A tariff is a tax on

The third round of quantitative easing, announced in September 2012, was focused on purchases of:

A) short-term Treasury bills B) long-term Treasury notes C) long-term Treasury notes and sales of short-term Treasury bills D) mortgage-backed securities

Assuming that (1) labor supply is perfectly inelastic (vertical), and (2) immigrants and skilled labor are complements, an increase in unskilled immigrant labor ___________ the real wages of unskilled labor and __________the real wages of skilled labor

a. increases; increases b. increases; decreases c. decreases; increases d. decreases; decreases