The World's Happiness Report places Estonia on the 73rd position in the world for citizen well-being, ahead of Latvia, but behind Lithuania and Russia.
The World Happiness Report was first compiled in 2012. The third annual report was once again topped by Switzerland, followed by Iceland, Denmark, Norway and Canada.
On the opposite end of the 158-country index are Togo, Burundi, Syria, Benin and Rwanda.
Estonia placed 73rd, its score 5.429 (out of 10) only 0.003 points better than achieved last time.
Happiness levels in Estonia's closest neighbors vary greatly. Whereas Finland and Sweden are in the top then - 6th and 8th respectively, Latvia placed 89th.
The study bases its rankings on data from the Gallup World Poll and takes into account variables such as real GDP per capita, healthy life expectancy, corruption levels and social support and personal freedom.
"Happiness is increasingly considered a proper measure of social progress and a goal of public policy," the report said. "Sustainable development is a normative concept calling for all societies to balance economic, social, and environmental objectives in a holistic manner. When countries pursue GDP in a lopsided manner, forgetting about social and environmental objectives, the results can be adverse for human well-being."
Editor: M. Oll