Some pet owners are using an "invisible fence" to keep their animals from straying. Every time the animal steps over the edge of the property, it gets a mild shock. A social scientist would call the shock

A rising dollar makes U.S. goods

A) more expensive abroad and increases the volume of U.S. exports. B) less expensive abroad and increases the volume of U.S. exports. C) less expensive abroad and decreases the volume of U.S. exports. D) more expensive abroad and decreases the volume of U.S. exports.

The additional revenue a firm obtains when it hires an additional worker (holding other inputs constant) is the

A) marginal revenue product (MRP) of labor. B) total factor cost (TFC) per worker. C) general rule for hiring. D) marginal physical product (MPP) of labor.