According to Jeffrey Sachs, the director of the Earth Institute, who co-edited the World Happiness Report with Richard Layard of the London School of Economics and John Helliwell of Canada's University of British Columbia, gains in GNP cannot alone promote happiness.
London School of Economics'ten Richard Layard ve Kanada'daki University of British Columbia'dan John Helliwell ile birlikte Dünya Mutluluk Raporunu hazırlayan Earth Institute müdürü Jeffrey Sachs'a göre, GSMH'daki kazanımlar tek başına mutluluğu artırmıyor.