During the period of capital ...

During the period of capital moving from one employment to another, the profits on that to which capital is flowing will be relatively high, but will continue so no longer than till the requisite capital is obtained.
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 David Ricardo

Quotes from the same author

I have endeavoured to show that the ability to pay taxes depends, not on the gross money value of the mass of commodities, nor on the net money value of the revenue of capitalists and landlords, but on the money value of each man's revenue compared to the money value of the commodities which he usually consumes.
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 David Ricardo
Adam Smith, and other able writers to whom I have alluded, not having viewed correctly the principles of rent, have, it appears to me, overlooked many important truths, which can only be discovered after the subject of rent is thoroughly understood.
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 David Ricardo
It is not by the absolute quantity of produce obtained by either class, that we can correctly judge of the rate of profit, rent, and wages, but by the quantity of labour required to obtain that produce.
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 David Ricardo
If then the prosperity of the commercial classes, will most certainly lead to accumulation of capital, and the encouragement of productive industry; these can by no means be so surely obtained as by a fall in the price of corn.
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 David Ricardo