This is a link to a draft. Here is a link to the published version: Norton, Michael I., Daniel Mochon, and Dan Ariely. 2012. “The IKEA Effect: When Labor Leads to Love.” Journal of Consumer Psychology 22 (3) (July): 453–460. https://dash.harvard.edu/bitstream/handle/1/12136084/norton%20mochon%20ariely%20third%20round%5b1%5d.pdf?sequence=3
Although I am also still somewhat dubious, especially considering the age of the references in this paper.