|Intelligence||IQ tests in general population samples completed with estimates based on observations in comparable countries||1950-99||IQ_50.90s||107||Lynn & VanHanen 2002 table 6.5|
|1964-1998||IQ_2006||192||Lynn & VanHanen 2006 table 4.3|
The dataset States of Nations is about characteristics of countries in periods (macro variables). It is part of the World Database of Happiness. Though developed for the identification of societal conditions for happiness, the source can also be used for other purposes.