The study looked at how social insurance affects private health insurance and individual welfare. Social insurance like Medicaid can reduce the number of people buying private health insurance. This means that the benefits of social insurance may not be as big as we think, and in some cases, it could even be bad for people. This is because social insurance can make people less likely to buy private health insurance, which can offset the benefits of social insurance. This research suggests that when we make changes to social insurance policies, we need to think about how it might affect people's choices about private health insurance.