happen that 5-cent fares will yield it the greatest net income. It is often said that it is competition which has brought our rates of railroad transportation down to their present low point. While this is largely true, it is also true that the tendency to foster the growth of traffic by making a low tariff has been a large factor in bringing rates down to a reasonable point. Another example of this principle's operation is in the case of monopolies protected by the patent laws. In this case the collection of only a moderate royalty will generally result in greater profits to the inventor than he would secure by exacting a large fee, because of the greatly increased sales in the former case.
It should not be understood, however, that this principle has its only application in cases similar to the two mentioned. There is hardly an industry, monopolized or competitive, into which it does not enter to effect important results. It is to be noted, however, that it is least effective where the demand for the monopolized article is least sensitive to a variation in price. This fact should be considered by those who are fond of arguing that this principle alone is always sufficient to prevent monopolies from doing much harm. While it is powerful in the case of such monopolies as we have mentioned, where the demand for the commodity furnished varies greatly with the price, in the case of the great copper trust or of the quinine trust or of any monopoly controlling the great staples of human consumption, it seems plain that it can have little effect. Nor do we need to base our proof that this principle is not a sufficient remedy upon this ground alone. Grant it to be true that a certain monopoly makes the greatest net profit when its rates or prices are at a certain point; then will it not be apt to set them slightly above that point, where they will give nearly the same profit with a considerable decrease in the volume of business transacted and in the corresponding labor and responsibility? And, again, the point where it makes the greatest net profit is considerably above the point where it is of the greatest possible benefit to the community at large. This latter end is attained when it uses its facilities to their full capacity for the benefit of