The article explores how people's optimism affects how much information they share in communication. The researchers used a model to show that when someone is more optimistic, they tend to share more information, leading to better outcomes. They found that if someone chooses an optimistic person to make decisions, they benefit more than if they choose a pessimistic person. Additionally, optimistic people are more likely to benefit from centralizing decision-making. In a two-way communication game, a person can't effectively share their private information unless it's useful enough.