9. How would you incorporate security considerations/costs into the transactions demand model? What would this imply for the demand for currency in a relatively insecure urban environment (a) compared with a relatively safe one, (b) when owner-identified smart cards become available? Do these factors affect the demand for demand deposits? How would the proportion of currency to demand deposits be affected in these cases?
10. Can the transactions demand model be used to explain why financial innovations in recent decades have reduced the transactions demand for M1?
11. Are transactions demand models useless, as Sprenkle (1969) argued? If they are, how would you explain the demand for M1 or just for demand deposits in the economy?

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