Effects of Class Positions of Parents on Educational Attainment of Daughters and Sons*

Cet article évalue les effets de l'appartenance de la mère et du père à une classe - déterminée selon la théorie marxiste des classes -sur le niveau d'instruction de leurs enfants, garçons et filles, au Canada. Les données sont tirées d'un échantillon représentatif de Canadiens et de Canadiennes. Les analyses multivariables mon-trent que l'appartenance du père et de la mère à une classe influe sur le niveau d'instruction des enfants des deux sexes. Que le père ou la mère soit issu de la bourgeoisie, de la classe des dirigeants ou de la classe des spécialistes, l'enfant aura un niveau d'instruction plus élevé que celui dont les parents appartiennent à une autre classe. On a toutefois observé que seuls certains effets de l'appartenance à une classe étaient directs; les effets liés à l'appartenance à une classe semblent ne se manifester que partiellement dans les differences de niveau d'instruction des parents, qui sont liées à la classe à laquelle ils appartiennent. Les niveaux d'instruction de la mere et du père influent directement sur le niveau d'instruction des enfants des deux sexes, une fois neutralisés les effets de l'appartenance sociale des parents. De plus, les effets du niveau d'instruction du père et de la mère ont tendance à différer selon le sexe de l'enfant (le niveau d'études de la mère influe davantage sur celui de la fille et à l'inverse celui du père influe davantage sur celui du fils). Toutefois, cette tendance ne se vérifie pas en ce qui concerne les effets de l'appartenance des parents à une classe. Les analyses qui comparent les sous-échantillons d'âges indiquent que la double influence de l'appartenance des parents à une classe et de leur niveau d'instruction a diminué après les années soixante compara-tivement aux années précédentes. Les résultats sont interprétés à la lumière de la théorie du capital culturel. This paper assesses the effects of mothers' and fathers' class positions—measured in terms of Marxist class categories—on the educational attainment of male and female offspring in Canada. Our data are from a national representative sample of Canadians. Multivariate analyses show that, for offspring of both genders, the class positions of fathers and mothers influence educational attainment. Where either parent was a member of the bourgeois, managerial or expert class categories, this meant more education for the offspring than other class backgrounds. Only some proportions of the class effects were direct; the effects of class background appear to partially operate through differences in educational attainment of parents that are associated with parents' class positions. Mothers' and fathers' education levels continue to have comparatively strong positive relationships with educational attainment for offspring of both genders after controls for class categories of parents. Further, the effects of paternal and maternal education tend to be “same-sex directed” (mothers' education levels have stronger effects for daughters than for sons and vice versa for fathers' education). However, a similar pattern does not hold for the effects of parental class positions. Analyses comparing age sub-samples indicate that the influences of both parental class positions and parental education levels upon educational attainment of offspring have decreased in the post-1960 period compared with earlier years. The results are interpreted in terms of the theory of cultural capital.     

Order statistics and their concomitants from multivariate normal mean–variance mixture distributions with application to Swiss Markets Data

In this article, by considering a multivariate normal mean–variance mixture distribution, we derive the exact joint distribution of linear combinations of order statistics and their concomitants. From this general result, we then deduce the exact marginal and conditional distributions of order statistics and their concomitants arising from this distribution. We finally illustrate the usefulness of these results by using a Swiss markets dataset.     

Long-term effects of back extensor strengthening exercises on quality of life in women with osteoporosis

The aim of the present study was to evaluate the long-term effect of back extensor strengthening exercises on health-related quality of life (QOL) in women with osteoporosis. In this randomized clinical trial, 183 women with osteoporosis were treated with pharmacotherapy and weight-bearing and balance-training exercises. The case group additionally performed back extensor exercises at home. Patients filled out the Persian version of the Short Form (SF-36) QOL questionnaire at baseline and 6 months post treatment. At the end, all physical and mental parameters of the SF-36 questionnaire improved significantly in the case group, except for one subscale of mental health, compared to the control group. In the control group, only some physical health dimensions (bodily pain, role limitation, physical function, vitality), and mental health status as a mental health subscale improved. In conclusion, considering a major impact of back extensor exercises on improving QOL in women with osteoporosis over the long term, these exercises should be prescribed in routine management of these patients.     

Change Point Estimation of Multivariate Linear Profiles Under Linear Drift

In this paper, maximum likelihood estimators (MLE) for both step and linear drift changes in the regression parameters of multivariate linear profiles are developed. Performance of the proposed estimators is compared under linear drift changes in the regression parameters when a combined MEWMA and Chi-square control charts method signals an out-of-control condition. The effect of smoothing parameter of MEWMA control charts, missing data, and multiple drift changes on the performance of the both estimators is also evaluated. The application of the proposed estimators is also investigated thorough a numerical example resulted from a real case.     

Procrustes shape analysis of triangulations of a two coloured point pattern

Consider a set of points in the plane with Gaussian perturbations about a regular mean configuration in which a Delaunay triangulation of the mean of the process is comprised of equilateral triangles of the same size. The points are labelled at random as black or white with variances of the perturbations possibly dependent on the colour. By investigating triangle subsets (with four sets of possible colour labels for the vertices) in detail we propose various test statistics based on a Procrustes shape analysis. A simulation study is carried out to investigate the relative merits and the adequacy of the approximations used in the distributional results, as well as a comparison with simulation methods based on nearest-neighbour distances. The methodology is applied to an investigation of regularity in human muscle fibre cross-sections.     

A simulation comparison on spatial Poisson mixed models

The statistical methods for analyzing spatial count data have often been based on random fields so that a latent variable can be used to specify the spatial dependence. In this article, we introduce two frequentist approaches for estimating the parameters of model-based spatial count variables. The comparison has been carried out by a simulation study. The performance is also evaluated using a real dataset and also by the simulation study. The simulation results show that the maximum likelihood estimator appears to be with the better sampling properties.     

Social Participation, Sense of Community and Social Well Being: A Study on American, Italian and Iranian University Students

Aim of the study was to assess the relationship between social participation and Sense of Community in a sample of University students and the impact of such variables on Social well being. A further aim was to assess the generality of the relationships between these constructs across different countries, and specifically, the USA, Italy and Iran. The sample includes 200 Italian, 125 American and 214 Iranian University students, male and female. Results show higher levels of social participation, Sense of Community and Social well being among American students. Sense of Community is positively correlated with social participation in all three samples; however, only among Italian students social participation positively predicts Social well being. Implications of results will be discussed.