Estimating the reliability of repeatedly measured endpoints based on linear mixed‐effects models. A tutorial

There are various settings in which researchers are interested in the assessment of the correlation between repeated measurements that are taken within the same subject (i.e., reliability). For example, the same rating scale may be used to assess the symptom severity of the same patients by multiple physicians, or the same outcome may be measured repeatedly over time in the same patients. Reliability can be estimated in various ways, for example, using the classical Pearson correlation or the intra‐class correlation in clustered data. However, contemporary data often have a complex structure that goes well beyond the restrictive assumptions that are needed with the more conventional methods to estimate reliability. In the current paper, we propose a general and flexible modeling approach that allows for the derivation of reliability estimates, standard errors, and confidence intervals – appropriately taking hierarchies and covariates in the data into account. Our methodology is developed for continuous outcomes together with covariates of an arbitrary type. The methodology is illustrated in a case study, and a Web Appendix is provided which details the computations using the R package CorrMixed and the SAS software. Copyright © 2016 John Wiley & Sons, Ltd.     

Market transition or path dependency?: Changing effects of income determinants in the Czech Republic,Hungary, Poland,Russia, and Slovakia, 1991–2002

A major issue in the market transition debate on transitional societies is the extent to which changing economic institutions are responsible for the changing stratification order in post-Communist societies, as assumed by the Market Transition Theory (MTT). Advocates of path dependent transformation processes assume varying transformation processes across post-Communist societies. They have criticized the MTT of being insensitive to the different paths of transformation post-Communist societies go through and the way this will influence changes in the effects of income determinants. This study will test the extent to which trends in the effects of income determinants converge across post-Communist societies. A cross-national and across time comparative research design will be employed, analyzing 61 cross-sectional, standardized surveys for five Central and Eastern countries covering the period 1991–2002. Results from modified weighted least squares regression analyses show an increasing trend in the effect of years of education on standardized personal income for all five countries as predicted by the MTT. Income effects of years of experience, private sector employment and gender do not show increasing trends for all countries, contradicting the MTT. The empirical trends in effects of income determinants are to a great extent consistent with Stark's typology of privatization strategies, giving some support to the theoretical notion of path dependent transformation processes.     

The Imaginary Audience and Personal Fable: Factor Analyses and Concurrent Validity of the “New Look” Measures

This study examined key components of the “New Look” at the imaginary audience and personal fable constructs. Toward this end, data from four samples of Belgian high school students (N= 1,458) were analyzed. Confirmatory and exploratory factor analyses failed to confirm that the measures associated with the New Look theory, the New Imaginary Audience Scale, and the New Personal Fable Scale (NPFS), tapped a common underlying construct. Only the invulnerability and omnipotence subscales of the NPFS proved to be highly related. In line with the New Look theory, boys were found to believe more strongly in their own uniqueness, invulnerability, and omnipotence than were girls. Higher scores on the invulnerability and omnipotence subscales were associated with lower levels of depression and loneliness. Finally, each aspect of the personal fable seemed to have its own specific role in the process of separation – individuation. Implications of these findings for the New Look theory of the imaginary audience and the personal fable are discussed. Suggestions for future research are put forth, with particular emphasis on the role of the invulnerability/omnipotence complex in adolescent development and behavior and on the family resemblances among the various aspects of the personal fable.     

Social work and parent support in reaction to children's antisocial behaviour: constructions and effects

This article focuses on STOP4-7, an ecological early intervention programme for children with serious behavioural problems in Belgium, which includes social skills training for children, management training for parents and classroom management training for teachers. We argue how this type of social work benefits from empirical research on its effects on children and parents. Yet social work research that addresses these questions needs to extend its focus to overt and covert inclusion and exclusion mechanisms that operate through social work. Finally, we argue that, in the case of STOP4-7, social work is embedded in the process of social and political framing of the problems it is supposed to solve. By extending the focus of social work research to the very construction of social problems, we show how social workers may perform their agency as reflective practitioners, rather than being objects of interventions.     

Solidarity towards immigrants in European welfare states

The concern that immigration could threaten the sustainability of the European Social Model is a reason to have a closer look at popular images of immigrants in the context of European welfare states. The focus is on Europeans' informal solidarity towards immigrants relative to other vulnerable groups in society. Using data from the European Values Survey 1999/2000 we find that in all European countries the public is least solidaristic towards migrants, in comparison with elderly people, sick and disabled people and unemployed people. Contrary to expectation, there is little relation between welfare state characteristics and people's solidarity, while the relative solidarity towards immigrants is higher in culturally more diverse countries. As expected, the relative solidarity towards immigrants is lower in countries with a more negative opinion climate towards immigrants and in poorer countries of Europe.     

South African quotas on textile imports from China: A policy error?

In August 2006 the South African government announced quotas on the imports of clothing and textile products from China. Three questions arise. What are these expected benefits? What will be the most likely impact of the import quotas on the South African economy? And what are the policy implications? In this paper we answer these questions by using a computable general equilibrium (CGE) model. We find that, contrary to the motivations apparently underlying the quota implementation, the macro-economic, sector and household effects are negative and result in greater inequality between poorer and richer households. We refer to modeling results elsewhere in the literature which report results consistent to ours. The policy implications are that the imposition of these quotas could come to be seen as a policy mistake, and that South Africa may benefit more from considering a free trade agreement with China.     

Contents of Volume 61

Volume Contents

Contents of Volume 61