A number of recent papers on double-blind dictator games have obtained significant generous behavior when information regarding the recipient or any other social context is provided. In contrast, the lack of information discourages other-regarding behavior and the subject’s behavior closely...

We study individual decision making in a lottery-choice task performed by three subject populations: gamblers under psychological treatment (“addicts”), gamblers’ relatives (“victims”), and normal (as far as gambling is considered) individuals. We find that addicts are willing to take...