<Tr> <Td> </Td> <Td> The neutrality of this article is questioned because it may show systemic bias . In particular, there may be a strong bias in favor of Capitalism . Please see the discussion on the talk page . Please do not remove this message until the issue is resolved . (June 2017) </Td> </Tr> <P> According to professor Milton Friedman, laws against monopolies cause more harm than good, but unnecessary monopolies should be countered by removing tariffs and other regulation that upholds monopolies . </P> <P> A monopoly can seldom be established within a country without overt and covert government assistance in the form of a tariff or some other device . It is close to impossible to do so on a world scale . The De Beers diamond monopoly is the only one we know of that appears to have succeeded (and even De Beers are protected by various laws against so called "illicit" diamond trade).--In a world of free trade, international cartels would disappear even more quickly . </P> <P> However, professor Steve H. Hanke believes that although private monopolies are more efficient than public ones, often by a factor of two, sometimes private natural monopolies, such as local water distribution, should be regulated (not prohibited) by, e.g., price auctions . </P>

What is monopoly and its government policy to control monopoly