The Principles of Political Economy and Taxation — David Ricardo

In comparing therefore the value of the same commodity at different periods of time the consideration of the comparative skill and intensity of labour required for that particular commodity needs scarcely to be attended to as it operates equally at both periods One description of labour at one time is compared with the same description of labour at another if a tenth a fifth or a fourth has been added or taken away an effect proportioned to the cause will be produced on the relative value of the commodity Tanıtım Bülteninden

In comparing therefore the value of the same commodity at different periods of time the consideration of the comparative skill and intensity of labour required for that particular commodity needs scarcely to be attended to as it operates equally at both periods One description of labour at one time is compared with the same description of labour at another if a tenth a fifth or a fourth has been added or taken away an effect proportioned to the cause will be produced on the relative value of the commodity

In comparing therefore the value of the same commodity at different periods of time the consideration of the comparative skill and intensity of labour required for that particular commodity needs scarcely to be attended to as it operates equally at both periods One description of labour at one time is compared with the same description of labour at another if a tenth a fifth or a fourth has been added or taken away an effect proportioned to the cause will be produced on the relative value of the commodity