An article in the Wall Street Journal discussed the Ground Round restaurant chain, which had 219 restaurants at its peak in 1989 but today has only 22. According to the article, “Ground Round had its heyday in the 1980s, building its reputation on juicy hamburgers, a publike atmosphere and unlimited popcorn and peanuts.” Do restaurants face any particular problems in being able to earn an economic profit in the long run? Briefly explain.