So, following a discussion I had today, I have the following question.
If we use the return on investment (ROI) to describe the gain of an investment is there a similar concept not for a company but the state as whole.
The idea is the following: if a state 'invests' (is this the correct word in the sense of a state?!) in infrastructure, education, healthcare, there is a 'return' on the spent money. For example, return on infrastructure would be companies using faster internet or streets to be more efficient, making more money, in the last run paying more taxes, money spent for education would give educated people earning more money, paying more taxes; and finally, healthcare would lead to more people paying longer taxes. I think you get the idea.
Unfortunately I am no economist and do not really know where or how to look, whether such a concept exists.
Thank you and appreciate your answers.