 A more or less common view of Spanish Scholastics on just price is that the value of goods—and money—depends on estimation, not primarily on the costs of production, nor on the needs of buyers (Grice-Hutchinson 1952: 48–51). It is not the communis aestimatio of theologians that determines the natural price, but rather that of businessmen, as Molina says (Molina-DII II, 407); and it is not a fixed margin, but moves within a certain range, depending also on the quantity of goods and money available. Monopolies are criticized by Molina because they make such a determination of just price impossible (Molina-DII II, 345). Some authors argued for a public limitation on the price of foodstuffs. Molina favored support of the poor but hesitated to make only corn dealers pay for it, because a fixed price would prevent merchants from importing corn, thus damaging the common good (Molina-DII II, 365).