In twelve sessions conducted in a typical bubble-generating experimental environment, we design a pair of assets that can detect both irrationality and speculative behavior. The specific form of irrationality we investigate is probability judgment error associated with low-probability,...

We apply an event-study methodology on over 10,000 Morningstar star rating changes and find that Morningstar has substantial independent influence on the investment allocation decisions of retail mutual fund investors. It is the discrete change in the star rating itself, and not the change in...