The increase in the price of sugar created by the tariff will lead domestic consumption to fall by ________ tons per year, compared to when the economy is open without the tariff.  

Technology is a demand shifter.

a. true b. false

The four firm concentration is a measure of

a. the percentage of total output of the four largest firms in an industry b. the total output of the fourth largest firm in an industry c. the percentage of total sales of the four largest firms in an industry d. the total output or sales of the four largest firms in an industry e. either a or c