Latest / Behavioral Economics with Fexingo: Decision Making, Bias, and How People Really Spend / The Endowment Effect Why We Overvalue What We Own
Transcript
- Lucas: So there's a classic experiment that gets cited in almost every behavioral economics lecture. A professor hands out coffee mugs to half the students in a classroom. Then she asks the students who got mugs: 'What's the minimum price you'd sell this mug for?' And she asks the students who didn't get mugs: 'What's the maximum you'd pay to buy one?' Luna: Right, and the gap is always huge. The sellers want like five or six dollars, the buyers will only pay two or three. Lucas: Exactly. That gap is the endowment effect — the simple fact that we value something more once we own it. The mug isn't worth more objectively. It's the same mug. But ownership changes our reference point. Luna: And that experiment was Richard Thaler, right? Back in the early nineties? Lucas: Nineteen ninety, with Kahneman and Knetsch. They ran it at Cornell and then later at the University of British Columbia. And the results have been replicated dozens of times since. The median selling price is consistently about double the median buying price. Luna: It makes me think of when I try to sell something on Craigslist. I always think my old couch is worth way more than anyone is willing to pay. Lucas: That's exactly the endowment effect in the wild. And it's not just couches. It's houses, stocks, even ideas. If you've spent years building a certain strategy at work, you'll overvalue it relative to alternatives. Luna: So is the endowment effect really just loss aversion by another name? Because loss aversion says losses hurt more than equivalent gains feel good. If I own the mug, giving it up feels like a loss. Lucas: That's the standard interpretation. Prospect theory — Kahneman and Tversky's framework — predicts exactly this asymmetry. When you own something, it becomes part of your endowment. Selling it means incurring a loss, so you demand a premium. Luna: But there's a debate about whether it's really loss aversion or just a lack of market experience, right? Some economists argue that if you run the mug experiment with professional traders, the gap shrinks or disappears. Lucas: That's a great point. There's a paper by List in 2003 — John List at the University of Chicago. He ran field experiments at a sports memorabilia show. He found that amateur traders showed a strong endowment effect for baseball cards. But experienced dealers didn't. Luna: So the effect might be about learning to treat assets as fungible. Experienced traders know that a card is just a card — the market price is the market price. Lucas: Exactly. But even among experts, the endowment effect creeps back in when the item is unique or has sentimental value. Your childhood home? You'll overprice it. A vintage watch your grandfather gave you? Almost impossible to sell at a 'fair' price. Luna: That's why the housing market is so full of endowment effect biases. Homeowners have an emotional attachment that buyers don't share. Lucas: And that creates a classic market friction. There's a well-known phenomenon called the 'list-price premium' — homeowners who have lived in a house longer tend to list it at a higher price relative to comparable sales. And those houses sit on the market longer. Luna: Because the seller's reservation price — the minimum they'll accept — is inflated by ownership. Lucas: Right. And that's actually a big deal for understanding market efficiency. If every seller overvalues their own asset, transaction volume drops. Buyers and sellers can't agree on price. That's one reason why housing markets can freeze up after a price decline — sellers refuse to accept the new reality. Luna: So how do you counteract the endowment effect if you're trying to make a rational decision? Lucas: The most effective technique is what Thaler calls the 'ask a friend' approach. Force yourself to take the perspective of a neutral buyer. Ask: 'If I didn't own this, would I buy it at its current price?' If the answer is no, you should probably sell. Luna: That's hard to do emotionally. But I can see how it helps. Especially with investments — people hold losing stocks because selling feels like realizing a loss, even if the stock is a dog. Lucas: That's the disposition effect — a close cousin of the endowment effect. Investors sell winners too early and hold losers too long. They don't want to admit a loss, so they keep the stock until it comes back. But often it never does. Luna: And that's billions of dollars of misallocated capital every year. Lucas: Precisely. So the endowment effect isn't just a lab curiosity. It distorts real markets — housing, collectibles, corporate assets. Think about a company that owns a subsidiary that's underperforming. The managers who built that division will fight to keep it, arguing it's worth more than any buyer will pay. Luna: That's a classic case of the endowment effect in the C-suite. And it leads to value destruction. Lucas: Exactly. One of the lessons from behavioral corporate finance is that divestitures are often delayed because managers overvalue what they've built. A good board or activist investor can help by forcing an objective valuation. Luna: So we're basically wired to be bad at pricing things we own. But we can learn to compensate. Lucas: That's the whole point of behavioral economics — not to eliminate biases, because we can't, but to build structures that help us work around them. Simple rules, checklists, external reference prices. Luna: Like getting a home appraisal before listing. Or using a robo-advisor that rebalances automatically so you don't have to decide which losers to sell. Lucas: Exactly. And one more thing — the endowment effect also explains why free trials are so effective. Once you've used the product for a month, it becomes yours. Canceling feels like a loss, so you're more likely to keep paying. Luna: That's scary. But also brilliant from a marketing perspective. Lucas: It's the same mechanism. Ownership creates attachment. And companies know that. So the next time you're offered a free trial, ask yourself: Am I signing up for the service, or am I signing up for the endowment effect? Luna: That's a good note to end on. Thanks, Lucas. Lucas: Thanks, Luna. See you next time.