Discounting of monetary rewards that are both delayed and probabilistic: delay and probability combine multiplicatively, not additively
Journal of Experimental Psychology Learning Memory and Cognition (2015) - Comment
pubmed: 24933696  doi: 10.1037/xlm0000029  issn: 1939-1285  issn: 0278-7393 

Ariana Vanderveldt, Leonard Green, Joel Myerson