Profit margin

Definition and stakes

Roy B. Kester,  Accounting theory and practice… (1922)

“ As competition becomes keener and the margin of return per unit of product becomes smaller, he has to increase his volume of business to secure the same amount of profit as when he did a lesser volume of business.
To produce goods it is necessary to use the saved wealth of former periods to pay the expenses of materials, labor, management, etc., of the present period. One must consume wealth to produce wealth. After his product is made, he must seek the best market for its exchange or sale.
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Source: Gutenberg

Portrait of John Bates Clark John Bates Clark,  Essentials of Economic Theory

“ Values Static only when the Gains of Capital in Different Industries are Equalized.—If capital is creating more in one industry than in another, there is a margin of profit for the entrepreneurs in the exceptionally productive industry. They pay as interest on the capital they use only the market rate, which is what equal amounts of capital can produce and get elsewhere. If they produce more in the one group, the entrepreneurs there can pocket the excess as they did in the case of the product of labor. ”
Source: Gutenberg

Arthur Isaac Fonda,  Honest Money

“ When the value of a commodity falls to or below the cost of production, or even when it approaches it so closely as to reduce the margin between the two—the producer's profit—below that in other industries, then, men will cease to produce the one and turn their labour and capital to producing the others which offer greater profit, thus lowering the supply of the abandoned product and raising that of the more profitable, thereby affecting the value of both. ”
Source: Gutenberg

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