Accept positive-EV decisions even when they feel uncomfortable

If the expected value is clearly positive, take the decision — even if most individual outcomes are losses.

Why it works

Loss aversion causes people to reject positive-expected-value gambles because the pain of a likely small loss outweighs the pleasure of a less likely large gain — even when the math clearly favors the bet. The discipline of accepting positive-EV decisions consistently is what produces good outcomes in aggregate over a lifetime of decisions. Individual outcomes are noise; repeated positive-EV plays are the signal.

How to do it

1. Identify decisions you routinely avoid because individual outcomes feel bad, even when the aggregate is positive.
2. Calculate or estimate whether the EV is genuinely positive.
3. Commit to a policy — "I will always take this class of positive-EV decision" — rather than deciding case by case under the influence of loss aversion each time.
4. Track the aggregate results over months to build the empirical confidence that positive-EV discipline pays off.

Evidence

Loss aversion is a well-replicated finding in behavioral economics: people weight losses approximately twice as heavily as equivalent gains, causing systematic rejection of positive-EV propositions. The corrective of policy-level decision-making is established in decision theory. (rct)

Loss aversion has become somewhat contested regarding its universality and magnitude; the core finding is robust, but 2x is an average that varies substantially by individual and context.

Sources

• Tversky & Kahneman (1991), loss aversion in riskless choice, Quarterly Journal of Economics

Common mistake

Treating loss aversion as wisdom ("I’m being careful") rather than recognizing it as a systematic bias that costs real value over a large number of decisions.