A Population Approach to Analysis of Variance Models

Several authors have contributed to what can now be considered a rather complete theory for analysis of variance in cases with orthogonal factors. By using this theory on an assumed basic reference population, the orthogonality concept gives a natural definition of independence between factors in the population. By looking upon the treated units in designed experiments as a formal sample from a future population about which we want to make inference, a natural parametrization of expectations and variances connected to such experiments arises. This approach seems to throw light upon several controversial questions in the theory of mixed models. Also, it gives a framework for discussing the choice of conditioning in models     

Simple Counterexamples against the Conditionality Principle

The famous theorem of Birnbaum, stating that the likelihood principle follows from the conditionality principle together with the sufficiency principle, has caused much discussion among statisticians. Briefly, many writers dislike the consequences of the likelihood principle (among other things, confidence coefficients and levels of tests are dismissed as meaningless), but at the same time they feel that both the conditionality principle and the sufficiency principle are intuitively obvious. In the present article we give examples to show that the conditionality principle should not be taken to be of universal validity, and we discuss some consequences of these examples.     

How do parents’ educational fields affect the choice of educational field?

This study examines the links between parental education and students’ choice of field of study in Norwegian higher education. In our interpretation of the results, we suggest a status group perspective that integrates risk aversion models, micro‐class theory, and cultural reproduction schemes. Complete Norwegian register data for all individuals born from 1955 to 1980 allow for a fine‐grained examination of diverse fields of study not attempted in earlier studies. The findings reveal that intergenerational reproduction of educational fields is widespread, but its extent varies across fields of study. The tendency is most pronounced among children of professional, educated parents with masters and higher‐level degrees. Moreover, the analysis shows that students who do not choose the same field as their parents nonetheless tend to choose educational fields close to those of their parents.     

Are nurses more altruistic than real estate brokers?

We report results from a dictator game experiment with nurse students and real estate broker students as dictators, and Amnesty International as the recipient. Although brokers contributed substantial amounts, nurses contributed significantly more, on average 76% of their endowment. In a second part, subjects chose between a certain repetition of the experiment and a 50-50 chance of costly exit. About one third of the brokers and half of the nurses chose the exit option. While generosity was indeed higher among nurses, even when taking exits into account, the difference cannot readily be attributed to different degrees of altruism.     

Effectiveness of the International Child Development Programme: Results from a randomized controlled trial

This study aimed to evaluate the effectiveness of the International Child Development Programme (ICDP), a group-based parenting programme used internationally and implemented nationally in Norway. We used a cluster randomized controlled trial in which 81 groups were randomly assigned to either the intervention or waitlist control condition after the baseline data collection. A total of 590 parents completed at least one of three questionnaires (administrated before and after ICDP and 4 months after completing the intervention). Primary outcomes included parental self-efficacy, parental emotion sensitivity and positive involvement with their child. Secondary outcomes included parents' perceptions of their relationship with the child, child-rearing conflicts and the child's psychosocial health. We found significant effects favouring the intervention arm following the intervention and at follow-up on two primary outcomes (parental self-efficacy and emotion sensitivity). For the secondary outcomes, we found a significant reduction in child-rearing conflict at the 4-month follow-up, increased closeness to the child, reduced child internalizing difficulties and increased prosocial behaviour immediately following the intervention. However, ICDP seems to have limited effects on parent-reported changes in children. We conclude that ICDP as a universal preventive programme offered to parents in groups can be effective in strengthening parental self-efficacy and improving parental emotion sensitivity.     

THE DEVELOPMENTAL EFFECT OF STATE ALCOHOL PROHIBITIONS AT THE TURN OF THE TWENTIETH CENTURY

We examine the quasi‐randomization of alcohol consumption created by state‐level alcohol prohibition laws passed in the United States in the early part of the twentieth century. Using a large dataset of World War II enlistees, we exploit the differential timing of these laws to examine their effects on adult educational attainment, obesity, and height. We find statistically significant effects for education and obesity that do not appear to be the result of pre‐existing trends. Our findings add to the growing body of economic studies that examine the long‐run impacts of in utero and childhood environmental conditions. (JEL I18, D10, N41, N42)     

The impact of unions on job satisfaction,organizational commitment,and turnover

Conclusion The research on the exit-voice hypothesis, both in the United States and abroad, shows convincingly that most of the variance in the negative union effect on job satisfaction can be accounted for by job quality, industrial relation climate, and wages. Union members see their jobs as less attractive than do nonunion workers in terms of skill requirements, task complexity, the amount of autonomy or discretion available, and opportunities for promotion. Union members also perceive the supervision they receive and the labor-management relations they experience as less satisfactory. They are, however, clearly better off with respect to wages, benefits, and pensions. But when it comes to job satisfaction, the economic advantages of union jobs are not sufficient to compensate for job content and work environment factors. It comes as no surprise to the job satisfaction researcher that job content — the nature of the tasks people are given to do — weighs heavily in overall job satisfaction scores. While there are individual differences in the degree to which people prefer intrinsically interesting jobs, there is ample empirical evidence showing that autonomy, skill variety, complexity, challenge, and advancement are important determinants of people's affective reactions to their jobs (Deci, 1975; Hackman and Oldham, 1980; Kanfer, 1990). The relative importance of job content factors to overall job satisfaction is also mirrored in the most commonly used measures of job satisfaction (Weiss et al., 1967).     

Parental Child‐Rearing Conflicts Through Adolescence: Trajectories and Associations With Child Characteristics and Externalizing Patterns

Research on longitudinal interparental conflict patterns and offspring development is scarce. The population‐based TOPP study (N = 459) was used to investigate (1) child‐rearing conflict trajectories through four time points during childhood and adolescence (ages 8–16), and (2) associations between conflict trajectories and child characteristics (i.e., birth order, gender, externalizing patterns from early childhood). Latent profile analysis identified six distinct trajectories. Conflict levels decreased for most respondents over the adolescent offspring period, but offspring's birth order and externalizing problems were related to less typical trajectories and higher levels of conflict. Onset of externalizing problems was of additional importance for the course of parental child‐rearing conflicts. The results highlight the perception of the whole family as an interwoven system.