Links
What is this World Database of Happiness: https://worlddatabaseofhappiness.eur.nl/this-database/what-is-this-world-database-of-happiness-2/
Uses of the World Database of Happiness: https://worlddatabaseofhappiness.eur.nl/this-database/uses-of-this-database/
On-line findings archive: A new tool for research synthesis: http://journalijisr.com/sites/default/files/issues-pdf/IJISRR-728.pdf
Homepage Ruut Veenhoven: https://personal.eur.nl/veenhoven