Jimmy Buffet was a super-spreader of happiness

There’s a reason the name “Jimmy Buffett” elicits immediate joy in the hearts of millions: happiness contagion.

A study conducted by Harvard University and the University of California followed 5,000 people for 20 years to determine if happiness was contagious.

The study’s finding: it most certainly is.

If you smile at a stranger as you hold a door open for him, you transfer a positive, happy ener...