A unique family survey was conducted in Nepal to investigate the economic consequences of having a first‐born girl. Women have more children, but we find no causal effect of number of children on economic outcomes, but independently of the number of children there is a positive effect on boys’ education of having a first‐born sister, who presumably takes care of household work so the boys can focus on school. This indicates a stronger son preference in Nepal than that found in studies from neighboring countries.