Answer:
The socially optimal number of bank robberies is not equal zero because due to the presence or the possibility of robberies in Banks, some industries will be sustained and such industries are ; Security agencies and their personnel , Insurance companies, Vault designing and manufacturing firms.
Explanation:
A socially optimal quantity of a good or service is the quantity of a good or service that is beneficial to the society ( i.e. to other industries related directly or indirectly to the good or service )
The socially optimal number of bank robberies is not equal zero because due to the presence or the possibility of robberies in Banks, some industries will be sustained and such industries are ; Security agencies and their personnel , Insurance companies, Vault designing and manufacturing firms.
Hence if the socially optimal number of bank robberies equals zero the aforementioned industries will be out of business
