RĂ¼diger Bachmann, Tim Berg, and Eric Sims have an interesting article, "I
nflation Expectations and Readiness to Spend: Cross-Sectional Evidence" in the
American Economic Journal: Economic Policy.
Many macroeconomists have advocated deliberate, expected inflation to "stimulate" the economy while interest rates are stuck at the lower bound. The idea is that higher expected inflation amounts to a lower real interest rate. This lower rate encourages people to spend today rather than to save, which, the story goes, will raise today's level of output and employment.
As usual in macroeconomics, measuring this effect is hard. There are few zero-bound observations, fewer still with substantial variation in expected inflation. And as always in macro it's hard to tell causation from correlation, supply from demand, because from despite of any small inflation-output correlation we see.
This paper is an interesting part of the movement that uses microeconomic observations to illuminate such macroeconomic questions, and also a very interesting use of survey data. Bachman, Berg, and Sims look at survey data from the University of Michigan. This survey asks about spending plans and inflation expectations. Thus, looking across people at a given moment in time, Bachman, Berg, and Sims ask whether people who think there is going to be a lot more inflation are also people who are planning to spend a lot more. (Whether more "spending" causes more GDP is separate question.)
The answer is... No. Not at all. There is just no correlation between people's expectations of inflation and their plans to spend money.
In a sense that's not too surprising. The intertemporal substitution relation -- expected consumption growth = elasticity times expected real interest rate -- has been very unreliable in macro and micro data for decades. That hasn't stopped it from being the center of much macroeconomics and the article of faith in policy prescriptions for stimulus. But fresh reminders of its instability are welcome.
At first blush, this just seems great. Finally, micro data are illuminating macro questions.