If the MPC = 0.9, the multiplier would be:

When a Pigouvian tax is imposed, ________

A) the marginal private cost curve shifts upward B) the demand curve shifts rightward C) the marginal social cost curve shifts downward D) the marginal social benefit curve shifts downward

The efficient level of recycling equates the

A) marginal cost of scrap disposal to the marginal benefit from not using virgin materials. B) marginal cost of recycling to the marginal benefit from not using virgin materials. C) marginal cost of scrap disposal to the marginal cost of recycling. D) marginal private cost of disposal to the marginal cost of recycling. E) per-unit refund from recycled materials to the marginal benefit from not using virgin materials.