Under a monetary system which maintained prices constant, on the average, the export or import of gold would be of no more importance than the export or import of corn or silk. From an economic standpoint the term _balance of trade_ is a misnomer, and is misleading. Equally misleading and erroneous is the idea that gold or silver is in any way necessary to foreign commerce, or that in consequence of a money being based on one of these metals such trade will be in any way enhanced. International trade is an exchange of commodities; not, to be sure, a direct barter, but an indirect one. One country exports those commodities which it can produce the cheapest, in exchange for those of other countries that are either not produced at all in the first country, or can be produced only at a greater cost than by import. The immediate force impelling to the export and import of commodities is, in all cases, a difference in their values in the two countries. This is no less true of gold than of other commodities, for gold will never move from one country to another except it be of lower value in the exporting than in the importing country, no matter how much the one may be owing the other. The expressions "balance of trade in favour of," or "against a country," means only that gold is at that time of higher value in one than in another country, by an amount above the cost of shipment, and is being exported or imported because there is a profit in so doing; but this furnishes no criterion whatever of the prosperity of a country. It frequently happens that gold moves for a considerable time from one country to another because of large production of gold in the exporting country. That cannot be considered a bad condition of business or unfortunate for the exporting country, unless the commodities received in exchange are useless, or are wasted. At other times it frequently happens that a country is importing gold, giving in exchange not only other commodities, but promises to pay back the value received, in the shape of bonds and stocks--running in debt, in fact. This may be a good or a bad thing for the country, as for an individual, according as the value received is profitably used or not. It certainly is no sure indication of real prosperity.