In a competitive factor market in which the producer is a price taker,the buyer's demand for an input is given by the marginal revenue product curve. The MRP curve falls because the marginal product of labor falls as hours of work increase.When the producer of the product has monopoly power,the demand for the input is also given by the MRP curve.In this case,however,the MRP curve falls because both the marginal product of labor and marginal revenue fall. In a competitive factor market in which the producer is a price taker, the buyer's demand for an input is given by the marginal revenue product curve. The MRP curve falls because the marginal product of labor falls as hours of work increase. When the producer of the product has monopoly power, the demand for the input is also given by the MRP curve. In this case, however, the MRP curve falls because both the marginal product of labor and marginal revenue fall