In this chapter, we learned that the quantity of Canadian currency outstanding per Canadian resident was $2026 in 2015. Suppose we were to try to use this number to estimate the amount of output produced in the underground economy in Canada during 2015. Discuss how we would use this information on the quantity of currency in circulation. What additional information would you want to have to come up with a good estimate? In your answer, you will need to consider how underground transactions might take place in Canada by other means than through the use of Canadian currency.