Norway that allows us to precisely measure birth order effects on IQ using both cross-sectional and within-family methods … explains about 3% of the within-family variance of IQ. When we control for birth endowments, the estimated birth order effects … birth order effects occur because later-born children are more affected by family breakdown. …

Norway and focuses on one family characteristic: the effect of family size on IQ. Because of the endogeneity of family size …, we instrument for family size using twin births and sex composition. IV estimates using sex composition as an instrument … show no negative effect of family size; however, IV estimates using twins imply that family size has a negative effect on …

non-economic factors such as family ties are very important for the decision to migrate. Workers are less likely to move … if they have family in the region where they already live, and job loss stimulates workers to relocate with parents and …. Furthermore, when looking at long-run family income, we find that the difference between displaced movers and stayers is very …

' working hours is amplified through the influence of family peers. Using Norwegian administrative data we study the long …-run influence of the family network on mothers' labour decisions up to seven years post birth. For identification, we exploit … partially overlapping peer groups and assume that a mother interacts with her neighbours and family but not with her family …