Sibling rivalry: parents favour older children and daughters, study finds

International research also reveals conscientious or agreeable children are likely to receive preferential treatment

As Philip Larkin once noted, your mum and dad have a lasting effect on you. Now, researchers have revealed which siblings in a family are more likely to be favoured: it is bad news for sons.

Researchers have found daughters, older children and those who are more conscientious or agreeable are likely to receive preferential treatment.