Skip to main content

☝🏻 Decision Making

Some principles and laws to keep in mind when making decisions:

When a measure becomes a target, it ceases to be a good measure.

Goodhart's law

The more any quantitative social indicator is used for social decision-making, the more subject it will be to corruption pressures and the more apt it will be to distort and corrupt the social processes it is intended to monitor.

Campbell's law

Incentives can backfire: rewards for a behavior may encourage worse outcomes.

Cobra effect

Attempts to suppress information often amplify attention to it.

Streisand effect

People with low competence tend to overestimate their ability.

Dunning–Kruger effect

Employees are promoted until reaching a role where they’re less competent.

Peter principle

Teams spend disproportionate time on trivial matters over important ones.

Law of triviality

With a favorite tool at hand, every problem looks like a nail.

Law of the instrument

After some point, each extra input yields smaller gains.

Diminishing returns

Actions often produce outcomes that were not intended.

Unintended consequences

Prefer simpler explanations that adequately fit the facts.

Occam's razor

Models that fit training data too closely perform poorly on new data.

Overfitting

Bad Decision vs Bad Luck​

At each choice point along the chain, ask four questions:

  1. Was the relevant information available when I decided?
  2. Did I consider this risk and accept it knowingly? If so, that’s a priced-in risk, not a mistake.
  3. Would gathering more information have been cheap at the time?
  4. With the same information, would I make the same choice again?
  • yes, no, yes, no -> it was a bad decision.
  • no, yes, no, yes -> it was bad luck.

The tiebreaker: track it over time. A single event can’t separate luck from a decision. If “bad luck” keeps landing in the same place, it isn’t luck.

Bottom Line​

Improvise, Adapt, Overcome