Comment Comment by jcampbell1 This is interesting. They seem to think it is in utero effect. Maybe Vitamin D?I wondered if they considered if the cause is age when starting school. I know that birth month has pretty powerful effects for educational attainment. parent jcampbell1 11 years ago
I wondered if they considered if the cause is age when starting school. I know that birth month has pretty powerful effects for educational attainment.