The most reckless and treacherous of all theorists is he who professes to let facts and figures speak for themselves.
Alfred MarshallWe might as well reasonably dispute whether it is the upper or the under blade of a pair of scissors that cuts a piece of paper, as whether value is governed by demand or supply.
Alfred MarshallProducer's Surplus is a convenient name for the genus of which the rent of land is the leading species.
Alfred Marshall