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大卫·李嘉图:政治经济学及赋税原理·摘录 346

大卫·李嘉图《政治经济学及赋税原理》· On the Principles of Political Economy and Taxation · 投资

"Whether a coal mine, for example," he says, "can afford any rent, depends partly upon its fertility, and partly upon its situation. A mine of any kind may be said to be either fertile or barren, according as the quantity of mineral which can brought from it by a certain quantity of labour, is greater or less than what can be brought by an equal quantity from the greater part of other mines of the same kind. Some coal mines, advantageously situated, cannot be wrought on account of their barrenness. The produce does not pay the expense. They can afford neither profit nor rent. There are some, of which the produce is barely sufficient to pay the labour, and replace, together with its ordinary profits, the stock employed in working them. They afford some profit to the undertaker of the work, but no rent to the landlord. They can be wrought advantageously by nobody but the landlord, who being himself the undertaker of the work, gets the ordinary profit of the capital which he employs in it. Many coal mines in Scotland are wrought in this manner, and can be wrought in no other. The landlord will allow nobody else to work them without paying some rent, and nobody can afford to pay any.

出处: https://www.gutenberg.org/ebooks/33310
定位:Excerpt 346 · 核对日期:2026-10-19 · 核验:短摘录

白话

斯密说,煤矿能否提供地租,取决于肥力和位置。有些矿因贫瘠无法开采,产出不够支付费用;有些矿产出仅够支付劳动和资本利润,能提供利润但无地租,只有地主自己经营才划算。李嘉图引用这段话,是为了说明矿山地租同样由边际决定:最贫瘠的矿不付地租,较好矿的产出与最差矿的差额形成地租。所以地租不是价格的组成部分,而是价格差异的结果。

上下文

斯密以煤矿为例说明地租,李嘉图借用来支持自己的边际地租论。

今日一问

你能否用边际思维解释身边的租金差异?

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