'Waste not want not' expresses our culture's aversion to waste. 'I could have gotten the same thing for less' is a sentiment that can diminish pleasure in a transaction. We study people's willingness to 'pay' to avoid this spoiler. In one scenario, participants imagined they were looking for a...

We propose a model of instrumental belief choice under loss aversion. When new information arrives, an agent is prompted to abandon her prior. However, potential posteriors may induce her to take actions that generate a lower utility in some states than actions induced by her prior. These losses...

Emotions were central to the development of economics, especially in utility theory in classical economics. While neoclassical utility theory basically abolished emotions, behavioural economics more recently reintroduced emotions in utility theory. Beyond utility theory, economic theorists use...