Distributed By Christian Hoffeldt
There is a variety of reports, and they have very different vectors.
The report we use is The World Happiness Report published by the United Nations Sustainable Development Solutions Network.
(The first report in 2012, the second in 2013, and the third on April 23, 2015.)
The 2015 report: http://worldhappiness.report/wp-content/uploads/sites/2/2015/04/WHR15-Apr29-update.pdf