While the ECB and Bank of Japan are exploring negative interest rates, the US Federal Reserve is preparing us for a slow and cautious increase in short-term interest rates. Long-term rates remain at very low levels and inflation expectations have come under pressure and also remain below what they were a few months or years ago. And as this is going on markets are trying to figure out if they like low or high interest rates. And even if they decide that they like low rates, are negative rates too low? In all these debates there seems to be an unusual amount of what economists call money illusion or lack of understanding of the difference between nominal and real interest rates. This confusion, in my view, is partly motivated by the communication strategy of central banks that seem to obsess with the asymmetric nature of their inflation targets (for both the ECB and US Fed, inflation targets are defined as close but below 2%) and are not clear enough on their final goal and its timing. ...