If two commodities are good substitutes for one another, e.g butter and margarine,an increase in the demand for one will reduce the demand for the other. This type of demand is called

One of the reason why the condition of supply of a commodity may change is

when the demand curve shift to the right it indicate that a larger quantity is demanded at each price. This is caused by one of the following

When the price of a commodity is below the equilibrium price the quantity demanded will exceed the quantity supplied. Such a situation is referred to as

The central bank controls the activities of other banks by all but one of the following