Danish DNA could be linked to happiness

Genetics could be the key to explaining nation’s levels of happiness, according to research.

Economists at the University of Warwick’s Centre for Competitive Advantage in the Global Economy (CAGE) have looked at why certain countries top the world happiness rankings. In particular, they have found the closer a nation is to the genetic makeup of Denmark, the happier that country is.

Danish DNA could be linked to happiness

Denmark: World happiness leader

The University’s research could help to solve the puzzle of why a country like Denmark so regularly tops the world happiness rankings.

Dr Eugenio Proto and Professor Andrew Oswald, based in the Department of Economics, found three forms of evidence for a link between genetic makeup and a nation’s happiness.

First, they used data on 131 countries from a number of international surveys including the Gallup World Poll, World Value Survey and the European Quality of Life Surveys. The researchers linked cross-national data on genetic distance and well-being.

“The results were surprising, we found that the greater a nation’s genetic distance from Denmark, the lower the reported well-being of that nation,” Dr Proto said. “Our research adjusts for many other influences, including Gross Domestic Product, culture, religion and the strength of the welfare state and geography.

The second form of evidence looked at existing research suggesting an association between mental well-being and a mutation of the gene that influences the reuptake of serotonin, which is believed to be linked to human mood.

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“We looked at existing research which suggested that the long and short variants of this gene are correlated with different probabilities of clinical depression, although this link is still highly debated. The short version has been associated with higher scores on neuroticism and lower life satisfaction,” Dr Proto said. “Intriguingly, among the 30 nations included in the study, it is Denmark and the Netherlands that appear to have the lowest percentage of people with this short version.”

The final form of evidence looked at whether the link between genetics and happiness also held true across generations, continents and the Atlantic Ocean.

“We used data on the reported well-being of Americans and then looked at which part of the world their ancestors had come from,” said Professor Oswald. “The evidence revealed that there is an unexplained positive correlation between the happiness today of some nations and the observed happiness of Americans whose ancestors came from these nations, even after controlling for personal income and religion.”

He added, “This study has used three kinds of evidence and, contrary to our own assumptions when we began the project, it seems there are reasons to believe that genetic patterns may help researchers to understand international well-being levels.

“More research in this area is now needed, and economists and social scientists may need to pay greater heed to the role of genetic variation across national populations.”

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