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排序方式: 共有188条查询结果,搜索用时 46 毫秒
81.
This article considers an approach to estimating and testing a new Kronecker product covariance structure for three-level (multiple time points (p), multiple sites (u), and multiple response variables (q)) multivariate data. Testing of such covariance structure is potentially important for high dimensional multi-level multivariate data. The hypothesis testing procedure developed in this article can not only test the hypothesis for three-level multivariate data, but also can test many different hypotheses, such as blocked compound symmetry, for two-level multivariate data as special cases. The tests are implemented with two real data sets. 相似文献
82.
Do Mediterraneans really do it better? Explaining the lower gender wage gap in southern European countries
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Ricardo Alaez‐Aller Juan Carlos Longas‐Garcia Miren Ullibarri‐Arce 《International Journal of Social Welfare》2015,24(2):120-132
This article sets out to help provide a more detailed explanation for the narrower gender wage gap in Mediterranean countries. Two explanatory hypotheses are put forward and compared empirically using the European Union Statistics on Income and Living Conditions (EU‐SILC). The most widely accepted hypothesis is that gender wage gaps across countries are negatively correlated with gender employment gaps. The second hypothesis, however, is supported by evidence that the narrower wage gap in Mediterranean countries could be due to the differences in demand for labour in EU countries as a result ultimately of decisions by major corporations concerning the location of the activities in their value chain. 相似文献
83.
Ignacio López-de-Ullibarri Paul Janssen Ricardo Cao 《Journal of statistical planning and inference》2012
Using some logarithmic and integral transformation we transform a continuous covariate frailty model into a polynomial regression model with a random effect. The responses of this mixed model can be ‘estimated’ via conditional hazard function estimation. The random error in this model does not have zero mean and its variance is not constant along the covariate and, consequently, these two quantities have to be estimated. Since the asymptotic expression for the bias is complicated, the two-large-bandwidth trick is proposed to estimate the bias. The proposed transformation is very useful for clustered incomplete data subject to left truncation and right censoring (and for complex clustered data in general). Indeed, in this case no standard software is available to fit the frailty model, whereas for the transformed model standard software for mixed models can be used for estimating the unknown parameters in the original frailty model. A small simulation study illustrates the good behavior of the proposed method. This method is applied to a bladder cancer data set. 相似文献
84.
Ricardo Pagán-Rodríguez 《Social indicators research》2012,108(3):365-385
The aim of this paper is to analyse the effect of the onset of disability on life satisfaction and five different domains of satisfaction (health, household income, housing, job, leisure) for German individuals. Particular attention is paid to examining whether individuals can adapt to disability over time before and after its onset in terms of satisfaction. Using longitudinal data from the German Socio-Economic Panel (GSOEP) for the period 1984?C2008, we estimate an innovative fixed-effects model on life satisfaction and each domain of satisfaction for working-age males (aged 21?C58), which allows us to estimate lag and lead effects and thus to test the anticipation and adaptation hypotheses. Although individual obtain complete adaptation to disability in terms of global life satisfaction (5?years after the onset), this adaptation is not complete in all domains of satisfaction. For example, despite the fact that the levels of health satisfaction drop as the individual becomes disabled, after the onset it increases but the levels are lower than those reached before the onset. In contrast, the adaptation is especially faster in the terms of leisure satisfaction (3?years after the onset), household income and housing satisfaction (5?years after the onset in both cases). Our results support the findings obtained in other psychological studies that conclude that the domain of disability extends far beyond health related concerns to encompass the person??s well-being definition of self and social position. Finally, these findings may help policy makers and government to promote social and economic measures and actions lead to increase the scores of global well-being and specific domains of satisfaction of this collective. 相似文献
85.
Deprivation index for small areas in Spain 总被引:1,自引:0,他引:1
Carmen?Sánchez-CantalejoEmail author Ricardo?Ocana-Riola Alberto?Fernández-Ajuria 《Social indicators research》2008,89(2):259-273
The term deprivation is often used to refer to economic or social shortages in a given geographical area. This concept of
deprivation has been identified for years using simple indicators such as income level, education and social class. One of
the advantages of using simple indicators is the availability of data, since they come directly from sources of information
like censuses and population registers. However, the main disadvantage of these indicators is their limited usefulness when
measuring a concept as complex as deprivation with a single variable. One possible solution to this problem is using compound
indices, made up of a combination of simple indicators. For years, the concept of material deprivation in Spain has been measured
using indices or indicators imported from other countries. However, there are no studies that investigate if all of these
variables are really related to material deprivation in Spain. In this context, the objective of this study is to create a
synthetic index for material deprivation for the municipalities in Spain, bearing in mind the variables available from the
Population and Housing Census. The index was built on a principal components factor analysis. The analysis showed two factors.
The first factor showed a high positive correlation to the variables relating to illiteracy rate, unemployment rate and percentage
of manual labourers, while the second factor was seen as highly positively correlated to the variables relating to the percentage
of homes without access to a vehicle and the dependency index and also correlated, though negatively, to the percentage of
foreigners between 16 and 49 who lived abroad in 1991. The variables that make up the first factor can be considered to be
an approximation of the concept of deprivation in Spain. This study proposes a deprivation index made up of three simple indicators
available from national information sources: percentage of illiteracy, percentage of unemployment and percentage of manual
labourers. With this index, the criteria for measuring deprivation in Spanish municipalities can be unified and a comparison
of the results of the different studies in our context facilitated. 相似文献
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Ricardo Rocha Saralees Nadarajah Vera Tomazella Francisco Louzada 《Lifetime data analysis》2016,22(2):216-240
The presence of immune elements (generating a fraction of cure) in survival data is common. These cases are usually modeled by the standard mixture model. Here, we use an alternative approach based on defective distributions. Defective distributions are characterized by having density functions that integrate to values less than \(1\), when the domain of their parameters is different from the usual one. We use the Marshall–Olkin class of distributions to generalize two existing defective distributions, therefore generating two new defective distributions. We illustrate the distributions using three real data sets. 相似文献
90.