Der Wert von Kindern für ihre Eltern

Demographic and micro-economic approaches have not sufficiently resolved the explanation of fertility behavior and intergenerational relationships. The “value-of-children-approach” promises a possibility to solve these problems especially with regard to cross-cultural differences. The approach is re-conceptualized in the framework of the theory of social production functions as a special theory of action. Children are seen as strategic intermediate goods to fulfil basic needs of their (potential) parents: Their (1) work and income utility and their (2) insurance utility increases physical well-being, their (3) status utility and their (4) emotional utility increases social recognition. The explanatory potential of this special theory of action is systematically unfolded for six essential dimensions of the action system of the family (size, durability, context opportunities and restrictions, resources, intergenerational relationships, and gender). Finally, the implications for the modernization and social change of intergenerational relationships in societies with different kinship systems are discussed.     

A simple method for estimating a regression model for κ between a pair of raters

Agreement studies commonly occur in medical research, for example, in the review of X-rays by radiologists, blood tests by a panel of pathologists and the evaluation of psychopathology by a panel of raters. In these studies, often two observers rate the same subject for some characteristic with a discrete number of levels. The κ-coefficient is a popular measure of agreement between the two raters. The κ-coefficient may depend on covariates, i.e. characteristics of the raters and/or the subjects being rated. Our research was motivated by two agreement problems. The first is a study of agreement between a pastor and a co-ordinator of Christian education on whether they feel that the congregation puts enough emphasis on encouraging members to work for social justice (yes versus no). We wish to model the κ-coefficient as a function of covariates such as political orientation (liberal versus conservative) of the pastor and co-ordinator. The second example is a spousal education study, in which we wish to model the κ-coefficient as a function of covariates such as the highest degree of the father of the wife and the father of the husband. We propose a simple method to estimate the regression model for the κ-coefficient, which consists of two logistic (or multinomial logistic) regressions and one linear regression for binary data. The estimates can be easily obtained in any generalized linear model software program.     

Information,reflection, and successful job search: A labor market policy experiment

Jobseekers, especially young people with little experience on the job market, face several challenges. They need to know which jobs are suited for them, where to find them, how to apply, and they need resilience in the face of repeated rejections. Previous research has shown that receiving information and reflecting on how to search for a job enhance self-efficacy and search motivation, thereby reducing the duration of unemployment spells. Following up on these results, we conducted an experiment in cooperation with the Austrian Ministry of Social Affairs which combines an “information nudge” in the form of a short video-clip with what we call “reflection nudge” in the form of an online survey. We find that a treatment combining reflection and information reduces job search duration of young unemployed people with a low level of formal education. Considering the low costs of the intervention, efficiency is very high.     

Relative squared error prediction in the generalized linear regression model

In linear regression models, predictors based on least squares or on generalized least squares estimators are usually applied which, however, fail in case of multicollinearity. As an alternative biased estimators like ridge estimators, Kuks-Olman estimators, Bayes or minimax estimators are sometimes suggested. In our analysis the relative instead of the generally used absolute squared error enters the objective function. An explicit minimax solution is derived which, in an important special case, can be viewed as a predictor based on a Kuks-Olman estimator.     

Die Gesellschaftliche Akzeptanz der Sozialhilfe

This article examines on which grounds the German population is willing to support a social policy program targeted towards minorities such as social assistance. Using our own survey data and applying linear regression analysis, we test several hypotheses concerning the influence of self-interest, justice- orientations, and victim-blaming attitudes towards welfare recipients on two indicators of support for social assistance. A central finding is that the effects can be interpreted in line with the concept of a “moral economy”, in that the justice orientations of the respondents as well as their attitudes towards welfare recipients correspond with the norms incorporated in the institutional architecture of social assistance.     

A comparative study of conflicts experienced between immigrant parents in Canada and in Israel,and professionals in educational institutions about appropriate responses to children's misbehavior

One of the barriers which immigrant parents may encounter in the process of acculturation into their new country is differing expectations about ways in which teachers and other professionals involved in the educational system should relate to their children's misbehavior. To examine the potential sources of conflicts relating to disciplinary measures, a comparative study utilizing a qualitative methodology was conducted with 65 immigrant parents from Latin America in Canada and with 103 immigrant parents from the Former Soviet Union in Israel. The findings indicate that, in the two samples, participants experienced differences between their expectations about the way in which teachers should handle student misbehavior and the actual behavior of the teachers. The differences which the immigrant parents indicated could be characterized primarily as culturally based disagreements about (a) the types of misbehaviors which justify intervention by teachers, (b) the kind of disciplinary measures which should be used, (c) the factors that should be considered when deciding about disciplinary actions, and (d) the lack of sensitivity to the impact of immigration related difficulties on the behavior of children. The immigrants' current expectations of teachers' behavior was based on their experiences in their country of origin, and these were often in contradiction with the common approach in Canada and Israel. Ways of developing reciprocal channels of communication between professionals in schools and kindergartens and immigrant parents are suggested in order to overcome barriers and bridge gaps in communication.     

Methods to test for equality of two normal distributions

Statistical tests for two independent samples under the assumption of normality are applied routinely by most practitioners of statistics. Likewise, presumably each introductory course in statistics treats some statistical procedures for two independent normal samples. Often, the classical two-sample model with equal variances is introduced, emphasizing that a test for equality of the expected values is a test for equality of both distributions as well, which is the actual goal. In a second step, usually the assumption of equal variances is discarded. The two-sample t test with Welch correction and the F test for equality of variances are introduced. The first test is solely treated as a test for the equality of central location, as well as the second as a test for the equality of scatter. Typically, there is no discussion if and to which extent testing for equality of the underlying normal distributions is possible, which is quite unsatisfactorily regarding the motivation and treatment of the situation with equal variances. It is the aim of this article to investigate the problem of testing for equality of two normal distributions, and to do so using knowledge and methods adequate to statistical practitioners as well as to students in an introductory statistics course. The power of the different tests discussed in the article is examined empirically. Finally, we apply the tests to several real data sets to illustrate their performance. In particular, we consider several data sets arising from intelligence tests since there is a large body of research supporting the existence of sex differences in mean scores or in variability in specific cognitive abilities.