Hapiness - who is happy?

Edward Diener (born in 1946 in Glendale, California) is an American psychologist, professor, and author. 

Ed Diener is noted for his research over the past twenty-five years on happiness - the measurement of well-being; temperament and personality influences on well-being; theories of well-being; income and well-being; and cultural influences on well-being.

http://www.echocredits.org/downloads/2794689/Who.is.Happy.pdf