In this guide
In 1963, the economist Kenneth Arrow (later a Nobel laureate) explained why medical care doesn't behave like other goods: illness is unpredictable, patients know much less than doctors, trust replaces normal price competition, and insurance changes how people use care. Those problems explain much of why US health prices are hidden and hard to compare. They also explain why medical travel works best for routine, standardized services like checkups and dental work, where Arrow's problems are weakest.
Arrow's four problems
The paper is "Uncertainty and the Welfare Economics of Medical Care," American Economic Review, volume 53, number 5 (December 1963), pages 941–973.
1. You can't plan it
Most goods you can buy when you choose. Illness arrives unpredictably, often urgently, so you can't shop calmly in advance.
2. You can't judge it
Patients usually know far less than doctors about what they need and whether a treatment worked. You can judge a new phone after a week; it's much harder to judge a diagnosis.
3. You have to trust
Because patients can't judge quality, professional ethics, licensing and reputation take the place of normal price competition. Doctors are expected to act in your interest, not just sell to you.
4. Insurance changes behavior
Insurance protects people from huge, unpredictable costs, but when someone else pays, prices stop guiding choices. Insurers then add rules, networks and approvals to control costs.
What this means for US prices
Put these together and you get prices that are negotiated privately, hidden from patients, and hard to compare. That's why price transparency rules, Good Faith Estimates and surprise-billing protections exist. (See our guides on hospital price files and why scans cost less abroad.)
Where markets do work
Arrow's problems are weakest when care is:
- Planned, not urgent
- Standardized, so it's easier to compare like with like
- Paid in cash, so prices matter to the buyer
- Lower risk, so a mistake is less catastrophic
That describes checkups, routine imaging and much dental work, which is exactly where medical travel has grown. It doesn't describe emergency care, cancer treatment or complex surgery, where trust and continuity matter most.
The lesson for patients
- For standard services, compare prices, including across borders, with the full trip cost.
- For complex or uncertain care, put trust, follow-up and continuity ahead of price.
- Either way, keep your own doctor in the loop.
Sources
- Kenneth J. Arrow, "Uncertainty and the Welfare Economics of Medical Care," American Economic Review 53(5): 941–973, December 1963
- William Savedoff: “Kenneth Arrow and the birth of health economics,” Bulletin of the World Health Organization, 2004 scielosp.org
Please note. General information, not medical advice.
Reviewed at least every three monthsNo paid placementsInformation, not medical adviceOur editorial standards
Joe Yang, PhD, Economics. Joe Yang holds a PhD in economics from the University of Washington. For four years Joe evaluated the costs and savings of US health programs for insurers and employers at a health-analytics company, and before that studied pricing and demand as an economist at Amazon and a data scientist at Oracle. These guides apply the same discipline to a simpler question: what care really costs, and where.
