It seems to be a fairly general principle that when making choices among alternatives that involve a certain amount of risk or uncertainty, we prefer a small, sure gain to a larger, uncertain one. Most of us, for example, will choose a sure $100 over a coin flip (a fifty-fifty chance) that determines whether we win $200 or nothing. When the possibilities involve losses, however, we will risk a large loss to avoid a smaller one. For example, we will choose a coin flip that determines whether we lose $200 or nothing over a sure loss of $100.
