In 1990, Kahneman, Knetsch, and Thaler ran a simple experiment. Half the participants received a coffee mug. Markets were then conducted to trade them. Economic theory predicts roughly half the mugs would change hands. Almost none did. The ratio of what sellers demanded to what buyers would pay consistently exceeded two to one — for a mug they had owned for minutes.

If ownership of a mug for minutes produces a 2:1 valuation distortion, the implications for an entrepreneur who has owned a business for years are worth understanding carefully.

Why ownership changes what something is worth

Richard Thaler coined the term endowment effect to describe the finding that owned goods are valued more highly than identical goods not held in the endowment. The mechanism is loss aversion — the same asymmetric weighting of losses and gains that drives the framing effect.

Before you own something, it is a potential gain. You will trade money for it only if it is worth more than the money. The moment you own it, giving it up registers as a loss. And losses are weighted approximately twice as heavily as gains (loss aversion). The reference point has shifted. The same object, evaluated from two different positions of ownership, produces genuinely different felt values — not because the object changed, but because the evaluator’s relationship to it did.

For an entrepreneur considering a pivot, this creates a structural anti-pivot bias that is entirely predictable and entirely independent of whether the current direction is actually better than the alternative. The founder is not evaluating “should I do X or Y?” They are evaluating “should I give up X to gain Y?” X is owned — loss domain. Y is not yet owned — gain domain. The asymmetry is built into the structure of the decision before any analysis begins.

When the business becomes part of the self

Beyond loss aversion, ownership activates a second mechanism that is particularly intense in the entrepreneurial context. Pierce, Kostova, and Dirks’ foundational research on psychological ownership established that once people feel an object is part of their self-concept, divestiture feels like a threat to identity rather than a financial decision.

For most people, this operates mildly with consumer goods. For entrepreneurs, it operates at a different scale entirely. The business is not merely something they possess — it is the primary vehicle through which they have expressed their identity, structured their daily existence, and built their relationships. Pivoting away from the direction they own is not evaluated as a strategic adjustment. It is evaluated as a self-concept threat.

Morewedge and Giblin’s 2015 integrative review in Trends in Cognitive Sciences noted that psychological ownership — not factual legal ownership — is sufficient to trigger the endowment effect. The moment a founder feels the business is theirs, the overvaluation begins. Multiple venture capitalists report that deals they wanted to pursue failed because entrepreneurs held valuations that bore no relationship to what the evidence supported — a direct expression of this mechanism operating at the level of the business as a whole.

The founder who cannot see what their business is worth to anyone who does not own it is not being stubborn. They are experiencing a documented psychological mechanism that intensifies with every year of ownership.

What the entrepreneur-specific research shows

The most directly relevant study is Gonzalez-Jimenez and colleagues’ 2019 experimental research with 466 entrepreneurs in Cali, Colombia — the only large-scale study measuring the endowment effect specifically in an entrepreneur population.

The findings are striking. The endowment effect increased the certainty equivalent of a lottery for the median entrepreneur by 36.5%. Entrepreneurs were more likely to accept riskier bets when those bets were framed in relation to their business than in equivalent non-framed contexts. And practitioners (more experienced entrepreneurs) showed significantly higher levels of the endowment effect than students, not lower.

That last finding is the most counterintuitive and the most important. The conventional expectation is that experience reduces cognitive bias. In this domain, experience intensifies it — because each year of building deepens the psychological ownership that drives the overvaluation. The entrepreneur with five years in their business is more susceptible to the endowment effect on that business than they were in year one.

The risk amplification finding is the most practically dangerous expression of this. A founder whose business is underperforming takes on higher risk to protect it than they would accept in any other context — because the prospect of losing the business triggers loss aversion at a scale that makes very risky bets feel preferable by comparison. The endowment effect is not merely preventing the pivot. It is actively driving escalating risk-taking to avoid confronting the need for one.

If the pattern described here maps onto a situation you are currently in — continuing with a direction that the evidence no longer supports, taking on increasing risk to protect a position that is not working — that is worth taking to a professional rather than managing through insight alone. The escalation dynamic that the endowment effect produces can be difficult to interrupt without external support.

The practical intervention

The most evidence-based tool for counteracting the endowment effect in strategic decisions is the same counterfactual framing from the pivot article: evaluate the current direction as though you do not already own it.

Ask the question a new CEO with no prior investment would ask: given everything I know about this market, this product, and these results, would I start here today? If the answer is no, the gap between that answer and your current reluctance to change direction is the endowment effect in operation.

This does not make the pivot decision emotionally straightforward. But it separates the quality of the decision from the accident of ownership — which is the structural correction the mechanism requires.

A book worth reading alongside this

Thinking in Bets by Annie Duke translates the decision quality versus outcome quality distinction into something immediately practical. Duke’s framework — developed from professional poker — argues that decisions should be evaluated on the reasoning at decision time rather than on the comfort of holding existing positions. For any entrepreneur who finds themselves defending a direction primarily because they have already invested in it, it is the most direct and honest starting point.

This article discusses psychological patterns documented in research on behavioural economics and entrepreneurial decision-making. It is not designed to identify, diagnose, or assess any psychological condition, and it is not a substitute for professional support. The patterns described here are well-documented features of human cognition — recognising yourself in them is not a cause for alarm. If, however, you find that these patterns are significantly affecting your work, relationships, or wellbeing, speaking with a psychologist or therapist can provide personalised guidance that an article cannot.

This article is for educational and informational purposes only. It is not a substitute for professional psychological advice, diagnosis, or treatment. If you are experiencing significant psychological distress, please consult a qualified mental health professional.

Sources: Kahneman, D., Knetsch, J.L. & Thaler, R.H. (1990), Journal of Political Economy, 98(6). Thaler, R.H. (1980), Journal of Economic Behavior and Organization, 1(1). Pierce, Kostova & Dirks (2003), Review of General Psychology, 7(1). Morewedge & Giblin (2015), Trends in Cognitive Sciences, 19(6). Gonzalez-Jimenez, H. et al. (2019), N=466 entrepreneurs.