False Belief and Emotion Understanding in Post-institutionalized Children

Deficits in social cognition may impair the ability to negotiate social transactions and relationships and contribute to socio emotional difficulties experienced by some post‐institutionalized children. We examined false belief and emotion understanding in 40 institutional care‐adopted children, 40 foster care‐adopted children and 40 birth children. Both groups of adopted children were adopted internationally. Controlling for verbal ability, post‐institutionalized children scored lower than birth children on a false belief task. Almost half of the post‐institutionalized children performed below chance levels. The foster care group did not differ from either group on false belief understanding. The groups did not differ on emotion understanding after controlling for verbal ability. The results suggest that some post‐institutionalized children are delayed in false belief understanding.     

On the wealth of nations: Bourdieuconomics and social capital

Theory and Society - Why are some countries richer than others? We suggest in the line of political economy theory that traditional production factors cannot explain the observed differences....     

Gendered Social Worlds in Preschool: Dominance, Peer Acceptance and Assertive Social Skills in Boys' and Girls' Peer Groups

How dominance in the competitive MovieViewer (MV) task relates to peer preference and assertive behavior, and whether these relations differ for boys and girls were explored. Ninety‐one preschool children in same‐sex quartets were videotaped interacting in the MV task and dominance ranks were assigned according to viewing time. Peer preference was explored by looking separately at the number of likes and dislikes a child received in sociometric interviews. Multivariate analyses revealed that sex interacted with rank to explain peer acceptance but not peer rejection. High ranked boys were accepted more by peers than low ranked boys, while low ranked girls were accepted more than high ranked girls. Further analyses revealed that girls, but not boys, accepted the low ranked girls. The difference in girls’ and boys’ acceptance of same‐sex peers who act assertively in the MV task is consistent with the notion that gendered cultures develop in the preschool years.     

The Impact of Children on Divorce Risks of Swedish Women

The purpose of this paper is to study the impact of children on divorce risks in 1971–1994 for first-married Swedish women. This impact is examined using two measures of family composition, namely the number of children and the age of the youngest child, and we find an independent effect from each of these factors on the propensity to divorce. There is an additional impact of births prior to marriage on the subsequent divorce risk. We present time series of divorce risks for women with different types of children, showing trends for both the factors of parity and age of youngest child. The general picture of Swedish divorce-risk trends shows a strong increase in 1974, mostly among childless women, in response to a reform of the divorce legislation. Since the beginning of the 1980s, the risks have increased steadily, mostly among mothers. Our study is performed by indirect standardization of register data and we also control for the effects of age at and duration of marriage.     

Analysis of rounded exponential data

The problem of inference based on a rounded random sample from the exponential distribution is treated. The main results are given by an explicit expression for the maximum-likelihood estimator, a confidence interval with a guaranteed level of confidence, and a conjugate class of distributions for Bayesian analysis. These results are exemplified on two concrete examples. The large and increasing body of results on the topic of grouped data has been mostly focused on the effect on the estimators. The methods and results for the derivation of confidence intervals here are hence of some general theoretical value as a model approach for other parametric models. The Bayesian credibility interval recommended in cases with a lack of other prior information follows by letting the prior equal the inverted exponential with a scale equal to one divided by the resolution. It is shown that this corresponds to the standard non-informative prior for the scale in the case of non-rounded data. For cases with the absence of explicit prior information it is argued that the inverted exponential prior with a scale given by the resolution is a reasonable choice for more general digitized scale families also.     

A maximum-likelihood estimator with infinite error

The standard error of the maximum-likelihood estimator for 1/μ based on a random sample of size N from the normal distribution N(μ,σ²) is infinite. This could be considered to be a disadvantage.Another disadvantage is that the bias of the estimator is undefined if the integral is interpreted in the usual sense as a Lebesgue integral. It is shown here that the integral expression for the bias can be interpreted in the sense given by the Schwartz theory of generalized functions. Furthermore, an explicit closed form expression in terms of the complex error function is derived. It is also proven that unbiased estimation of 1/μ is impossible.Further results on the maximum-likelihood estimator are investigated, including closed form expressions for the generalized moments and corresponding complete asymptotic expansions. It is observed that the problem can be reduced to a one-parameter problem depending only on , and this holds also for more general location-scale problems. The parameter can be interpreted as a shape parameter for the distribution of the maximum-likelihood estimator.An alternative estimator is suggested motivated by the asymptotic expansion for the bias, and it is argued that the suggested estimator is an improvement. The method used for the construction of the estimator is simple and generalizes to other parametric families.The problem leads to a rediscovery of a generalized mathematical expectation introduced originally by Kolmogorov [1933. Foundations of the Theory of Probability, second ed. Chelsea Publishing Company (1956)]. A brief discussion of this, and some related integrals, is provided. It is in particular argued that the principal value expectation provides a reasonable location parameter in cases where it exists. This does not hold generally for expectations interpreted in the sense given by the Schwartz theory of generalized functions.     

Childbearing after Migration: Fertility Patterns of Foreign‐born Women in Sweden1

The present study provides an investigation of patterns in childbearing among foreign‐born women in Sweden from the 1960s to the 1990s. Event‐history techniques are applied to longitudinal population register data on childbearing and migration of 446,000 foreign‐born women who had ever lived in Sweden before the end of 1999. Period trends in parity‐specific fertility appear to be quite similar for Swedish‐ and foreignborn women, but important differences exist in levels of childbearing propensities between women from different countries of origin. Most immigrant groups tend to display higher levels of childbearing shortly after immigration. We conclude that migration and family building in many cases are interrelated processes and that it is always important to account for time since migration when fertility of immigrants is studied.     

The Impact of Labour-Force Participation on Childbearing Behaviour: Pro-Cyclical Fertility in Sweden during the 1980s and the 1990s

During the last two decades, Sweden has experienced strong fluctuations both in its economy and in its level of childbearing. A period of high employment and increasing fertility has been followed by a period of lower employment and decreasing fertility since the beginning of the 1990s. In this paper, we use register data for Swedish women in order to examine how various types of attachment to the labour market affect women's propensity to give birth at different parities. Specifically, we show what impact changes in women's employment status have had on recorded fertility trends in Sweden. We find that women who have relatively low levels of income and women who are enrolled as students generally have lower fertility than other women. We also find that a rise in the number of women with such characteristics can explain part of the decrease in fertility during the 1990s. It is evident, however, that other factors, working at the macro level, also have to be considered when one wants to explain the fluctuating fertility of Sweden. Social policy is one such factor. In sum, we find a pattern of pro-cyclical fertility, where levels of female earnings are positively related to levels of childbearing.