Actively watch for escalation of commitment
Each new investment in a losing course makes the next exit harder — catch escalation early.
Why it works
Staw’s research on escalation of commitment shows that decision-makers responsible for a prior bad decision invest more in it than unrelated decision-makers would, and do so in increasing amounts. Each additional investment becomes its own sunk cost, compounding the trap. Recognizing the escalation pattern early — before it becomes a multi-year trap — is substantially easier than stopping later.
How to do it
- Periodically review ongoing projects and commitments with the question: "Am I investing more to justify prior investment?"
- Track successive investment levels: if each round is larger than the last without proportional expected return improvement, that is an escalation signal.
- Name the pattern explicitly to yourself: "I am escalating this commitment."
- Seek outside evaluation at the first escalation signal rather than waiting for crisis.
Evidence
Escalation of commitment is a well-documented organizational and individual phenomenon, particularly when decision-makers are personally responsible for the initial commitment. Staw (1976, 1981) provides the foundational experimental and organizational research. (observational)
Escalation effects are strongest when personal responsibility and social visibility are high; individual private decisions show smaller effects.
Sources
- Staw (1976), knee-deep in the big muddy: a study of escalating commitment, Organizational Behavior and Human Performance
- Staw, B. M. (1976). Knee-deep in the big muddy: A study of escalating commitment to a chosen course of action. Organizational Behavior and Human Performance, 16(1), 27-44.
- Staw, B. M. (1981). The escalation of commitment to a course of action. Academy of Management Review, 6(4), 577-587.
Common mistake
Noticing the escalation pattern only in retrospect — after each successive investment was too small to seem alarming on its own but added up to a large total.
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More practices for The Sunk Cost Fallacy: Escaping Bad Investments
- Zero out past investment before evaluating the forward decision
Explicitly set prior investment to zero and evaluate only what each future path offers from here.
- Apply the new investor test
Ask: would a rational person who had not already invested choose to invest now?
- Set stop-loss policies before starting projects
Define exit criteria at the start, when you are not yet sunk.
- Separate your identity from the investment
The fact that you chose this doesn’t mean continuing is who you are.
- Use regret minimization as a forward-looking check
At 80, which will you regret more — stopping now, or having continued into a deeper hole?
- Calculate the ongoing cost of delay
Every day you continue a bad course is a day you could have started a better one.
Related concepts
- Opportunity Cost Thinking: What You Give Up When You Choose
The hidden price of every choice — and the practices that make it visible
- Expected Value Thinking: Deciding Under Uncertainty
The math of rational choice under uncertainty, its real limits, and how to use it anyway
- Thinking, Fast and Slow, Made Usable
Two systems, the biases they create, and when to slow down
- Loss Aversion, Made Practical
Why losses loom larger than gains — and how to reframe the decision