Explain risk pooling and how adverse selection can destabilize health insurance markets.

Prepare for the Business of Healthcare and Health Policy Test. Study with multiple choice questions and explanations to ace your exam!

Risk pooling means spreading the cost of medical care across a large group of people so that no individual bears the risk alone. When many healthy and sick people participate in the same pool, the costs of uncommon high‑spending patients are shared by everyone, which keeps average premiums lower and more predictable.

Adverse selection happens when individuals have better information about their own health than insurers, and prices don’t fully reflect that risk. High‑risk (sicker) individuals have a greater expected medical need and are more inclined to enroll in coverage, while healthier individuals may opt out if premiums seem high relative to their expected costs. This skews the pool toward higher costs, raising the average cost per member and pushing premiums up.

As premiums rise, healthier people are more likely to drop out or avoid buying insurance, which leaves an even sicker pool and even higher costs. This creates a destabilizing cycle often called a “death spiral,” which can make coverage unaffordable or unsustainable. Policies like mandates or subsidies help keep participation broad and affordable, mitigating adverse selection and stabilizing the market.