Wednesday, September 24, 2008

Making Actuaries Less Human

Making Actuaries Less Human

Work by psychologists suggests
that, as human beings, actuaries are subject to a variety of mental biases and decision
making errors. The field of behavioural finance looks at how such biases affect
financial decisions.

This paper first looks at a selection of these biases including how:

  • decisions are often made by adjusting from an existing position
    (anchoring)
  • people are risk averse when facing gains but become risk seeking when
    facing losses (prospect theory)
  • the framing of a problem can materially impact the decision that is made
  • the frequency with which something is monitored can impact the decision
    (myopic loss aversion)
  • people have a tendency to ignore underlying probability distributions
  • almost everybody is overconfident
  • when a number of different options are presented, the number, order and
    degree of difference between the options will affect which option is
    chosen.
  • the use of separate mental accounts impacts financial decisions (mental
    accounting)