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The market price of every particular commodity is regulated by

the proportion between the quantity which is actually brought to

market, and the demand of those who are willing to pay the

natural price of the commodity, or the whole value of the rent,

labour, and profit, which must be paid in order to bring it

thither. Such people may be called the effectual demanders, and

their demand the effectual demand; since it maybe sufficient to

effectuate the bringing of the commodity to market. It is

different from the absolute demand. A very poor man may be said,

in some sense, to have a demand for a coach and six; he might

like to have it; but his demand is not an effectual demand, as

the commodity can never be brought to market in order to satisfy

it.