Come one, come all

Aging is a complex process that involves the gradual functional decline of many different tissues and cells. Gene expression microarray analysis provides a comprehensive view of the gene expression signature associated with age and is particularly valuable for understanding the molecular mechanisms that contribute to the aging process. However, because of the stochastic nature of the aging process, animals of the same chronological age often manifest great physiological differences. Therefore, profiling the gene expression pattern of a large population of aging animals risks either exaggerating or masking the changes in gene expression that correspond to physiological aging. In a recent paper, Golden and Melov surveyed the gene expression profiles of individual aging Caenorhabditis elegans, hoping to circumvent the problem of variability among worms of the same chronological age. This initial analysis of age-dependent gene expression in individual aging worms is an important step toward deciphering the molecular basis of physiological aging.     

Determinants of work-family balance satisfaction during the pandemic: Insights from Québec

The first wave of the COVID pandemic was the most challenging for employed parents, and more specifically for women. In Québec, research has shown a deterioration in the psychological health of parents in the early weeks of the pandemic. In this research, we investigate how Québec parents who remained employed during the lockdown in 2020 perceived their work-family balance in the stressful context of new earning and caregiving constraints, drawing on survey data collected in May 2020. Our approach integrates insights from psychological, managerial and sociological literatures. We find that most parents who remained employed found their work-family balance “easy” in the first months of the pandemic, but women felt less satisfied with their work-family balance than men as well as those whose employers were less understanding and supportive, and those whose workloads increased. The implications of these results are discussed in the light of previous studies on work-family intersections, to show that gender continues to matter when family members are faced with extraordinary circumstances such as the closing of childcare and schools, even in the egalitarian context of Québec, where fathers are perceived as legitimate caregivers.     

Class Differences in Establishment Pathways to Fatherhood Wage Premiums

Organizations have been argued to favor fathers over childless men and skilled fathers over less‐skilled fathers, but group wage inequalities vary across as well as within establishments. This article theorizes class differences in the contribution of being employed in a high‐wage firm to the fatherhood wage premium. Analyses of linked employer–employee data from the Canadian Workplace and Employee Survey reveal that sorting into high‐wage establishments accounts for 60% of the economy‐wide premium for less‐educated and nonprofessional fathers, whereas high‐skilled fathers tend to work in lower wage establishments but receive the largest net fatherhood premium within firms. Among the subsample of fathers who changed employers in the past 5 years, less‐skilled fathers fared worse, whereas high‐skilled fathers sorted into high‐wage firms. Results thus suggest that employment in a higher wage firm likely enables less‐skilled men to transition to fatherhood, whereas high‐wage employers may discriminate in favor of only high‐skilled fathers in hiring.     

Bayesian gene set analysis for identifying significant biological pathways

We propose a hierarchical Bayesian model for analyzing gene expression data to identify pathways differentiating between two biological states (e.g., cancer vs. non-cancer and mutant vs. normal). Finding significant pathways can improve our understanding of biological processes. When the biological process of interest is related to a specific disease, eliciting a better understanding of the underlying pathways can lead to designing a more effective treatment. We apply our method to data obtained by interrogating the mutational status of p53 in 50 cancer cell lines (33 mutated and 17 normal). We identify several significant pathways with strong biological connections. We show that our approach provides a natural framework for incorporating prior biological information, and it has the best overall performance in terms of correctly identifying significant pathways compared to several alternative methods.     

Modelling Heterogeneity With and Without the Dirichlet Process

We investigate the relationships between Dirichlet process (DP) based models and allocation models for a variable number of components, based on exchangeable distributions. It is shown that the DP partition distribution is a limiting case of a Dirichlet–multinomial allocation model. Comparisons of posterior performance of DP and allocation models are made in the Bayesian paradigm and illustrated in the context of univariate mixture models. It is shown in particular that the unbalancedness of the allocation distribution, present in the prior DP model, persists a posteriori . Exploiting the model connections, a new MCMC sampler for general DP based models is introduced, which uses split/merge moves in a reversible jump framework. Performance of this new sampler relative to that of some traditional samplers for DP processes is then explored.     

Mobilität oder Immobilität?

An ongoing controversy in transformation research concerns the relative importance of firm-internal versus occupational segmentation in the former German Democratic Republic (GDR) employment system compared to the West German system. In a first step, institutions of vocational education and of the employment system focusing on their impact on labor market segmentation are analyzed. Then, the occupational careers of different birth cohorts of East and West Germans are examined. Empirical results show that the importance of internal mobility increased over time in the GDR. But this change cannot primarily be attributed to personnel policies of firms. It was mainly due to social policies, i.e. the introduction of compulsory army service and of maternity leave, since companies were obliged to take the army recruits and mothers back afterwards. Obviously, the way social policies were institutionalized affected the levels of labor market mobility in both countries more than changes of employment strategies.     

Why is Housing Always Satisfactory? A Study into the Impact of Preference and Experience on Housing Appreciation

This study focuses on residents’ perceptions of residential quality concerning 23 different dwelling aspects. Respondents were asked to indicate their appreciation of these dwelling aspects on a scale ranging from 0 (“extremely unattractive”) to 100 (“extremely attractive”). The influence of two potential factors on the appreciation of dwelling aspects is examined: (1) preference and (2) experience. It was hypothesized that residents who live according to their preferences give higher appreciation scores than residents who do not. This should even apply to low-quality housing. Furthermore, it was argued that residents appreciate their current housing situation more than residents who do not live in that particular housing situation. This effect should be independent of preference. The impact of both preference and of experience could be confirmed. The results also showed an interaction effect between preference and experience: the positive effect of experience on appreciation is larger in residents who live in a housing situation that they do not prefer. This result would be expected if the impact of experience works to decrease the ‘gap’ in residential satisfaction due to the discrepancy between what residents have and what they want. In conclusion, why is housing always satisfactory? In this paper, housing is satisfactory because the ‘gap’ between what residents want and what they have is small; residents seem to have realistic aspirations. Furthermore, residents appreciate what they already have, even if this is not what they prefer.     

On the Sunny Side of Life: Sunshine Effects on Life Satisfaction

This paper seeks to analyze the influence of the weather on a person’s self-reported life satisfaction. On a theoretical level, it is claimed that ‘nice’ weather can improve the affective well-being of a person. Given this, it is argued that affects can, in turn, have an impact on that person’s general assessment of his or her life. In particular, it is expected that people would report a higher life satisfaction on days with unambiguously ‘nice’ weather. Data from three German large-scale surveys are used to test empirically to what extent self-reported life satisfaction is determined by the weather. All in all, the results are mostly consistent with the initial hypothesis. In all three samples those respondents surveyed on days with exceptionally sunny weather reported a higher life satisfaction compared to respondents interviewed on days with ‘ordinary’ weather. In two out of three samples, this difference was statistically significant. Hence, the supposed sunshine effect on peoples’ life satisfaction does indeed exist. Implications of these findings are discussed in a conclusion.     

Doing Well by Reporting Good: Reporting Corporate Responsibility and Corporate Performance

This article aimed to examine the impacts of reporting‐type corporate responsibility activities (CRA‐R) on corporate social and financial performance. Academic research has explored how varying attributes of markets, industry sectors and firms might shape corporate social and financial performance, but includes little effort to examine the impacts of different kinds of CRA on corporate performance. We build on debate about the value of firms' reporting activities related to corporate responsibility. Recent literature suggests that CRA‐R is superficial marketing or “greenwashing.” Despite this viewpoint, corporate reporting activities related to responsibility are rising. In order to solve this puzzle, this article explores the impact of CRA‐R on corporate performance. First, drawing from the institutional perspective, we propose that CRA‐R will positively impact corporate social performance (CSP) oriented toward secondary stakeholders. Second, combining the stakeholder–agency perspective and corporate responsibility literature, we motivate the hypotheses that CRA‐R positively influences corporate financial performance (CFP). Empirical testing with a unique dataset of large US corporations selected in the Fortune 500 support the proposed hypotheses. In particular, both corporate social responsibility and Global Reporting Initiative (GRI) activities positively influence corporate environmental performance, and financial performance. In particular, GRI reporting is a strong indicator to impact both social and financial performance. Our findings indicate that CRA‐R should not simply reflect shallow motivations, but deliver value to noninvestor stakeholders as well as investors.