A fall in the real interest rate, all other things held constant, will cause a country's ________ to ________

Scarcity is a situation in which resources are unlimited in quantity and can be used in different ways

Indicate whether the statement is true or false

Which types of models are built with assumptions?

a. economic models, but not models in other disciplines such as physics and biology b. economic models as well as models in other disciplines such as physics and biology c. models that are built for teaching purposes but not for research purposes d. bad models