Workers, rather than firms, bear most of the burden of the payroll tax

Suppose that in October, market analysts predict that the price of platinum will fall in November. What happens in the platinum market in October, holding everything else constant?

A) The demand curve shifts to the right. B) The supply curve shifts to the right. C) The supply curve shifts to the left. D) The quantity of platinum demanded and the quantity of platinum supplied both increase.

A significant problem of a dual exchange rate system is that it

(a) is difficult to administer. (b) leads companies to pursue rent-seeking behavior. (c) promotes black markets. (d) all of the above. (e) none of the above.