Until the 1980s, AT&T held a monopoly over the national market for phone services. Suppose that AT&T argued that it was a natural monopoly because the fixed cost of creating a nationwide phone network generated huge economies of scale, and that there was, therefore, no welfare loss associated with its monopoly.
Counter this argument by explaining how even a natural monopoly causes deadweight loss.

Baker industries’s net income is $24,000, its interest expense is $5,000, and its tax rate is 40%. its notes payable equals $27,000, long-term debt equals $75,000, and common equity equals $250,000. the firm finances with only debt and common equity, so it has no preferred stock. what are the firm’s roe and roic?

Perez, inc., applies the equity method for its 25 percent investment in senior, inc. during 2018, perez sold goods with a 40 percent gross profit to senior, which sold all of these goods in 2018. how should perez report the effect of the intra-entity sale on its 2018 income statement?

Which one of the following statements is true? ddt does not prevent disease from passing from agricultural animals to humans. cost was a major factor in the united states government's decision to ban ddt. many african governments concluded that the potential long-term health effects of ddt were not as serious as the immediate problem of insect control. ddt cannot accumulate in the fat of animals. the ddt ban in the united states has made it very difficult to control agricultural insect pests.