The relative age effect associated with cut-off dates for hockey eligibility has been an ongoing debate in certain academic circles and in the popular media. The effect is primarily found in Canadian Major Junior Hockey, where a disproportionate share of birthdays fall in the first three months of the year. But when the National Hockey League rosters of Canadian-born players are examined, the pattern is less pronounced. Using publically available data of hockey players from 2000-2009, we find that the relative age effect, as described by Nolan and Howell (2010) and Gladwell (2008), is moderate for the average Canadian National Hockey League player and reverses when examining the most elite professional players (i.e. All-Star and Olympic Team rosters). We also find that the average career duration is longer for players born later in the year. In sum, there is a surprising 'relative age effect reversal' that occurs from the junior leagues to the most elite level of hockey play. This supports an 'underdog' hypothesis, where the relatively younger players are thought to benefit by more competitive play with their older counterparts.

Like many sports in adolescence, junior hockey is organized by age groups. Typically, players born after December 31st are placed in the subsequent age cohort and as a result, will have an age advantage over those players born closer to the end of the year. While this relative age effect (RAE) has been well-established in junior hockey and other professional sports, the long-term impact of this phenomenon is not well understood. Using roster data on North American National Hockey League (NHL) players from the 2008–2009 season to the 2015–2016 season, we document a RAE reversal—players born in the last quarter of the year (October-December) score more and command higher salaries than those born in the first quarter of the year. This reversal is even more pronounced among the NHL “elite.” We find that among players in the 90th percentile of scoring, those born in the last quarter of the year score about 9 more points per season than those born in the first quarter. Likewise, elite players in the 90th percentile of salary who are born in the last quarter of the year earn 51% more pay than players born at the start of the year. Surprisingly, compared to players at the lower end of the performance distribution, the RAE reversal is about three to four times greater among elite players.

Drawing upon a conceptual framework proposed by Doherty and colleagues (1998), we examine the association between father residence during adolescence and early paternity and residency for a sample of young adult men. Our data are from the National Survey of Adolescent Males (Waves I, III)-a representative sample of young adult men in the U.S., aged 21 to 27 in 1995. Using multinomial logistic techniques, we find that living with a father during adolescence reduces the odds that young men experience fatherhood at an early age. In addition, living with a biological father as a teen, increases the odds that young adult fathers reside with their children. The association between living with a father as a teen and early paternity and child residency is attenuated by background characteristics and current education and work status.

In intense academic environments such as in South Korea, students experience extreme levels of academic stress. This stress peaks as students prepare for the college entrance exam in the final year of high school. Stress is associated with a host of negative outcomes, and academic stress is the leading cause of suicidal ideation among youth in South Korea. Research suggests that in high-stress contexts such as this, social capital can improve academic success and mental health, while reducing risky or deviant behaviors. However, this research has predominantly focused on Western contexts. Because of the unique intensity of educational pursuits and intense investment in education by parents, South Korea provides a compelling case for research on the effects of family and school social capital on youth academic stress. Using data from the Korea Youth Panel Survey (N = 2753), we find that particular components of family and school social capital can both reduce and exacerbate academic stress. While measures of closeness and connection to parents reduced academic stress, school social capital had a limited impact on academic stress. Furthermore, there may be a limit to the effectiveness of social capital to help with academic stress before it becomes too much of a good thing.

Child behavior problems are associated with an array of negative outcomes that can continue into adulthood. Because much of the social development and adjustment for children in early to middle childhood takes place in the home, families are of special interest in understanding child behavioral problems. Past research suggests an association between more stable family structures and healthier child behavioral outcomes. However, much of the research assessing behavioral outcomes has overlooked more complex family structure types and trajectories or has not considered how finer measures of family structure may clarify the connection between family structure and child behavior. Using the Millennium Cohort Study (MCS), a longitudinal study of children in the United Kingdom, we examine the relationships between various types of family structure stability and instability on child internalizing and externalizing behavior problems. Our results suggest that internalizing behavioral problems differ only slightly across all eight family structure trajectories and are instead explained by differences in other family characteristics such as stress and parental selectivity. Conversely, we find that family structure and trajectories of family structure change are associated with child externalizing problems, independent of other family characteristics. Despite the increase in frequency and normalization of non-traditional family structures in the UK, such as cohabitation, single parent and stepparent families, we find that children in stable married families experience fewer externalizing behavior problems compared to children in other family structures.