Endowment Effect
Owning something makes us price it higher than we would pay for it.
Evidence: well established. We label every concept honestly, and say so when it's a teaching model. How we rate evidence.
Shrink Definition
The endowment effect is our tendency to value something more simply because we own it. Once it's ours, we ask a higher price to give it up than we would have paid to get it. Ownership and the pain of losing it inflate its worth in our eyes. What we hold feels more valuable than what we could hold.
Plain language
We value things more once they're ours.
Shrink Insight
Possession itself adds value that's not in the object.
Why it matters
It shapes negotiations, selling, and clutter, and it links to loss aversion. Naming it helps you value things by use, not just by ownership.
Common misunderstanding
People think an item has one fair value regardless of who holds it. Owners consistently value the same item more than buyers do.
Shrink Perspective
What we own feels worth more just because we own it.
Shrink Reflection
What am I holding onto only because it's already mine?
Shrink Step
For something you're keeping, ask what you would actually pay for it today.
Shrink Minute
Notice one possession you overvalue simply because you own it.
Shrink Takeaway
Ownership inflates worth, so price by use instead.
Medical boundary
This concept is educational and shouldn't be used to self-diagnose. It doesn't replace care from a licensed clinician. Symptoms, medication, and treatment decisions should be discussed with a qualified professional, and emergency symptoms require emergency care.
Evidence summary
A robust, heavily replicated finding in behavioral economics, closely tied to loss aversion.
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