What is a requirement for minimizing adverse selection in group insurance techniques?

Minimizing adverse selection in group insurance involves ensuring that the risk pool remains balanced and representative of a broader population, which can be achieved by controlling who is eligible for coverage. When only certain groups are eligible, such as employees of a specific organization, it helps to create a more uniform risk profile among the insured. This uniformity can prevent individuals who are more likely to make claims from disproportionately enrolling, which is a core issue of adverse selection.

When a specific, defined group is chosen, it often leads to better risk-sharing since those within the group typically have similar risk factors. Such criteria can include employment status, industry type, or participation in particular organizations. This creates a more predictable risk pool that allows for more stable premium calculations and less reliance on individual health status during the enrollment process.

In contrast, other choices may lead to higher adverse selection risks. For instance, having no minimum participation can encourage a selection of high-risk individuals to enroll, while the limitation of claims to accidental losses or offering unlimited coverage would not have a direct impact on the balance of risk within the pool itself. Rather, those options may shape the nature of the coverage but do not inherently address the underlying risk profiles of the insured individuals.