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 MB = 200 - 2S. Patrols cost $20 per hour. If each store provided security independently, how much would each store provide?

A. 90 person-hours of patrols per week

B. 100 person-hours of patrols per week

C. 92.5 person-hours of patrols per week

D. 97.5 person-hours of patrols per week


A. 90 person-hours of patrols per week

Economics

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