Veenhoven, R.

happiness 7-2-2003 world database finding study sample statistic measurement report authors label relation population question value non-response world remark error estimates satisfaction nation database income measure subject www.eur.nl o-slw print 7-2-2003 correlational elaboration /remark classification author label <.001 scale class level query status university estimate household error health selfreport <.01 family children research quality veenhoven people correlation erasmus university rotterdam rating subject code 18+ <.05 print date household income education personality change score sample non-response difference well-being marriage point indicator attitude world database netherland o-slu number country 42 nations feeling indicators research activity