging non-Markov process for estimation. We
describe the bias arising if standard methods for Markov processes are used for the concatenated process, and provide a post-processing
method to correct for this bias. This method applies to discrete-time Markov chains and to more general models based on Markov
jump processes where the underlying state process is not observed directly. This is demonstrated in detail for a Markov switching
model. We provide applications to simulated time series and to financial market data, where estimators resulting from maximum
likelihood methods and Markov chain Monte Carlo sampling are improved using the presented correction. 相似文献