In most consumer markets, the buyer can evaluate product quality before or shortly after purchase. Why does healthcare violate this assumption, and what market failure does this create?
AHealthcare products are too expensive for consumers to evaluate
BHealthcare is a 'credence good' — patients often cannot evaluate quality even after receiving treatment, creating information asymmetry that prevents effective consumer choice from disciplining the market
CHealthcare quality is perfectly measurable through patient satisfaction surveys
DPatients can always evaluate quality by comparing prices across providers
A credence good is one whose quality the consumer cannot assess even after consumption — you may feel better after surgery, but you cannot know whether a different surgeon would have achieved a better outcome or whether the surgery was necessary at all. This information asymmetry means patients cannot 'shop' effectively, price competition is limited, and the market cannot rely on informed consumer choice to allocate resources efficiently. This is why licensure, professional standards, and quality reporting exist as non-market mechanisms to protect patients.
Question 2 Short Answer
Arrow argued that the fundamental uncertainty of illness — you do not know if, when, or how seriously you will be sick — is a primary reason healthcare markets fail. How does this uncertainty create demand for insurance, and why is insurance itself a source of further market failures?
Think about your answer, then reveal below.
Model answer: Illness uncertainty makes risk-averse individuals willing to pay a premium to transfer financial risk to an insurer. But insurance creates its own market failures: moral hazard (insured patients consume more care because they do not bear the full cost) and adverse selection (sicker people are more likely to buy insurance, driving up premiums and potentially unraveling the market). These secondary failures — which arise from the insurance solution to the primary uncertainty — are why healthcare markets require additional interventions like mandates, subsidies, and regulation.
Arrow's insight was that healthcare's problems are not incidental but structural. The uncertainty that makes insurance necessary also makes insurance markets imperfect, which in turn justifies government intervention to make insurance markets work (mandates to prevent adverse selection, cost-sharing to control moral hazard). Each layer of market failure begets a response that introduces its own complications.
Question 3 True / False
Vaccination produces positive externalities — vaccinated individuals reduce disease transmission to others. In an unregulated market, vaccination rates would therefore be inefficiently low.
TTrue
FFalse
Answer: True
Externalities create a wedge between private and social value. An individual deciding whether to get vaccinated considers only their personal benefit (reduced risk of illness) and cost. They do not account for the benefit to others (reduced transmission, herd immunity). Since the social benefit exceeds the private benefit, the market equilibrium produces less vaccination than the socially optimal level. This justifies public subsidies, mandates, or free provision — standard economic solutions to positive externalities applied to a health context.