What are the two critical measures of a nation's economic health?

For a regulated natural monopoly, the marginal cost pricing rule is a rule that sets price ________ marginal cost and achieves an ________ amount of output

A) equal to; efficient B) above; inefficient C) below; efficient D) equal to; inefficient E) above; efficient

An endogenous variable is typically ________

A) taken as given B) strictly explained outside the model C) strictly explained inside the model D) strictly explained by data E) strictly explained by graphical analysis