Beware any election-year stories that just happen to elicit a deep sense of things being astray. Larry Summers in particular has a long track record of playing complex angles in his public policy views. The technical argument in the paper is totally separate from the headline here. The headline is what matters. You can think of macroeconomic policy as having been trained on economic history, probably more so than any…
This is an almost deceptively bad characterization of Summers' data. Your comment implies Summers said inflation is still rising, when his proposed adjusted CPI also says inflation "came and went", as it is also just as far below its peak as the inflation of the official CPI is below its own. The difference is just that Summers' peaked later (plus higher, like the headline does mention) because of his inclusion of interest; while offical increase was declining his continued to rise just because during the increase of rates that increase offset the decrease in the increase of prices. Once rates stopped increasing this naturally also stopped, and his proposed inflation has been falling faster than official inflation did in order to close with it since [1].
Thus, no ultimate difference in failure to reject your null hypothesis.
[1] https://imageio.forbes.com/specials-images/imageserve/65fec8...