Family Complexity and Parents’ Migration: The Role of Repartnering and Distance to Non-Resident Children

Recent research suggests that the increasing complexity of family life could be a factor in declines in internal migration (long-distance moves within countries). As many separated parents continue to share childcare responsibilities or have visiting arrangements, their mobility is naturally constrained. However, the relationship between family complexity and individual migration behaviour has never been studied explicitly. We compare separated parents with parents in two-parent families in their likelihood of migrating within the Netherlands. We use detailed records of parents’ partnership status and children’s residential situation. An event-history analysis was performed using register-based population data (N = 442,412). We find that separated, single parents are more likely to migrate than those in two-parent families. The same is true for repartnered mothers, while repartnered fathers are about as likely to migrate as fathers in two-parent families. Separated parents’ migration behaviour depends on where their children live. Having non-resident children who live some distance away is associated with a much higher likelihood of migrating than having resident children or non-resident children who live nearby. Having both resident and non-resident children who live nearby—shared residence (i.e. joint physical custody) is likely common in this situation—is associated with a considerably lower likelihood of migrating than having resident children only. Based on our findings, one would expect family complexities stemming from parental separation to be associated with higher rather than lower levels of migration. However, potential future increases in the number of parents who share physical custody after separation might lead to lower migration levels.

Gene Family Complexity and Expression Divergence as a Mechanism of Adaptation In Coral

Gene family complexity and its influence on expression dynamics has long been theorized to be an important source of adaptation in natural systems through providing novel genetic material and influencing gene dosage. There is now growing empirical support for this theory; however, this process has only been demonstrated in a limited number of systems typically using recently diverged species or populations. In particular, examples of how this process operates in basal animals with deeper species splits has not been well explored. To address this issue, we investigated the evolution of gene family complexity in five species of common Caribbean coral. We demonstrate widespread divergence in gene repertoires owing to slow rates of gene turnover occurring along deep species splits. The resulting differences in gene family complexity involve numerous biologic processes, shedding light on to the selective forces that have influenced the evolution of each species. By coupling these findings with gene expression data, we show that increased gene family complexity promotes increased expression divergence between species, indicating an interplay between gene family complexity and expression divergence. Finally, we show that immune genes are evolving particularly fast demonstrating the importance of interactions with other organisms in the evolutionary history of Caribbean corals. Overall, these findings provide support for gene copy number change as an important evolutionary force in Caribbean corals, which may influence their ability to persist in a rapidly changing environment.

Constructions of pseudorandom binary lattices using cyclotomic classes in finite fields

In 2006, Hubert, Mauduit and Sárközy extended the notion of binary sequences to n-dimensional binary lattices and introduced the measures of pseudorandomness of binary lattices. In 2011, Gyarmati, Mauduit and Sárközy extended the notions of family complexity, collision and avalanche effect from binary sequences to binary lattices. In this paper, we construct pseudorandom binary lattices by using cyclotomic classes in finite fields and study the pseudorandom measure of order k, family complexity, collision and avalanche effect. Results indicate that such binary lattices are “good,” and their families possess a nice structure in terms of family complexity, collision and avalanche effect.

Perceptions of Closeness in Adult Parent–Child Dyads: Asymmetry in the Context of Family Complexity

Objectives Multi-actor data show that parents’ and adult children’s evaluations of their relation do not necessarily match. We studied disagreement in parent- and child-reported closeness, comparing parent–child dyads involving separated parents, non-separated parents, and stepparents to shed new light on today’s diverse landscape of adult parent–child relations. Method Using data from the Parents and Children in the Netherlands (OKiN) survey, we analyzed closeness in parent–child dyads (N = 4,602) comparing (step)parents’ and their adult children’s (aged 25–45) reports. To distinguish directional disagreement (i.e., differences in child- and parent-reported means) from nondirectional disagreement (i.e., the association between child- and parent-reported measures), while accounting for absolute levels of closeness, we estimated log-linear models. Results All types of parents tend to report higher levels of closeness than their children. Whereas parental overreport is more prevalent among biological father–child dyads than among biological mother–child dyads, we found no differences between biological dyads and stepdyads. The association between children’s and parents’ reports is higher among dyads involving stepmothers or married mothers than among those involving separated mothers and (step)fathers. Discussion The intergenerational stake (i.e., parental overreport) is not unique to biological parent–child relations. Instead, patterns of disagreement seem most strongly stratified by gender.

Heterogeneity in family firms: contextualising the adoption of family governance mechanisms

PurposeThis research is aimed to better understand what characteristics of family firms create a context in which family governance systems are more frequently adopted.Design/methodology/approachWe analyse a sample of 490 Spanish family businesses using cluster analysis, and we identify four different types of family businesses whose characteristics are associated to the adoption of different family governance systems, i.e. family councils and family protocols. The comparison between clusters of the baseline parameters was performed using one-way analysis of variance (ANOVA) for parametric variables, the χ2 test for parametric variables and Kruskal-Wallis for nonparametric variables. By conducting between-profile analysis of covariance (ANCOVA), we tested for differences in the dependent variables (i.e. the existence of family councils and/or existence of family protocols) between the clusters, using cluster membership as the independent variable.FindingsTaking into account the characteristics of family firms in terms of ownership structure, management involvement, and family and organizational complexity, we identify four different contexts that create different communication needs and are related to the use of different family governance mechanisms. We characterize the different contexts or types of family firms as: founder-centric, protective, consensual and business-evolved. Our findings show that family protocols are associated to contexts with high family involvement in management and family complexity, while family councils are more frequent when there is a separation of managerial and ownership roles and there is a high organizational and family complexity.Research limitations/implicationsThe study highlights the value of social systems theory in order to explain the association between the characteristics of different firm types and contexts, and the use of family councils and family protocols to govern the relationship between the owner family and the business.Practical implicationsFamily governance mechanisms are widely recommended by practitioners and scholars. However, they are usually adopted only by a small percentage of family firms. This study helps to better understand what family governance systems may be more appropriate in different contexts and relativize the necessity of these governance mechanisms in function of the communication needs created within each context.Social implicationsThe improvement of family governance mechanisms helps to increase the likelihood of survival and durability of family firms. These firms contribute to more than 60% of employment in most developed countries. Consequently, good governance in family firms has social implications in terms of labour conditions and stability.Originality/valueMost family firms don't use family protocols or family councils to govern the relationship between the owner family and the firm. However, little is known about the reasons for this lack of structuration of the family-firm relationship. Using social systems theory, our research contributes to better understand the conditions in which business families are more prone to use structured forms to manage this relationship, as well as the reasons that may be constraining their adoption.