Evaluate Consequences

Learning objectives

25 min · 234 words

◆Compare short-term and long-term effects of options.
◆Distinguish intended from unintended consequences.
◆Apply a simple decision matrix or pre-mortem to a real choice.

Two horizons

Evidence

Behavioral economics (Laibson, 1997) shows that people systematically overweight short-term outcomes and underweight long-term ones — 'hyperbolic discounting.' The correction is not to ignore the short term but to force both horizons into the comparison. For any serious option, ask: what does this look like in one week, one year, and ten years?

Intended and unintended

Historical

Robert K. Merton's 1936 essay on unintended consequences remains the standard reference. Any intervention in a complex system produces effects the designer did not aim for. Many of the worst decisions in history were not stupid at the target — they were blind to the side effects. Naming likely side effects before deciding is not pessimism; it is basic systems thinking.

The pre-mortem

Evidence

Gary Klein's pre-mortem technique asks the decider to imagine, in vivid detail, that the decision has already failed one year later, and to write the story of why. Studies (Mitchell, Russo, and Pennington, 1989) show this 'prospective hindsight' surfaces risks that ordinary planning misses by 30 percent or more. The exercise is fast, uncomfortable, and disproportionately useful.

A minimum-viable matrix

KAF Original

For most real decisions, a simple two-by-two is enough: rows for the top two or three options, columns for 'expected outcome' and 'worst plausible outcome.' Fill each cell in one sentence. This does not automate the decision; it makes the actual tradeoff visible so the choice can be honest.

Apply the framework

Practice · instant feedback

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Consequences over time
1. You are comparing two job offers. Which comparison best evaluates consequences?

Reflect before you answer

Saved to your Journal

1. Take a current decision. Fill a two-by-two: two options, columns for expected and worst-case outcomes. Which option is honestly the better bet?

2. Run a pre-mortem: assume the decision has failed a year from now. Write the story of why. What does that story change now?

Knowledge check

Answer all 3 to submit. 70% or higher to complete this lesson.