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排序方式: 共有114条查询结果,搜索用时 15 毫秒
41.
Social Indicators Research - 相似文献
42.
This paper presents a set of REDUCE procedures that make a number of existing higher-order asymptotic results available for both theoretical and practical research. Attention has been restricted to the context of exact and approximate inference for a parameter of interest conditionally either on an ancillary statistic or on a statistic partially sufficient for the nuisance parameter. In particular, the procedures apply to regression-scale models and multiparameter exponential families. Most of them support algebraic computation as well as numerical calculation for a given data set. Examples illustrate the code. 相似文献
43.
We aim to promote the use of the modified profile likelihood function for estimating the variance parameters of a GLMM in
analogy to the REML criterion for linear mixed models. Our approach is based on both quasi-Monte Carlo integration and numerical
quadrature, obtaining in either case simulation-free inferential results. We will illustrate our idea by applying it to regression
models with binary responses or count data and independent clusters, covering also the case of two-part models. Two real data
examples and three simulation studies support the use of the proposed solution as a natural extension of REML for GLMMs. An R package
implementing the methodology is available online. 相似文献
44.
45.
The main purpose of this study is to analyze the global and local statistical properties of nonparametric smoothers subject
to a priori fixed length restriction. In order to do so, we introduce a set of local statistical measures based on their weighting
system shapes and weight values. In this way, the local statistical measures of bias, variance and mean square error are intrinsic
to the smoothers and independent of the data to which they will be applied on. One major advantage of the statistical measures
relative to the classical spectral ones is their easiness of calculation. However, in this paper we use both in a complementary
manner. The smoothers studied are based on two broad classes of weighting generating functions, local polynomials and probability
distributions. We consider within the first class, the locally weighted regression smoother (loess) of degree 1 and 2 (L1
and L2), the cubic smoothing spline (CSS), and the Henderson smoothing linear filter (H); and in the second class, the Gaussian
kernel (GK). The weighting systems of these estimators depend on a smoothing parameter that traditionally, is estimated by
means of data dependent optimization criteria. However, by imposing to all of them the condition of an equal number of weights,
it will be shown that some of their optimal statistical properties are no longer valid. Without any loss of generality, the
analysis is carried out for 13- and 9-term lengths because these are the most often selected for the Henderson filters in
the context of monthly time series decomposition.
We would like to thank an Associate Editor and an anonymous referee for their valuable comments on an earlier version of this
paper. Financing from MURST is also gratefully acknowledged. 相似文献
46.
In this paper we analyse the performances of a novel approach to modelling non-linear conditionally heteroscedastic time series
characterised by asymmetries in both the conditional mean and variance. This is based on the combination of a TAR model for
the conditional mean with a Constrained Changing Parameters Volatility (CPV-C) model for the conditional variance. Empirical
results are given for the daily returns of the S&P 500, NASDAQ composite and FTSE 100 stock market indexes. 相似文献
47.
Alessandra H. Rellini Anka A. Vujanovic Myani Gilbert Michael J. Zvolensky 《Journal of sex research》2013,50(5):434-442
This study examined relations among childhood maltreatment, difficulties in emotion regulation, and sexual and relationship satisfaction among young adult women reporting current involvement in committed, romantic relationships. A sample of 192 women (ages 18–25) completed self-report questionnaires as part of an Internet-based survey. It was hypothesized that severity of childhood maltreatment and difficulties in emotion regulation would each independently and negatively predict (a) sexual satisfaction, (b) relationship intimacy, and (c) expression of affection within the context of the relationship. Furthermore, it was hypothesized that greater emotion regulation difficulties would moderate the effects of childhood maltreatment on these sexual and relationship variables (i.e., sexual satisfaction, relationship intimacy, and expression of affection). Findings suggest that difficulties in emotion regulation demonstrated an incremental effect with regard to sexual satisfaction, but not with intimacy and affection expression. In contrast to predictions, no significant interactive effects were documented. Clinical implications and future directions related to this line of inquiry are discussed. 相似文献
48.
Rendall M Aracil E Bagavos C Couet C Derose A Digiulio P Lappegard T Robert-Bobée I Rønsen M Smallwood S Verropoulou G 《Population studies》2010,64(3):209-227
According to the 'reproductive polarization' hypothesis, family-policy regimes unfavourable to the combination of employment with motherhood generate greater socio-economic differentials in fertility than other regimes. This hypothesis has been tested mainly for 'liberal' Anglo-American regimes. To investigate the effects elsewhere, we compared education differentials in age at first birth among native-born women of 1950s and 1960s birth cohorts in seven countries representing three regime types. Women with low educational attainment have continued to have first births early, not only in Britain and the USA but also in Greece, Italy, and Spain. Women at all other levels of education have experienced a shift towards later first births, a shift that has been largest in Southern Europe. Unlike the educationally heterogeneous changes in age pattern at first birth seen under the Southern European and Anglo-American family-policy regimes, the changes across birth cohorts in the study's two 'universalistic' countries, Norway and France, have been educationally homogeneous. 相似文献
49.
As the world population is ageing, studies on the socio-economic and health consequences are proliferating. Little has been done on the effectiveness and impact elderly may benefit from the use of technology in their everyday life. The pilot study, implemented within a funded project aimed at identifying sustainable actions to promote Seniors' quality of life, intended to investigate this kind of interaction in terms of accessibility and acceptability that senior citizen experience with technological devices promoting motor and cognitive training. In the hypothesis, interfaces and technological artifacts, that still take in little account the seniors' physical characteristics (e.g. physiological limitations in sight, hearing, movement) and cognitive processes (selective memory often driven by practical needs), can cause elderly to mistrust technology. Study participants were twenty over seventy-year-old people, who were observed and interviewed in context in a two-hour training session regarding the technological devices user experience. The results are presented with scenario-based techniques that help represent typologies of users in different use situations. Findings confirm the hypothesis, highlighting that elderly may accept technological artifacts when they perceive them as bringing benefits in terms of well-being and health. 相似文献
50.
Gender statistics play a crucial role in social research and in the creation of gender sensitive policies. Gender statistics document the situation of women and men around the world, making it easier to raise awareness about inequalities between them, to monitor gender equality and promote actionable change. There is thus a need to encourage awareness about gender statistics and their usefulness in gender mainstreaming. The paper has different aims: (1) to discuss the role of gender statistics and gender sensitive indicators; (2) to give an overview of the main gender sensitive European databases; (3) to present the European Commission Strategy on Gender Equality; (4) to display information collected by the European Institute for Gender Equality (Eige) database; (5) to promote proposal for increasing the gender sensitivity of social indicators. 相似文献