Examples of Monopolies:: International Diamond Trade (DeBeers); Local Daily Newspaper in many areas; Refreshments at public entertainment (Movies, Zoos, Concerts, Sporting Events etc.); Local Utilities (Natural Monopolies)

You can probably think of many other monopolies of one sort or another. Notice again that none of these is a large US firm. As we will see in the section on Industrial Policy, US law prevents monopolies. Indeed, in larger cities where there is a single daily newspaper, the Justice Department had to make a determination that cost factors only permitted one profitable paper in order for the mergers that inevitably led to a single paper to be legal.