public investment multipliers

How much benefit (often economic, but also social) does $1 of public spending generate?

when our government spends money in different areas, it usually saves money → for ex funding the police leads to safety which leads to trust and fulfilling lifes which lead to better sleep and less worry which lead to better focus at work which lead to a healthier more productive economy

the concept of marginal return of how much money in the economy is generated per government money invested is a interesting tool.

could be applied to:

police

schools

health system including mental and physical health

one could say the government should spend as much money until the marginal return per dollar spent becomes lower than one

maybe the marginal return per dollar spent is at the beginning high and the decreases with the investment sum increassing