The more I think about the current debate about inflation, the more I am inclined towards the following remarkable conclusion. We currently do not have a good framework to explain inflation, neither cyclically nor structurally. Perhaps more appropriately, the old consensus among economists and policymakers on what inflation is, how it arises, and what to do about it has been severely challenged, if not shattered entirely. In a post-pandemic world of a clear, and almost textbook, inflationary mismatch between demand and supply, this has created the odd situation in which everyone is talking about inflation, and more recently inflation expectations, concluding that it either doesn’t matter or that we don’t understand how inflation works in the first place. Nowhere is this clearer than in the debate about whether presently high inflation is transitory or not. The thrust of this discussion has as much to do with the main interlocutors convincing each other that high inflation doesn’t matter, as it is about agreeing on what, in fact, transitory means.
Read MoreThe finance and economics commentariat has been busy in the past few months educating each other about what inflation is, and what isn’t. To re-cap, just because prices are going up doesn’t mean that inflation is. Inflation, after all, is the rate at which prices are advancing, not the fact that prices are rising in themselves. More specifically, just because prices go up a lot in period 1, inflation can’t really be said to be accelerating unless the rate at which prices go up is higher in period 2, 3 and so on. To complete the circle; if prices were falling, we’d call it deflation, and the same argument on the rate of decline would apply, with an inverse sign. The amount of time spent by economists pointing out this trivial point is mostly an attempt to assure each other, and policymakers, that the spectacular CPI and PPI headlines we presently see on the screens are nothing to worry about. It follows that slowing the pace of asset purchases, not to mention raising interest rates, would be a grave and unforgivable error.
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