Which of the following best describes the relationship between the Herfindahl-Hirschman Index and the indicated type of market Market type Herfindahl-Hirschman Index （） ①A. Perfect competition 1800 ②B. Monopolistic competition 100 ③C. Monopoly 10000

单项选择题Consider the following two final consumer goods: Good W requires the inputs of raw material R and intermediate goods S and T. Good X requires the inputs of raw material R and intermediate goods U and V. If demand for Good W increases and demand for Good X decreases, which of the following out comes is least likely（）

A. Some of raw material R will be diverted away from the producers of Good X.
B. The price of Good U will decrease and the price of Good S will increase.
C. More resources will be devoted to producing Good W and less to producing Good T.

单项选择题In a regulated industry, the introduction of a marginal cost pricing role that maximizes total surplus would most likely be viewed as:（）

A. inefficient but leaves the natural monopoly incurring an economic loss.
B. inefficient and allows the natural monopoly to realize an economic gain.
C. efficient but leaves the natural monopoly incurring an economic loss.