Mercosur is a trade agreement between nations

In the long run, profits in a monopolistic competition market are zero because:

a. of government regulations. b. of collusion. c. firms are free to enter and exit the market. d. firms produce a differentiated product.

An increase in autonomous investment in an economy will _____

a. shift the aggregate expenditure line upward b. shift the aggregate expenditure line downward c. result in an upward movement along the aggregate expenditure line d. result in a downward movement along the aggregate expenditure line e. increase aggregate expenditures only at high levels of income