Refer to the figure below.________ inflation will eventually move the economy pictured in the diagram from short-run equilibrium at point ________ to long-run equilibrium at point ________, 

The figure above shows that as a result of the tariff, producer surplus in the United States

A) decreases by $105 million per year. B) increases by $55 million per year. C) decreases by $30 million per year. D) decreases by $20 million per year. E) remains unchanged.

Data concerning the four-firm concentration ratios for U.S. manufacturing industries indicate that

a. very few oligopolies exist in the real world but the oligopoly model is still useful because it tells us something about firm behavior b. oligopolies are the second most prevalent market structure, monopoly being the first c. the four leading firms usually have less than 10 percent of industry sales d. the ratios are considerably less than the ratios in Canada and Western Europe e. oligopolies are very common