Latest / Behavioral Economics with Fexingo: Decision Making, Bias, and How People Really Spend / Why You Overvalue What You Already Own
Transcript
- Lucas: Let's start with a mug. A plain, dark-blue coffee mug from the university bookstore. In 1990, Daniel Kahneman, Jack Knetsch, and Richard Thaler handed these mugs to half the students in a Cornell classroom. The other half got nothing. Luna: And this is the endowment effect experiment I've heard referenced a hundred times, but I've never actually dug into the numbers. What happened? Lucas: They asked the students who got the mugs: what's the lowest price you'd sell it for? And they asked the students without mugs: what's the highest price you'd pay to buy one? Economic theory says those two numbers should be roughly the same—since the mug is the same mug. But the median selling price was around five dollars and seventy-five cents. The median buying price was around two dollars and twenty-five cents. Luna: So the owners valued the exact same object at more than double what non-owners did. That's a huge gap. Lucas: Huge. And it's not because the owners were irrational or bad at estimating. It's because once you own something, it becomes part of your reference point. Losing it feels like a loss, and losses hurt about twice as much as equivalent gains feel good. That's loss aversion—the engine behind the endowment effect. Luna: So it's not that the mug is special. It's that giving it up feels like a tangible loss. And that feeling inflates the price you demand. Lucas: Exactly. Kahneman and Tversky's prospect theory predicts this. The disutility of losing an object is greater than the utility of gaining it. So owners demand a premium to part with it—a premium that buyers don't feel because they haven't 'lost' anything yet. Luna: But here's what I've always wondered: doesn't the effect depend on how long you've owned it? A mug you just got handed five minutes ago—do you really feel endowment? Lucas: Great question. In the original study, the effect appeared almost instantly. Within minutes of receiving the mug, students priced it far above what they'd pay. But later research suggests the effect strengthens with time. A 2001 study by Strahilevitz and Loewenstein found that the longer you own something, the higher your selling price climbs—because you integrate it into your sense of self. Luna: So a mug you've had for a year becomes part of your identity. That's why people ask absurd prices at garage sales for stuff they've had forever. Lucas: Right. 'I paid two hundred dollars for this lamp in 1998, so I'm asking fifty.' But a buyer sees a dusty lamp worth maybe fifteen. That's the endowment effect in the wild. Luna: And it's not just trivial objects. It affects big decisions too. Housing, for one. Lucas: Housing is a classic domain. Sellers consistently overvalue their homes relative to market prices. A 2003 study by Genesove and Mayer looked at Boston condos during a market downturn. They found that sellers who had bought at the peak—and thus felt a loss relative to their purchase price—listed their units at higher prices and took longer to sell. They were anchored to their reference point, and selling at a loss felt too painful. Luna: So they'd rather wait months than accept a loss that's purely psychological. That's not irrational—it's human. But it does cost them. Lucas: It does. And the endowment effect also shows up in stock investing. People refuse to sell a losing stock because selling would 'realize' the loss. It's the same mechanism: the stock feels like part of your portfolio identity, and selling at a loss feels like a permanent hit. Luna: That's the disposition effect, right? Investors hold losers too long and sell winners too early. Lucas: Exactly. Same root. Now, let me bring in a more recent replication. In 2020, a team led by researchers at the University of Cologne ran a version of the mug experiment—but with vintage vinyl records. They gave participants either a rare Beatles album or a classic Miles Davis LP. Luna: Oh, that's a nice twist. Vinyl has that tactile, nostalgic quality. Did the effect hold? Lucas: It held. Sellers demanded roughly three times what buyers were willing to pay. And the effect was even stronger for participants who said they were 'collectors.' For them, the selling price was about four times the buying price. The more you identify with the category, the stronger the endowment effect. Luna: So if I collect vintage records, I'm even more likely to overvalue what I own. That makes intuitive sense—the object is tied to my self-image as a collector. Lucas: Precisely. And this has implications beyond the lab. Think about salary negotiations. When you're negotiating a raise, you're essentially selling your current salary for a higher one. The current salary becomes your endowment. So you often demand a bigger bump than the employer thinks is fair—because you frame any less as a loss. Luna: And the employer is thinking from a buyer's perspective: what's this person worth to us? They don't feel that loss. So there's a gap. Lucas: Exactly. One practical takeaway: if you're negotiating, try to reframe. Instead of thinking 'I'm losing my current salary,' think 'I'm gaining a new opportunity.' That shifts your reference point. Luna: That's a helpful mental trick. But I want to push back a little. Doesn't the endowment effect sometimes lead to correct valuations? I mean, the seller might have private information about the item's quality—like a car owner knows the engine is well-maintained. Lucas: That's a valid point. In markets with asymmetric information—like used cars—the gap between seller and buyer price partly reflects real differences in knowledge. But in the mug experiment, there was no private information. The mug was identical. So the gap is pure bias. Luna: Fair. So the effect is most dangerous when the object is fungible—like a stock or a commodity—but we treat it as special. Lucas: Right. And that's why the endowment effect is so pervasive. It's not just about mugs. It's about how we frame every transaction. Once you see it, you start noticing it everywhere. Luna: I'll be honest, this episode has made me think about my own biases. If it's been valuable for you too, we should mention what keeps this show ad-free. Lucas: Yeah, listener support. If walking through these ideas with us has made something click, and if today felt worth the price of a coffee to you, that's literally the link: buy me a coffee dot com slash fexingo. No pressure, just a way to keep this going. Luna: It's a small gesture, but it really does help us stay independent. And we appreciate every single person who's chipped in. Lucas: Okay, back to the endowment effect. One more domain I want to touch on: marketing. Companies use this bias deliberately. Ever seen a 'free trial' that converts to a paid subscription? Luna: Oh, of course. Once you've used the product for a month, it's yours. You feel a sense of ownership. Canceling feels like a loss. Lucas: Exactly. That's the endowment effect in action. The trial creates psychological ownership. And the longer the trial, the stronger the effect. That's why free trials that automatically convert to paid plans are so effective—and controversial. Luna: So as a consumer, how do I protect myself? Besides just being aware of it. Lucas: Awareness helps. But there's a specific technique: ask yourself, 'If I didn't own this, would I buy it today?' That reframes the decision from a loss frame to a gain frame. It's the same question Thaler recommends in his book 'Nudge.' Luna: That's a great mental hack. 'Would I buy it now?' takes the endowment out of the equation. Lucas: It does. And for sellers, the opposite applies. If you want to sell something, you can reduce the buyer's endowment effect by letting them 'try before they buy.' Test drives, sample sizes, trial memberships—all of that creates a temporary endowment in the buyer, making them value the product more. Luna: So the same bias that hurts sellers in a housing market can help them in a car dealership. The framing is everything. Lucas: Exactly. The endowment effect isn't good or bad. It's a feature of how our brains process ownership. The question is whether you're aware of it—and whether you can use it or counteract it. Luna: Alright, I'm going to test this on myself. I have a stack of old books I've been meaning to sell. I'll ask myself if I'd buy them today. If the answer is no, out they go. Lucas: That's the spirit. And if you find yourself clinging to something—a stock, a mug, a salary—ask the same question. It's a simple check, but it can save you from a lot of overvaluation. Luna: Thanks, Lucas. I think this one will stick. Lucas: Thanks, Luna. And thanks to everyone listening. Next time on Behavioral Economics with Fexingo: why your brain treats a free gift as more valuable than a discount—even when the discount is worth more.