Book summary: Thinking in Bets

Thinking in Bets
Decision Theory Model

Overview

  • Good quality decisions do not always yield good outcomes
  • All decision makings in real life are made under uncertainty. All decisions are essentially bets about the future
  • Decisions made in Chess are not made under uncertainty because every single permutation can be pre-computed unlike Poker.
  • Most real life decisions are not zero-sum games

On outcomes

  • Real life outcomes are probabilistic
  • Outcomes are influenced primarily by the quality of our decision (skill) and luck
  • While the outcomes might not always be positive, having a process in place to constantly improve the quality of decision making will tilt the odds in our favor

Implications

  • Do not change strategy drastically just because a few hands did not turn out well in the short run
  • For each premise understand what the base rate is
  • Learn to be at peace with not knowing
  • Recognize the limits of our own knowledge
  • A great decision is a result of a good process. A good process attempts to accurately represent our own state of knowledge
  • Watching: It is free to learn from other people’s experience

Cognitive biases that impede good decision

  • Decisions are the outcomes of our beliefs
  • Hindsight bias impedes against quality decision making
  • Guard against black or white decision making
  • Availability bias means lagging any prior conflicting data, our default setting is to believe what we hear is true
  • Selective bias and consistency bias, means we are unwilling to change our mind despite contrary signals from the environment
  • Avoid attribution bias

Related Readings

  • Theory of Games and Economic Behavior, Jon Von Neumann
  • Ignorance: How it drives Science, Stuart Firestein
  • Stumbling on Happiness, Daniel Gilbert

Leave a Reply