- How is overconfidence measured? How can it be dangerous for financial decision-makers?

- . In a Ponzi scheme, named after Charles Ponzi, investors are paid profits out of money paid by subsequent investors, instead of from revenues generated by a real business operation. Unless an ever-increasing flow of money from investors is available, a Ponzi scheme is doomed to failure. Whats the difference between a Ponzi scheme and an asset price bubble? Are there any similarities?