Final answer:
A shortage in TRICARE, also known as excess demand, occurs when the quantity demanded for medical services exceeds the quantity supplied. This happens when the actual price for the services is below their equilibrium price.
Step-by-step explanation:
A shortage in TRICARE refers to a situation where the quantity demanded for medical services exceeds the quantity supplied. It is also known as excess demand. In other words, there is not enough availability of medical services to meet the demand. This shortage can occur when the actual price for the services is below their equilibrium price.