Which of the following is not a possible source of instability in velocity in the Monetarist model?

Which of the following changes would not shift the supply curve for a good or service?

a. a change in production technology b. a change in the price of the good or service c. a change in expectations about the future price of the good or service d. a change in input prices

One problem with using market values to measure GDP is that

A. prices for some goods change every year. B. market values of exported goods are usually priced in foreign currencies. C. some useful goods and services are not sold in markets. D. you cannot compare completely heterogeneous goods by using their dollar values.