The economics of being trapped
Airport restaurants aren’t expensive by accident. They’re expensive by design. Economists call this captive-audience pricing: when consumers have limited alternatives, high search costs, and time constraints, sellers can charge premium prices without losing customers. You’re not paying for better food. You’re paying for the inability to leave.
Avinash Dixit and Joseph Stiglitz’s landmark work on monopolistic competition explains the mechanism. When a seller faces captive demand— customers who cannot easily switch to alternatives—the profit-maximizing strategy is to charge higher prices. Airport concessionaires know you can’t leave the terminal, can’t comparison shop, and need to eat before your flight. Every element of the situation favors the seller.
Research on airport pricing by Oum, Zhang, and Zhang found that airports with dominant carriers (limited competition) charged significantly higher concession prices. The captive-audience effect compounds: fewer airlines means fewer passenger choices, which means restaurants face even less competitive pressure. Hub airports are particularly expensive because connecting passengers are literally trapped between flights.
Hotel restaurants operate on similar economics. After a long travel day, guests face high “search costs” to find external options: they’d need to research alternatives, travel to them, and navigate an unfamiliar area. Late at night, when local restaurants are closed, the hotel restaurant becomes the only option. The markup premium follows.
Sources: Dixit & Stiglitz, “Monopolistic Competition and Optimum Product Diversity,” American Economic Review (1977); Oum, Zhang & Zhang, “Airport pricing,” Journal of Urban Economics (2004).
What captive pricing looks like on a menu
The same burger at three different venues tells the story. Airport and hotel restaurants exploit their monopoly position differently—airports through explicit markups, hotels through “convenience” premiums—but the effect on your wallet is the same.
Notice the asymmetry: the highest markups aren’t on the cheap items. Hotels and airports charge the steepest premiums on premium items—steaks, seafood, wine—because those are the items business travelers on expense accounts order. The person paying out of pocket for a salad subsidizes the infrastructure that serves $58 steaks to someone else’s corporate card.
This pricing strategy is deliberate. The menu offers low-cost options (they need to serve everyone) but margins are concentrated in the high-end items that expense-account travelers select. When you split evenly, you redistribute money from low-margin orders to high-margin orders.
When personal money meets corporate cards
The airport and hotel restaurant create a unique collision: people with fundamentally different relationships to money sitting at the same table, ordering from the same overpriced menu, facing the same check.
Richard Thaler’s research on mental accounting reveals why this matters. People don’t treat money as fungible. A dollar from an expense account feels different from a dollar from your savings. The business traveler on full per-diem isn’t spending “their” money at all— it’s already allocated corporate funds that they’ll lose if they don’t spend it. The personal traveler visiting family is spending post-tax income with real opportunity cost.
Company reimburses all reasonable travel meals. No personal cost. Unused per-diem doesn’t carry over.
Orders freely. Steak, drinks, dessert. “Why not?”Company covers meals up to $40/day. Anything over comes from personal funds.
Orders carefully. Watches the total. Skips the cocktail.Work travel extended for personal time. Today’s meals aren’t expensable.
Orders modestly. Already paying inflated hotel rates.No expense account. Every dollar is real money from their own budget.
Orders the cheapest viable option. Dreads the bill.Put these four people at the same airport table and suggest equal splitting. The person on full corporate coverage has zero incentive to object—in fact, equal splitting saves them money compared to itemized splitting. The personal traveler pays the same $45 equal share but ordered a $18 salad. They’re subsidizing the expense account.
“Mental accounting is a set of cognitive operations used to organize, evaluate, and keep track of financial activities. The most important feature is that money is not fungible.”
Richard Thaler, Nobel Laureate in Economics
Thaler’s insight explains why the personal traveler feels worse about overpaying at an airport than they would overpaying the same amount at a regular restaurant. They’re already categorizing this spending as “travel premium” in their mental ledger—being forced to subsidize someone else’s expense account adds insult to that injury.
Source: Thaler, “Mental Accounting Matters,” Journal of Behavioral Decision Making (1999).
The travel depletion factor
Airport and hotel dining happens when people are at their cognitive worst. After security lines, flight delays, time zone shifts, and unfamiliar environments, travelers face a phenomenon psychologists call ego depletion: the temporary reduction in willpower and decision-making capacity that follows extended self-control demands.
Roy Baumeister’s research demonstrated that willpower functions like a muscle that fatigues with use. Navigating an airport—making decisions about gates, timing, luggage, security procedures—depletes the same cognitive resource you’d use to advocate for fair bill splitting. By dinner time, many travelers simply don’t have the mental energy to calculate their share or suggest itemized splitting.
The path of least resistance: When the check arrives at the end of a long travel day, “let’s just split it evenly” isn’t a fair proposal—it’s a depleted proposal. The person suggesting it may not be trying to exploit anyone; they’re simply too tired to do the math. The result is unfair regardless of intent.
Hotel restaurant dinners present the same dynamic. After a full day of meetings, the business traveler suggesting dinner in the lobby restaurant is choosing convenience over value. When the group agrees to “just split it,” they’re making a decision in a depleted state that they might regret when reviewing credit card statements later.
Ernst Fehr and Klaus Schmidt’s research on fairness preferences shows that people have strong innate preferences for equitable outcomes— but these preferences require cognitive resources to implement. A depleted traveler might recognize that equal splitting is unfair but lack the energy to object. The inequity persists not because everyone accepts it, but because no one has the bandwidth to address it.
Sources: Baumeister et al., “Ego Depletion,” Journal of Personality and Social Psychology (1998); Fehr & Schmidt, “A Theory of Fairness,” Quarterly Journal of Economics (1999).
A real scenario: the layover dinner
Four colleagues have a 3-hour layover at Chicago O’Hare. One is on full expense account, one has a $50/day meal cap, one is extending the trip for personal travel (not expensable), and one is a freelancer who joined the trip out of pocket. They sit down at a terminal restaurant.
Under equal splitting, the freelancer pays $56.99 for $16 of food— a 256% markup on top of already-inflated airport prices. They’re paying $36 extra to subsidize the VP’s steak, which the VP would have expensed anyway. That $36 represents real post-tax money from someone who chose to eat the cheapest item on the menu.
Meanwhile, the VP’s expense report shows $56.99 instead of $108.15—they actually underspent their reimbursement. The company is happy. The VP is happy. The freelancer is subsidizing both of them.
Why this hurts more than regular overpayment
Drazen Prelec and George Loewenstein’s research on the pain of paying reveals why overpaying at an airport feels particularly acute. The pain isn’t just proportional to the amount—it’s proportional to how much the payment feels like a loss relative to what you received.
At an airport, you’re already paying inflated prices. The $16 salad is a $10 salad anywhere else. Your brain has already processed that premium as a loss. When you then pay $57 for that $16 salad through equal splitting, you’re experiencing a second loss on top of the first. The pain compounds.
“The pain of paying is not merely the recognition that money has been spent; it is the experienced aversiveness of parting with money.”
Prelec & Loewenstein, MIT and Carnegie Mellon
J. Stacy Adams’ equity theory adds another dimension. People evaluate fairness by comparing their input/outcome ratios to others’. At the airport table, the freelancer’s ratio is dramatically worse: high input (their entire meal cost), low outcome (a small salad). The VP’s ratio is excellent: moderate input (less than their meal cost), high outcome (steak and wine). This inequity is psychologically painful independent of the dollar amount.
The Global Business Travel Association reported that business travel spending reached $1.48 trillion globally in 2024, with meals representing a significant portion. That spending is distributed through millions of mixed-context dining situations like the one above. The aggregate wealth transfer from personal travelers to expense-account travelers through equal splitting is substantial.
Sources: Prelec & Loewenstein, “The Pain of Paying,” (1998); Adams, “Toward an Understanding of Inequity,” Journal of Abnormal and Social Psychology (1963); GBTA “2024 Business Travel Index Outlook.”
Three approaches that work
Airport and hotel restaurants don’t have to end with unfair splits. The key is recognizing that equal splitting fails specifically when expense contexts vary and price variance is high—both conditions present in captive-pricing environments.
Name the context upfront
Before ordering: “Some of us are on expense accounts, some aren’t— should we plan to split by what we order?” Acknowledges the reality without forcing anyone to disclose their specific situation.
Itemized split when the check comes
One person scans the receipt, assigns items, sends totals. Each person pays for what they ordered plus proportional tax/tip. Takes 30 seconds with an app.
Expense account pays all
If one person has a generous expense policy, they can offer to cover everyone: “I’ve got this one—it’s on the company.” But only say this if you’re certain your policy allows it.
The middle option—itemized splitting—is optimal for airport and hotel contexts because it requires no one to disclose their expense status or budget constraints. The person who ordered the salad pays salad prices. The person who ordered steak pays steak prices. The expense-account traveler submits their actual share for reimbursement. Everyone’s mental accounting stays coherent.
At regular restaurants with lower price variance and similar expense contexts, equal splitting can be fine. But at captive-pricing venues where the spread is 4x and expense contexts vary wildly, itemized splitting isn’t nitpicking—it’s the only mathematically fair approach.
How research shaped the design
The unique challenges of airport and hotel dining—captive pricing, expense collisions, travel depletion, extreme price variance—map directly to specific design choices in splitty.
