We found that differences between marriage and cohabitation tend to be small and dissipate after a honeymoon period. Also while married couples experienced health gains — likely linked to the formal benefits of marriage such as shared healthcare plans — cohabiting couples experienced greater gains in happiness and self-esteem. For some, cohabitation may come with fewer unwanted obligations than marriage and allow for more flexibility, autonomy, and personal growth” said Musick.

Compared to most industrial countries America continues to value marriage above other family forms,” concluded Musick. “However our research shows that marriage is by no means unique in promoting well-being and that other forms of romantic relationships can provide many of the same benefits