
Chapter 15 Money, Interest Rates, and Exchange Rates 78
9. Velocity is defined as real income divided by real balances or, equivalently, nominal income divided
10. If an increase in the money supply induces an increase in real output in the short run, then the short-run
decrease in the real interest rate will not be as pronounced as it was without the increase in real output.
In the diagram below, the money supply rises from Ms,1 to Ms,2. This causes real output to rise from Y1
11. As the interest rate falls, people prefer to hold more cash and fewer financial assets. If interest rates
were to fall below zero, people would strictly prefer cash to financial assets as the zero return on cash
12. One clear complication that a zero interest rate introduces is that the central bank is “out of ammunition.”
It literally cannot reduce interest rates any further and thus may struggle to respond to additional shocks
that hit the economy over time. The central bank is still not completely powerless, it can print more
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