In order to sell an additional unit of its product, a monopolist must decrease price on all units

The federal funds rate is determined by demand and supply of bank reserves.

a. true b. false

In what ways can economists help auto manufacturers estimate the marginal rate of substitution between features such as vehicle interior size and acceleration?

A) Examining production cost data B) Conducting consumer surveys about willingness to pay for auto features C) Solving the standard consumer model D) Statistically analyzing historical data on purchases of different types of autos E) B and D only