If a country had a trade surplus of $50 billion and then its exports rose by $30 billion and its imports rose by $20 billion, its net exports would now be

The federal funds rate is a:

A) short-term nominal interest rate. B) short-term real interest rate. C) long-term real interest rate. D) long-term nominal interest rate.

A firm should make an investment if the expected return is greater than

A) the marginal cost of the investment. B) the fixed cost of the investment. C) the opportunity cost of the investment. D) the expected rate of inflation.