Evaluation of a monopoly

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Monopolies of buying foreign goods and selling them domestically are disadvantageous for foreigners and for those at home.

Of this double monopoly one part is disadvantageous to the people at home, the other to foreigners. For at home by their sole exportation they set what price they please on the husbandry and handiworks of the people, and by the sole importation, what price they please on all foreign commodities the people have need of, both which are ill for the people. On the contrary, by the sole selling of the native commodities abroad, and sole buying the foreign commodities upon the place, they raise the price of those, and abate the price of these, to the disadvantage of the foreigner: for where but one selleth, the merchandise is the dearer; and where but one buyeth, the cheaper: such corporations therefore are no other than monopolies, though they would be very profitable for a Commonwealth, if, being bound up into one body in foreign markets, they were at liberty at home, every man to buy and sell at what price he could.

Hobbes, Lev XXII 19