Four stores have a problem with theft and security is a public good.Let S stand for the number of person-hours of security patrols per week.The marginal benefit of security patrols to each of the stores is given by the formula 
Patrols cost $25 per hour.What is the socially efficient level of security (rounded to the nearest whole number) ?
Definitions:
Behavioral Economics
A field that combines insights from psychology and economics to investigate how individuals actually make decisions, challenging the assumption of perfectly rational agents.
Gum
A soft, cohesive substance designed for chewing, made from the sap of certain trees or synthesized materials.
Candy
A sweet tasting confection made from sugar and often combined with fruits, chocolate, or nuts.
Behavioral Economic Theories
A branch of economics that studies how psychological, social, and emotional factors affect economic decisions.
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