The marginal cost of hiring the 4th worker is

For this question, assume that investment spending depends only on output and no longer depends on the interest rate. Given this information, an increase in the money supply

A) will cause investment to decrease. B) will cause investment to increase. C) will cause a reduction in the interest rate. D) will have no effect on output or the interest rate. E) will cause an increase in output and have no effect on the interest rate.

Which of the following are not reasons for the low productivity in developing countries?

a. Few natural resources b. Developed capital infrastructure c. Poor financial system d. Inefficient use of labor