Reality is complex; mental models simplify it. A mental model is a tool that helps us make sense of the world and manage complexity and large amounts of information. For example, in public finance, thinking of reserves or rainy-day funds as a government’s savings account is a mental model. This approach simplifies the complex idea of fund balances by comparing it to something familiar from everyday life.

This report will explain how you can use mental models to enhance understanding and decision-making in public finance.