On the friendship paradox and inversity: A network property with applications to privacy-sensitive network interventions.

We provide the mathematical and empirical foundations of the friendship paradox in networks, often stated as "Your friends have more friends than you." We prove a set of network properties on friends of friends and characterize the concepts of ego-based and alter-based means. We propose a network property called inversity that quantifies the imbalance in degrees across edges and prove that the sign of inversity determines the ordering between ego-based or alter-based means for any network, with implications for interventions.

You are only as safe as your riskiest contact: Effective COVID-19 vaccine distribution using local network information.

When vaccines are limited, prior research has suggested it is most protective to distribute vaccines to the most central individuals - those who are most likely to spread the disease. But surveying the population's social network is a costly and time-consuming endeavour, often not completed before vaccination must begin. This paper validates a local targeting method for distributing vaccines.

Human social sensing is an untapped resource for computational social science.

The ability to 'sense' the social environment and thereby to understand the thoughts and actions of others allows humans to fit into their social worlds, communicate and cooperate, and learn from others' experiences. Here we argue that, through the lens of computational social science, this ability can be used to advance research into human sociality. When strategically selected to represent a specific population of interest, human social sensors can help to describe and predict societal trends.

Do Positive Feelings Hurt? Disaggregating Positive and Negative Components of Intergenerational Ambivalence.

Ambivalence has become an important conceptual development in the study of parent-adult child relations, with evidence highlighting that intergenerational relationships are characterized by a mix of positive and negative components. Recent studies have shown that ambivalence has detrimental consequences for both parents' and adult children's psychological well-being. The underlying assumption of this line of research is that psychological distress results from holding simultaneous positive and negative feelings toward a parent or child.

When a man hits a woman: moral evaluations and reporting violence to the police.

We use experimental data from a nationally representative sample to examine whether gender and the victim's relationship to the offender affect attitudes about the seriousness of the offense and whether the offense should be reported to the police. We find that respondents are particularly likely to condemn men's assaults on women, and to favor reporting them. The pattern appears to reflect both greater moral condemnation of men's assaults on women and the belief that the victims of these assaults are in greater danger.