On the eve of the Civil War, __________ power was more important than _____________ power, but by the end of the 19th century, 90 percent of manufacturing energy came from _________

The figure above shows the cost, marginal revenue, and demand curves of Golden Chow, a producer of dog food. The market for dog food is monopolistic competition. In the long run as new firms enter, Golden Chow cuts its output to 200 cans per day

Its excess capacity is ________ cans per day. A) 0 B) between 0 and 200 C) between 201 and 400 D) more than 401

One reason the supply of carpenters is greater than the supply of physicians is because:

a. carpenters demand less income. b. physicians do not belong to a union. c. of differences in human capital. d. carpenters belong to unions.