Estimating catch at age from market sampling data by using a Bayesian hierarchical model

Summary.  The paper develops a Bayesian hierarchical model for estimating the catch at age of cod landed in Norway. The model includes covariate effects such as season and gear, and can also account for the within-boat correlation. The hierarchical structure allows us to account properly for the uncertainty in the estimates.     

Divorce and Family Structure in Norway: Associations With Adolescent Mental Health

The aim of this study was to examine the association between family structure and adolecent mental health, after the considerable increase in divorced parents choosing joint physical custody (JPC) in Norway. Data stem from the youth@hordaland study, a population-based survey conducted in Norway in 2012. A total of 7,707 adolescents (47% male) 16 to 19 years old were included in this study. The adolescents were classified into 6 family structures. Mental health was measured using the Strengths and Difficulties Questionnaire (SDQ). No significant differences between nondivorced families (reference) and JPC were observed. Adolescents from single-parent and stepfather families scored significantly higher on all 3 SDQ scales, and adolescents from stepmother families scored significantly higher on the SDQ total and SDQ externalizing scales. In conclusion, the results of this study indicated that adolescents living in JPC did not have more adjustment problems compared to their peers living in nondivorced families.