Suppose economists estimate the following cost and benefit functions associated with 1990 CAAA (Clean Air Act Amendments) in the US.
TSB=80A-0.4A2 MSB=80-0.8A
TSC=20A+0.85A2 MSC=20+1.7A
Where A represents the percent of pollution abatement, and costs and benefits are measured in millions of dollars.
(a) Find the TSB and TSC associated with an abatement standard of 30. Based solely on the relative values of TSB and TSV, can you state definitively whether this abatement level is efficient? Explain.