The International Labor Organization has been around since 1919, and has a consistent record of being willing to take action against countries that violate core labor standards

The evolution of the payments system from barter to precious metals, then to fiat money, then to checks can best be understood as a consequence of

A) government regulations designed to improve the efficiency of the payments system. B) government regulations designed to promote the safety of the payments system. C) innovations that reduced the costs of exchanging goods and services. D) competition among firms to make it easier for customers to purchase their products.

Supply-side economists believe that changes in government purchases affect

a. only aggregate demand. b. only aggregate supply. c. both aggregate demand and aggregate supply. d. neither aggregate demand nor aggregate supply.