For a common resource, the marginal private cost curve slopes ________ and the marginal social cost curve slopes ________

The aggregate supply curve shifts

A) rightward if potential GDP decreases. B) rightward if the money wage rate falls. C) leftward if the aggregate demand curve shifts leftward. D) rightward if the money wage rate rises. E) leftward if potential GDP increases.

When a man invests in controlling weeds and trash that tend to accumulate in his yard, both he and his neighbors benefit from his action

Is an externality associated with his private decision? If so, explain its effect, and determine whether the efficient level of weed control occurs when the individual invests in weed control.