Chang, Yen-Ping; Lin, Yi-Cheng; Chen, Lung - In: Journal of Happiness Studies 13 (2012) 5, pp. 761-781
Based on the framework of the broaden-and-build theory (Fredrickson in Philos Trans R Soc B Biol Sci 359(1449):1367, <CitationRef CitationID="CR18">2004a</CitationRef>, <CitationRef CitationID="CR19">b</CitationRef>), we proposed that the emotion of gratitude generates upstream reciprocity (UR, which is helping an unrelated third party after being helped) by broadening the...</citationref></citationref>