Latest / Behavioral Economics with Fexingo: Decision Making, Bias, and How People Really Spend / Why Your Brain Treats a Rebate as a Windfall
Transcript
- Lucas: So in 2009, the U.S. government launched the Car Allowance Rebate System — better known as Cash for Clunkers. It was a three-billion-dollar program offering up to four thousand five hundred dollars if you traded in an old gas-guzzler for a more fuel-efficient car. Luna: I remember that. People lining up at dealerships, smashing their old cars on YouTube. Lucas: Exactly. Six hundred and ninety thousand cars were traded in. But here's the behavioral economics angle: follow-up surveys found that about forty percent of participants said they bought a more expensive car than they originally planned. Luna: Because the rebate felt like free money? Lucas: That's the hypothesis. The rebate was framed as a bonus from the government, not a price cut from the dealer. So people mentally deposited it into a 'windfall' account — separate from their regular checking account. And money in the windfall account gets spent much more freely. Luna: Richard Thaler's mental accounting framework. You treat a dollar from your paycheck differently than a dollar you found on the street. Lucas: Right. And the Cash for Clunkers rebate felt like found money. The economist who studied this later — I think it was a working paper out of the University of Michigan — found that participants spent about twenty-five percent of the rebate on the car itself. But they also increased spending on accessories, extended warranties, things they wouldn't have bought otherwise. Luna: So the rebate didn't just lower the price. It changed their willingness to spend overall. Lucas: Exactly. And this is different from a straight discount. If the dealer had knocked four thousand dollars off the sticker price, the buyer would have mentally subtracted that from the car's cost. But a rebate from the government — especially one mailed as a check later — feels like a separate windfall. Luna: I wonder if the framing matters. 'You get $4,500 back' versus 'you save $4,500.' Lucas: Huge difference. 'Get back' implies it's your money, but 'rebate' sounds like they're giving you extra. There's a 2020 study by Gneezy and List — they ran a field experiment with a rebate on a solar panel installation. They found that framing the rebate as a 'bonus' increased uptake by fourteen percent compared to framing it as a 'discount.' Luna: So the word 'bonus' triggers the windfall account. Lucas: That seems to be the mechanism. And it's not just government programs. Retailers use this all the time. Think about the 'get a $50 gift card when you spend $200' offer. That gift card is a rebate. And when you use it later, you spend it differently than if you'd just paid cash. Luna: There's a classic study — I think it's from Prelec and Simester at MIT — where they auctioned off tickets to a basketball game. Half the winners paid cash, half paid with a credit card. The credit card bidders spent twice as much. Lucas: And that's a different mechanism — payment decoupling — but it's related. The further removed the payment feels from the consumption, the more you spend. A rebate check that arrives weeks later is about as decoupled as you can get. Luna: Let's bring in the stimulus checks from 2020. The IRS sent out one thousand two hundred dollars per adult. And there was a lot of debate about whether people would spend or save it. Lucas: Right. The Bureau of Labor Statistics did a survey — the Household Pulse Survey — and found that about thirty-six percent of recipients spent most of the first check within two weeks. And what did they spend it on? Not just essentials. A lot went to electronics, home goods, and dining out. Luna: So again, windfall behavior. Even though it was technically a tax rebate — an advance on a credit — people treated it as found money. Lucas: Yes. And there's an interesting nuance. Higher-income households saved more of it. Lower-income households spent it more quickly on necessities. But across the board, the 'rebate' label led to higher spending velocity than if the same money had been delivered as a withholding reduction. Luna: Because a withholding reduction is invisible. You never see the lump sum. Lucas: Exactly. And that's one reason policymakers prefer rebates — they produce a visible, psychologically salient event. But the downside is that people don't always use it as the policy intended. Cash for Clunkers was supposed to get older, less efficient cars off the road. And it did. But it also led people to buy bigger, pricier cars than they needed. Luna: There's actually a 2011 study from the National Bureau of Economic Research that looked at the environmental impact. They found that about a third of the fuel savings from Cash for Clunkers was offset because people bought less efficient replacement vehicles than they would have without the rebate. Lucas: Because they used the windfall to 'upgrade' to a bigger vehicle. So the very psychological effect that made the program popular also undermined part of its environmental goal. Luna: And the same thing happens with tax rebates for energy-efficient appliances. People buy a more expensive model than they would have, and some of the energy savings get eaten up by the larger size. Lucas: That's a really important point. The rebate acts as a license to spend more. The behavioral economist calls it the 'rebate windfall effect.' And it's distinct from the classic 'sunk cost' or 'loss aversion' biases we've talked about before. Luna: So if I'm a marketer, how do I use this without tricking people? Lucas: I think transparency helps. If you frame a rebate as a 'bonus' or 'cash back,' you're being honest about the psychology. The key is to know that the rebate will feel separate. So design your offer accordingly. If you want someone to buy a more expensive product, the rebate is a great tool. If you want them to save money, maybe a discount is better. Luna: Or a rebate on a smaller, simpler product. Don't let them upgrade out of the sustainability goal. Lucas: Exactly. And that's what some states have done with their electric vehicle rebates. They cap the MSRP of eligible vehicles to prevent the windfall effect from encouraging luxury purchases. Luna: So the rebate windfall effect is real, it's measurable, and it's something both policymakers and consumers should be aware of. Lucas: Speaking of awareness — real quick, and then we'll close. Keeping this show ad-free and research-driven matters to us. A small group of listeners already chips in monthly through buy me a coffee dot com slash fexingo, and that's literally what funds making this many episodes. Luna: Yeah. If you've gotten value from understanding your own spending biases, that's the kind of support that keeps us going. Lucas: Okay, back to the psychology. So what's the takeaway for an everyday consumer? Next time you get a rebate check or a tax refund, pause. Ask yourself: is this really found money? Or is it just your own money coming back to you? Luna: And maybe wait 24 hours before spending it. Let the windfall feeling cool down. Lucas: That's a great rule. Because the rebate windfall effect is powerful, but awareness is the first step to countering it. Thanks for listening.