In a free economy, in which wages, costs and prices are left to the free play of the competitive market, the prospect of profits decides what articles will be made, and in what quantities—and what articles will not be made at all. If there is no profit in making an article, it is a sign that the labor and capital devoted to its production are misdirected: the value of the resources that must be used up in making the article is greater than the value of the article itself. One function of profits, in brief, is to guide and channel the factors so as to apportion the relative output of thousands of different commodities in accordance with demand.

- Henry Hazlitt