Negative externalities cause loss of welfare not transmitted by market factors.

A short-run increase in the price of a firm's output will typically

A) lead to a movement along the firm's demand for labor curve. B) lead to more employment in the competitive firm. C) not impact the hiring of labor. D) make the demand for labor more inelastic.

At zero units of output a firm's variable costs are zero.

Answer the following statement true (T) or false (F)