Will they stay or will they go? How network properties of WebICs predict dropout rates of valuable Wikipedians

This paper contributes to our understanding of an increasingly prevalent work system, web-based internet communities (WebICs). We are particularly interested in how WebICs are governed given the fact how different they are compared to more classical forms of organization. We study the governance of a WebIC by studying the structure and dynamics of their edit network. Given the fact that the edit network is a relational structure, social network analysis is key to understanding these work systems. We demonstrate that characteristics of the edit network contribute to predicting the dropout hazard of valuable WebIC members. Since WebICs exist only thanks to the activity of their contributors, predicting drop-outs becomes crucial. The results show that reputation and controversy have different effects for different types of Wikipedians; i.e., an actor’s reputation decreases the dropout hazard of active Wikipedians, while participation on controversial pages decreases the dropout hazard of highly active Wikipedians.     

What is healthy work for women and men? - A case-control study of gender- and sector-specific effects of psycho-social working conditions on long-term sickness absence

The aim of the study was to investigate the relevance of the demand-control model and social support in predicting long-term sickness absence (LTSA). Identifying gender- and sector- (private vs. public) specific patterns was in focus. The study uses a cross-sectional design with a case and a control group. The cases are a sample of 2 327 long-term sick listed (>60 days) and the controls are a Swedish population-based sample of 2 063. Data on sickness absence were retrieved from the Swedish national social insurance registers. Data on health, working and living conditions were gathered through a self-administered questionnaire. The results show that employed women have a notably higher risk for LTSA than employed men. High-strain jobs increase the odds for LTSA among both women and men. Active jobs were also associated with LTSA among women. The study confirms the demand-control model (job strain hypothesis) and social support and their associations with LTSA. However, the job strain hypothesis is more evident in the private sector. Active jobs with high psychological demands and high decision latitude seem to be problematic for many women, especially in the private sector. Thus, the active learning hypothesis receives no support for women in the Swedish working population in general.     

Trends in long‐term sickness absence in Sweden 1992–2008: the role of economic conditions,legislation, demography,work environment and alcohol consumption

Lidwall U, Marklund S. Trends in long‐term sickness absence in Sweden 1992–2008: the role of economic conditions, legislation, demography, work environment and alcohol consumption Int J Soc Welfare 2011: 20: 167©179 © 2010 The Author(s), International Journal of Social Welfare © 2010 Blackwell Publishing Ltd and the International Journal of Social Welfare. In Sweden, absence from work because of illness or injury has fluctuated considerably over time. This study aimed to identify potentially important factors behind variations in long‐term sickness absence. Aggregated data were used to assess factors correlated with the number of ongoing cases of sickness absence lasting more than 59 days. Trends were analysed using statistics from national social insurance records, labour force surveys and other official statistics. Although specific changes in the degree of generosity in the sickness insurance scheme were important in some cases, the results showed no consistent associations for the study period 1992–2008. Men were generally more sensitive to macroeconomic factors than women. Furthermore, compared with earlier findings, workforce composition had less impact on variations in long‐term sickness absence. Notably, public health indicators such as alcohol sales and working conditions were clearly related to long‐term sick leave during the period under investigation.     

On variants of shortest-path betweenness centrality and their generic computation

Betweenness centrality based on shortest paths is a standard measure of control utilized in numerous studies and implemented in all relevant software tools for network analysis. In this paper, a number of variants are reviewed, placed into context, and shown to be computable with simple variants of the algorithm commonly used for the standard case.     

Computationally efficient familywise error rate control in genome-wide association studies using score tests for generalized linear models

In genetic association studies, detecting phenotype–genotype association is a primary goal. We assume that the relationship between the data—phenotype, genetic markers and environmental covariates—can be modeled by a generalized linear model. The number of markers is allowed to be far greater than the number of individuals of the study. A multivariate score statistic is used to test each marker for association with a phenotype. We assume that the test statistics asymptotically follow a multivariate normal distribution under the complete null hypothesis of no phenotype–genotype association. We present the familywise error rate order k approximation method to find a local significance level (alternatively, an adjusted p-value) for each test such that the familywise error rate is controlled. The special case k=1 gives the Šidák method. As a by-product, an effective number of independent tests can be defined. Furthermore, if environmental covariates and genetic markers are uncorrelated, or no environmental covariates are present, we show that covariances between score statistics depend on genetic markers alone. This not only leads to more efficient calculations but also to a local significance level that is determined only by the collection of markers used, independent of the phenotypes and environmental covariates of the experiment at hand.     

Migration,Precarization and the Democratic Deficit in Global Governance

This article attempts to provide a critical understanding of the dual signification of “precarity”. It explores what “precarity” as a concept may potentially offer to studies of the changing contemporary political economy of migration. It discusses shifting trends in global migration and point to tendencies for a possible convergence between “South” and “North”, “East” and “West”. Based on a review of current advances in research, it discusses, with reference to the classical work of Karl Polanyi, the potential for a contemporary “countermovement” which would challenge the precarity of migrants. Bringing forward the issue of the “space for civil society” the article addresses a still lingering democratic deficit in the global governance of migration.

Policy Implications

The article is relevant to policymakers, trade unions and civil society organizations. It contributes to the understanding of policy making processes in emerging multilevel global governance and focuses on issues of precarization, migration, and the implementation and accountability of human, migrant and labour rights.     

The Post office feud: sensing urban disturbance in late eighteenth-century Copenhagen

Abstract

The so-called Post Office Feud was one of a series of popular protests and riots which took place in Copenhagen during the last decades of the eighteenth century. Compared to other similar events in the period, only a few, indirect hints to any explicit political discontent come through in contemporary representations of the disturbance, or in the subsequent investigations carried out by the authorities. On the contrary, it was the textualisation of sensory and emotional experiences that dominated the testimonials and written statements ensuing from the Post Office Feud. This article examines how the police, students, and other Copenhageners attached meaning to the disturbance by explaining the escalating violence in urban public space with reference to various sensory experiences.     

Longitudinal analysis of personal networks. The case of Argentinean migrants in Spain

This paper discusses and illustrates various approaches for the longitudinal analysis of personal networks (multilevel analysis, regression analysis, and SIENA). We combined the different types of analyses in a study of the changing personal networks of immigrants. Data were obtained from 25 Argentineans in Spain, who were interviewed twice in a 2-year interval. Qualitative interviews were used to estimate the amount of measurement error and to isolate important predictors. Quantitative analyses showed that the persistence of ties was explained by tie strength, network density, and alters’ country of origin and residence. Furthermore, transitivity appeared to be an important tendency, both for acquiring new contacts and for the relationships among alters. At the network level, immigrants’ networks were remarkably stable in composition and structure despite the high turnover. Clustered graphs have been used to illustrate the results. The results are discussed in light of adaptation to the host society.