What are the instances of double coincidence of wants in the above example? Even if there are two people who want each other’s goods and are also willing to make an exchange, other issues could arise—in what proportion should the two goods be exchanged? In such cases, it becomes difficult to compare the value of one good against another. If one of the people feels that the exchange is disadvantageous, they would not be interested in the exchange. This is because there is no common standard measure of value.
In the situation given above, what are the cases where you could encounter the lack of a common standard measure of value?