Decision Making

Expected Value

TL;DR: A decision can be right even if the outcome is bad — and wrong even if you got lucky.

Study Order Decision Making #14 Expected Value
Why it matters

This protects you from judging decisions purely by what happened afterward.

How to use it
  • Multiply payoff by probability.
  • Compare alternatives.
  • Respect downside, not just average outcome.
Real-life example

An investor may back ten startups knowing several will fail because the payoff distribution still makes the bet rational.

Where people screw it up

Confusing confidence with edge.

Bottom line

A decision can be right even if the outcome is bad — and wrong even if you got lucky.