Mark G. Sheppard
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markgsheppard.com
Mark G. Sheppard
@markgsheppard.com
Inequality/Mobility/Design.
Econ PhD Candidate, The Graduate Center.
Researcher @NBER.org.
2nd Lt., U.S. National Guard.
Former Congressional Staff.
#FederalReserve Chairman #JeromePowell says the Department of Justice served grand jury subpoenas tied to Senate Banking Committee testimony, and argues the threat is aimed at central bank independence. #EconSky
January 12, 2026 at 2:30 AM
Right, though these measures are supposed to be seasonally-adjusted, I worry there's a degree of under-seasonalization happening.

But also-also, more economically vulnerable groups (racial minorities, low educated, etc) tend to be underemployed. And by extension, signal downturns earlier.
January 9, 2026 at 3:58 PM
When you unpack unemployment by race, and utilize that data in a turning point framework, marginalized racial minorities tend to signal downturns sooner (albeit with more noise).
January 9, 2026 at 3:44 PM
Using #SahmRule -style indicators with labor utilization shows a gradient: broader measures of underemployment (esp. U-6) flag rising slack—because vulnerable workers tend to be underemployed.

Web Interactive: markgsheppard.github.io/SahmRule/
🚨WP🚨 papers.ssrn.com/sol3/papers....
#JobsDay #EconSky
January 9, 2026 at 3:27 PM
With respect to the "slow to hire/fire" rhetoric, data shows using unemployment by: race, u-measure and education, in a #SahmRule like function, by @claudia-sahm.bsky.social, shows some are consistently "first to be fired" in a downturn.

#EconSky #JOLTS

🚨New WP🚨 papers.ssrn.com/sol3/papers....
January 7, 2026 at 11:06 PM
POV: FRED every first Friday of the month.
#JobsDay #JobsReport #EconSky
January 2, 2026 at 1:20 PM
The landing page of the working paper website also has an interactive D3 graphic that pretty clearly shows that recession responsiveness of labor-based turning point indicators increases when you input more sensitive measures of underemployment, it's basically a gradient from U1 to U6. #EconSky
December 30, 2025 at 8:37 PM
I made an accompanying website with interactive tool for the the working paper, so people can browse the data. And it clearly shows U6 outperforms U3 by about a month, with basically the same accuracy. I can also send you R code for U6-U5, which does fine.

markgsheppard.github.io/SahmRule/int...
December 30, 2025 at 8:35 PM