Economics of forgetting
Maybe not what you are looking for, but a related concept is regret. Orphanides and Zervos (1995) is a classic paper on rational regret in a health economics concept http://www.jstor.org/discover/10.2307/2138580?uid=3739840&amp;uid=2&amp;uid=4&amp;uid=3739256&amp;sid=21106216442271 

There's also plenty of irrational regret papers, mostly just boiling down to hyperbolic discounting models.