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.
Prema Jeffreyu Sachsu, ravnatelju Instituta za Zemlju, koji je uredio Izvješće o sreći u svijetu, zajedno s Richardom Layardom s Londonske ekonomske škole i Johnom Helliwellom s kanadskog Sveučilišta Britanske Columbije, rast BNP-a ne može sam po sebi promicati sreću.