The person in charge of the survey is Maria Solevid, at Gothenburg's SOM institute. Her project involved polling 2,668 people in 103 countries.
She tells Radio Sweden that Swedes abroad tend to have emigrated in order to work, and that it is possible they are happier because they are living their dreams - in countries like America, Britain, Norway and Denmark.
Of the Swedes polled, 51 percent abroad say they are very happy with their lives, compared with 38 percent of people in Sweden.
Most Swedes abroad have moved for work: 45 percent. Others have moved to be with family or a partner, (33 percent) or because their family moved /23 percent).
But 60 percent of those polled say they would consider moving back to Sweden.
Listen to the interview for more details.
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