The Thick Market Trap: Why Dating Apps Make Commitment Impossible

When Paul Oyer, a Stanford labor economist, decided to write about online dating, he reached for a concept his colleagues would recognize immediately: thick markets. A thick market is one with many buyers and many sellers — think the New York Stock Exchange, or a city with hundreds of restaurants competing for diners. Thick markets are efficient. They reduce search costs, improve matching, and in theory, make everyone better off. Oyer’s book, Everything I Ever Needed to Know About Economics I Learned from Online Dating, maps this logic onto Tinder, Hinge, and Bumble. With millions of users swiping daily, the dating market has never been thicker. That should mean better matches, faster connections, and happier outcomes. The data tells a different story. The global dating app market surpassed $12.5 billion in 2026, with roughly 350 million active users — and yet surveys consistently show rising rates of loneliness, burnout, and frustration with the very platforms that promised to solve the search problem. Something in the thick-market analogy is breaking down. The dark corollary Oyer didn’t fully explore is that thickness doesn’t just reduce search costs — it also changes what people are worth to each other. In a thin market, you meet someone at a friend’s dinner party. There are maybe three single people in the room. You talk. You invest attention because the next opportunity isn’t arriving in sixty seconds. The scarcity of options raises the value of each potential match, not through sentimentality, but through a straightforward economic mechanism: the cost of walking away is high, so you’re more likely to work through friction rather than discard the connection. Now move to a thick market. The app serves up dozens of profiles in a single session. The next match is always one swipe away. The cost of walking away collapses toward zero. And when exit is nearly free, the threshold for staying — what economists call the reservation value — drifts upward. You hold out for a match that clears a bar you can’t quite articulate, because the market keeps whispering that something better is one more swipe away. That’s the paralysis mechanism. But there’s a second, more corrosive effect at work: adverse selection. Adverse selection is the classic problem where asymmetric information drives the highest-quality participants out of a market. George Akerlof won a Nobel Prize for modeling it in the market for used cars: sellers know whether their car is a lemon, buyers don’t, so buyers discount every offer, which pushes honest sellers out, leaving mostly lemons. The market selects against quality. In the dating-app ecosystem, the people most ready for commitment — emotionally available, clear about what they want, willing to invest — are the ones who find the thick-market dynamic most punishing. They signal genuine interest and receive ambiguity in return. They propose a real date and get ghosted. Each interaction teaches them that the market doesn’t reward what they’re offering. Over time, many of them exit. Not dramatically — they just delete the app one Sunday and don’t reinstall it. Who stays? The people best adapted to low-commitment, high-volume interaction. The ones comfortable keeping three conversations in orbit, never quite closing any of them. The market hasn’t made them this way; it’s simply selected for them. The structure itself filters for ambiguity. This isn’t a moral claim about anyone’s character. It’s a prediction that falls out of the model: when information about intentions is asymmetric and exit is cheap, the equilibrium tilts toward the participants who treat intimacy as a short-term contract. Situationships aren’t a failure of willpower. They’re the rational adaptation to a system where the economic and emotional costs of commitment are high and the returns are uncertain. The New York Times reported in 2025 on what it called “deferred relationships,” linking gig-work precarity and geographic mobility directly to commitment hesitancy. One participant put it plainly: you might be moving cities every couple of years — no wonder you’re hesitant. The labor market and the dating market aren’t separate spheres. They reinforce the same logic: keep your options open, don’t lock in, stay liquid. Moira Weigel’s Labor of Love traces a longer history here, showing how dating has always been entangled with commerce. But the current moment is distinctive. The language of intimacy has been fully colonized by market logic — we “invest” in partners, “optimize” profiles, “signal” value — not because we’re cynical, but because the infrastructure we’re using was built to treat people like listings. None of this means the apps are useless or that the solution is to delete them and hope for a meet-cute at the grocery store. The point is more useful than that. If the market itself is a structure that selects against commitment, then your difficulty finding commitment isn’t evidence that you’re failing at the game. It’s evidence that you’re playing a game whose rules were never designed to produce the outcome you want. That reframing doesn’t solve the problem, but it does something almost as valuable: it stops you from blaming yourself for a structural outcome.