> why buy something today if it will be cheaper tomorrow? Because you want it today. The "fear of deflation" argument is now pervasive among monetary theorists. The argument goes that if people know that prices will fall, they will indefinitely delay all economic activity. This ignores the time preference aspect of economic decision making. For example, I will buy my cup of coffee today rather than wait a day or week…
The disagreement is whether or not artificially generating economic activity by inducing inflation is a good thing or a bad thing.
The Austrians think that the increased economic activity consists largely of malinvestments due to artificially cheap credit, which will cause a short-term boom, followed by a subsequent crash.
The Keynsian view is that you can ease out of the boom without a crash, and that the markets will take too long to equilibrate without such an artificial increase in monetary supply ("In the long term, we're all dead").