Nobel Prize winner Milton Friedman said that a bad central banker is like a “fool in the shower.” In a shower, of course, when you turn the faucet right now, it won’t show up in the showerhead for a few seconds. So if a “fool in the shower” is always making big changes in the temperature based on how the water feels right now, the water is likely to swing back and forth between too hot and too cold. How does this apply to central banking?