The law of DMU is pretty old and well accepted. The MU is usually taken to be monotonically decreasing. We took a survey on this and found that contrary to monotonic decrease it has an initial bump before the monotony. The published paper is uploaded.
Comments and discussions on this paper are welcome.
https://www.researchgate.net/publication/348351620_Hidden_Subjective_Aspects_in_the_Law_of_Diminishing_Marginal_Utility_The_Initial_Bump_and_Limitations_of_Neuroeconomics?_sg=C1xQXThbrieABsYNEqbuw9diBYwoU0XK8H9lgoemNFyVRD0b0VPfkRsjqmVPDz-CIhSEMHs9fdKuqLA1Y0IrngKHtxk7YpnLMpwEHnCF.DrEgTN6KbNLn6Fr7V7mFsuENgDAxHsPcAN0VmwTOln41bXGZjnWHjFs6tVUq1WS4QtYju2GP_hJP0hWgS72Jcg