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This picture should be sobering to anyone convinced that we have reattained price stability.
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Lots of people beating up on Larry Summers over his chart making recent disinflation look just like the mid-70s disinflation, which reaccelerated. Indeed, problematic on many fronts. But the biggest issue is that the story was very different 1/
Mid-70s disinflation was achieved via a huge rise in unemployment; reasons to wonder what would happen as U came down again 2/
This time no rise in U at all, so completely different process. Oh, and a lot of the inflation resurgence was about the Iranian revolution and oil prices 3/
Could inflation take off again? Yes. But 1975 is not a useful model of how that might happen. 4/
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I know everyone has done their Summers's graph take, but Krugman's point here really stands out if you redo the Summers graph with unemployment as the x-axis.
The 1973-1976 episode he compares now to goes straight to the right; ours loops straight to the left. It's pretty wild.
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I want to enlarge on Mike's point here. The chartcrime is a relatively minor issue. More important is the fact that some prominent economists are still suffering from SAD â Seventies Analogy Disorder 1/
In the 70s disinflation required extended periods of above-normal unemployment, so that a plot of unemployment against inflation (using PCE to avoid changing definition issues) showed clockwise spirals 2/
This was what Friedman/Phelps etc had predicted, and gave natural rate/sacrifice ratio models huge credibility. But it hasn't fit the 2020s inflation/disinflation story at all 3/
Here's what recent movements look like, switching to 3m changes because annual misses the extent of disinflation 4/
This really looks like the rise and gradual fall of a pandemic-related supply shock; attempts to squeeze it into a 70s-type framework are looking increasingly desperate 5/
Sorry, but this time really is different, and economists need to accept that 6/
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www.employamerica.org
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It is sobering to recall that the shape of the past decadeâs inflation curve almost perfectly shadows its path from 1966 to 1976 before it accelerated in the late 1970s.
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The Fed must stay focused on inflation, @LHSummers writes. https://t.co/bAIzqs90Ti
— Washington Post Opinions (@PostOpinions) 2023å¹´8æ25æ¥
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— Jeffrey Kleintop (@JeffreyKleintop) 2023å¹´8æ24æ¥
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That's not Larry's chart but @JeffreyKleintop's, and yes, the story was incomparably different in the 1970s.
— Marko Bjegovic (@MBjegovic) 2023å¹´8æ25æ¥
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This is a chart crime on two fronts.
— Jim Bianco (@biancoresearch) 2023å¹´8æ24æ¥
1. Different scales (Most overlays can be made to look similar when using different scales).
2. The calculation of CPI changes over time. The blue line is not the same methodology as the orange line.
Fortunately, there is a famous economist⦠https://t.co/KRIbVCw6Dg pic.twitter.com/ynpPkDNrmg
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Larry: Are you becoming chartist? ð(I kind of remember that something happened at the end of the 1970s, like a trippling of oil prices, which might be vaguely relevant. Do u expect it to happen again?)
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Olivier. I am not a technical analyst and I am well aware of the 1979 oil shocks. No historical situation ever matches the present.
But I think itâs relevant to inflation debates that premature declarations of victory, when inflation subsided, have been hallmarks of past inflation episodes. Don't you?
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Yesterday, I trolled Larry Summers, as I thought his graph was more misleading than helpful. But I fully agree with the major points of his WAPO column today: Inflation is still too high, unemployment very low, and deficits too large.
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