London | When it comes to money buying happiness, more is better. That’s according to new research from a senior fellow at the Wharton School who has argued that the correlation between wealth and wellbeing does not plateau once incomes reach a certain point.

Matthew Killingsworth, who studies the causes of human happiness, said both millionaires and billionaires are significantly happier than people earning more than $US500,000 ($745,700) a year in an update to a study published last year that argued against the notion of a so-called “happiness plateau”.

Bloomberg Wealth