How does inflation shape consumer sentiment post-COVID?
Core argument: Price-level shock vs. 2014–2019 trend drives consumer sentiment decline more than unemployment or spending changes alone.
[The chart in gallery] shows the full UMich series, along with two predictions from two statistical models, based on inflation, unemployment, real consumer spending, and the S&P 500. We trained the model on data from 1990-2019 and then forecast and backcast. As you see, both models fit the data well, even back to the 1950s. At least, they do until COVID and the shock to prices. Then the first model says we should be a lot happier, damnit! To explain the gap, [Daniel Posthumus and I added this variable] which we think of as a trend-break to the price level. We run a smooth trend through the CPI price level through 2019, and extend the trend’s 2014-19 growth rate. Think of that shaded area at the end as a quantifying of the extent to which people were shocked/surprised/angered by the jump in the price level. We plug the log difference between trend and actual into the model, which, as you see in the pullout above, tracks the actual decline in sentiment.

