John Stuart Mill,
Principles of Political Economy
(1871)
“ The wholesale trade, in the great articles of commerce, is really under the dominion of competition. There, the buyers as well as sellers are traders or manufacturers, and their purchases are not influenced by indolence or vulgar finery, nor depend on the smaller motives of personal convenience, but are business transactions. In the wholesale markets therefore it is true as a general proposition, that there are not two prices at one time for the same thing: there is at each time and place a market price, which can be quoted in a price-current. ”
