Christian Zimmermann
@czimm-economist.bsky.social
Economics information economist informing economists. St. Louis Fed-FRED-RePEc-IDEAS-RED-EDIRC.
Homepage: https://ideas.repec.org/zimm/
RePEc profile: https://ideas.repec.org/e/pzi1.html#person
Homepage: https://ideas.repec.org/zimm/
RePEc profile: https://ideas.repec.org/e/pzi1.html#person
Pinned
RePEc Author Service
authors.repec.org
A quick thread on how RePEc serves you on Bluesky:
1/ You can add your Bluesky handle in your author profile. It will then be listed on your IDEAS page and wherever your name appears on IDEAS.
authors.repec.org
#RePEc #EconSky
1/ You can add your Bluesky handle in your author profile. It will then be listed on your IDEAS page and wherever your name appears on IDEAS.
authors.repec.org
#RePEc #EconSky
Who else in the economics profession is on BlueSky? Here is a listing of those how indicated their BlueSky handle in the RePEc Author Service
ideas.repec.org/i/ebluesky.h...
#RePEc #EconSky
ideas.repec.org/i/ebluesky.h...
#RePEc #EconSky
RePEc-registered Economists on Bluesky
ideas.repec.org
December 19, 2025 at 2:36 PM
Who else in the economics profession is on BlueSky? Here is a listing of those how indicated their BlueSky handle in the RePEc Author Service
ideas.repec.org/i/ebluesky.h...
#RePEc #EconSky
ideas.repec.org/i/ebluesky.h...
#RePEc #EconSky
FRED Blog:
US industrial production
With a nod to George Essig, the founding father of modern-day FRED
fredblog.stlouisfed.org/2025/12/us-i...
US industrial production
With a nod to George Essig, the founding father of modern-day FRED
fredblog.stlouisfed.org/2025/12/us-i...
US industrial production | FRED Blog
fredblog.stlouisfed.org
December 18, 2025 at 2:05 PM
FRED Blog:
US industrial production
With a nod to George Essig, the founding father of modern-day FRED
fredblog.stlouisfed.org/2025/12/us-i...
US industrial production
With a nod to George Essig, the founding father of modern-day FRED
fredblog.stlouisfed.org/2025/12/us-i...
Preparing a reading list you want to share? You can use MyIDEAS to build a bibliography and then make it public.
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
MyIDEAS
ideas.repec.org
December 18, 2025 at 1:54 PM
Preparing a reading list you want to share? You can use MyIDEAS to build a bibliography and then make it public.
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
Reposted by Christian Zimmermann
So Instacart showed different people different prices for eggs. Shocking?
Before the outrage, ignore the Twitter press release. Look at what they actually found.
Understand the facts and the economic theory to make sense of it
www.economicforces.xyz/p/instacarts...
Before the outrage, ignore the Twitter press release. Look at what they actually found.
Understand the facts and the economic theory to make sense of it
www.economicforces.xyz/p/instacarts...
Instacart's price discrimination isn't price discrimination
On the meaning of price discrimination
www.economicforces.xyz
December 17, 2025 at 9:28 PM
So Instacart showed different people different prices for eggs. Shocking?
Before the outrage, ignore the Twitter press release. Look at what they actually found.
Understand the facts and the economic theory to make sense of it
www.economicforces.xyz/p/instacarts...
Before the outrage, ignore the Twitter press release. Look at what they actually found.
Understand the facts and the economic theory to make sense of it
www.economicforces.xyz/p/instacarts...
Google Scholar attributes papers automatically to authors, a problem with homonyms when they do not clean up their profiles. It is also generous in matching citations. #RePEc requires authors to claim their papers and has stricter criteria for citation matching, thus does not inflate stats.#EconSky
Google Scholar’s citation errors skew h-index leaderboards
Thousands of mistakenly awarded citations left uncorrected highlight the perils of leaving profile curation to academics, say critics
www.timeshighereducation.com
December 17, 2025 at 1:44 PM
If you need RePEc data, there are more efficient ways to get it without scraping the web sites.
ideas.repec.org/getdata.html
#RePEc #EconSky
ideas.repec.org/getdata.html
#RePEc #EconSky
RePEc: getting the metadata
IDEAS is a central index of economics
research, including working papers, articles and software code
ideas.repec.org
December 16, 2025 at 2:21 PM
If you need RePEc data, there are more efficient ways to get it without scraping the web sites.
ideas.repec.org/getdata.html
#RePEc #EconSky
ideas.repec.org/getdata.html
#RePEc #EconSky
FRED Blog:
FOMC Summary of Economic Projections, December 2025
fredblog.stlouisfed.org/2025/12/fomc...
FOMC Summary of Economic Projections, December 2025
fredblog.stlouisfed.org/2025/12/fomc...
FOMC Summary of Economic Projections, December 2025 | FRED Blog
fredblog.stlouisfed.org
December 15, 2025 at 2:11 PM
FRED Blog:
FOMC Summary of Economic Projections, December 2025
fredblog.stlouisfed.org/2025/12/fomc...
FOMC Summary of Economic Projections, December 2025
fredblog.stlouisfed.org/2025/12/fomc...
RePEc also indexes book chapters, in fact about 85'000 were indexed in November.
ideas.repec.org/i/h.html
#RePEc #EconSky
ideas.repec.org/i/h.html
#RePEc #EconSky
Economics Book Chapter Series | IDEAS/RePEc
IDEAS is a central index of
economics research
ideas.repec.org
December 15, 2025 at 1:38 PM
RePEc also indexes book chapters, in fact about 85'000 were indexed in November.
ideas.repec.org/i/h.html
#RePEc #EconSky
ideas.repec.org/i/h.html
#RePEc #EconSky
And you can easily do that on BlueSky by clicking on the BlueSky symbol present on every IDEAS page.
ideas.repec.org
#RePEc #EconSky
ideas.repec.org
#RePEc #EconSky
December 12, 2025 at 1:24 PM
And you can easily do that on BlueSky by clicking on the BlueSky symbol present on every IDEAS page.
ideas.repec.org
#RePEc #EconSky
ideas.repec.org
#RePEc #EconSky
Cleveland Fed data on regional economic conditions | FRED Blog
fredblog.stlouisfed.org
December 11, 2025 at 3:29 PM
If you want to mention some economics research on social media or the web, use a link to a RePEc abstract page instead of a direct link: It will always stay up, provide context (cites, refs, author profile), often alternative versions (ungated link, journal article), and more.
#RePEc #EconSky
#RePEc #EconSky
Economics and Finance Research | IDEAS/RePEc
IDEAS is a central index of economics
and finance research, including working papers, articles and software code
ideas.repec.org
December 11, 2025 at 1:37 PM
As the year is winding down, it is time to think about adding next year's events to the Economics Virtual Seminar Calendar
ideas.repec.org/v/
#RePEc #EconSky
ideas.repec.org/v/
#RePEc #EconSky
Economics Virtual Seminar Calendar | IDEAS/RePEc
ideas.repec.org
December 10, 2025 at 1:38 PM
As the year is winding down, it is time to think about adding next year's events to the Economics Virtual Seminar Calendar
ideas.repec.org/v/
#RePEc #EconSky
ideas.repec.org/v/
#RePEc #EconSky
Manufacturing employment and productivity | FRED Blog
fredblog.stlouisfed.org
December 8, 2025 at 2:17 PM
As we are not confident our analysis of site traffic manages to properly weed out robotic access by AI tools, we will drop abstract views as criteria for author and institution rankings starting with the December 2025 numbers.
blog.repec.org/2025/11/10/a... (with update)
#RePEc #EconSky
blog.repec.org/2025/11/10/a... (with update)
#RePEc #EconSky
AI issues in RePEc
This post has an update Over the past year, various RePEc services have been struggling with issues stemming from artificial intelligence robots (AI bots), and this post is a short summary of what …
blog.repec.org
December 8, 2025 at 2:16 PM
As we are not confident our analysis of site traffic manages to properly weed out robotic access by AI tools, we will drop abstract views as criteria for author and institution rankings starting with the December 2025 numbers.
blog.repec.org/2025/11/10/a... (with update)
#RePEc #EconSky
blog.repec.org/2025/11/10/a... (with update)
#RePEc #EconSky
MyIDEAS allows you to follow additions to RePEc for authors, series, journals, JEL codes. Search keywords temporarily disabled, though.
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
MyIDEAS
ideas.repec.org
December 5, 2025 at 1:41 PM
MyIDEAS allows you to follow additions to RePEc for authors, series, journals, JEL codes. Search keywords temporarily disabled, though.
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
ideas.repec.org/cgi-bin/myid...
#RePEc #EconSky
RePEc sites have served over 600 million abstract views (TBH, the last couple millions came from AI tools, and we are not sure they were triggered by humans)
logec.repec.org
#RePEc #EconSky
logec.repec.org
#RePEc #EconSky
LogEc: Download Statistics
logec.repec.org
December 4, 2025 at 2:08 PM
RePEc sites have served over 600 million abstract views (TBH, the last couple millions came from AI tools, and we are not sure they were triggered by humans)
logec.repec.org
#RePEc #EconSky
logec.repec.org
#RePEc #EconSky
FRED Blog:
The divergence of electricity and natural gas prices
fredblog.stlouisfed.org/2025/12/the-...
The divergence of electricity and natural gas prices
fredblog.stlouisfed.org/2025/12/the-...
The divergence of electricity and natural gas prices | FRED Blog
fredblog.stlouisfed.org
December 4, 2025 at 2:03 PM
FRED Blog:
The divergence of electricity and natural gas prices
fredblog.stlouisfed.org/2025/12/the-...
The divergence of electricity and natural gas prices
fredblog.stlouisfed.org/2025/12/the-...
The problem got worse, now thrice the expected abstract views instead of twice. Further vetting is not going to move the needle much. I am considering dropping that as a ranking criterion.
#RePEc #economics
#RePEc #economics
December 3, 2025 at 2:11 PM
The problem got worse, now thrice the expected abstract views instead of twice. Further vetting is not going to move the needle much. I am considering dropping that as a ranking criterion.
#RePEc #economics
#RePEc #economics
RePEc lives from volunteers. A good example is EDIRC, the directory of economics institutions has captured the names of its contributors:
edirc.repec.org/contributors...
#RePEc #EconSky
edirc.repec.org/contributors...
#RePEc #EconSky
Economics Departments, Institutes and Research Centers in the
World: Contributors
Central index of economics institutions (academic, governmental and non-profit) organized by country and US state.
edirc.repec.org
December 2, 2025 at 2:39 PM
RePEc lives from volunteers. A good example is EDIRC, the directory of economics institutions has captured the names of its contributors:
edirc.repec.org/contributors...
#RePEc #EconSky
edirc.repec.org/contributors...
#RePEc #EconSky
FRED Blog:
Why did GDP and personal income diverge during COVID?
fredblog.stlouisfed.org/2025/12/why-...
Why did GDP and personal income diverge during COVID?
fredblog.stlouisfed.org/2025/12/why-...
Why did GDP and personal income diverge during COVID? | FRED Blog
fredblog.stlouisfed.org
December 1, 2025 at 4:27 PM
FRED Blog:
Why did GDP and personal income diverge during COVID?
fredblog.stlouisfed.org/2025/12/why-...
Why did GDP and personal income diverge during COVID?
fredblog.stlouisfed.org/2025/12/why-...
Already a new month, and time to make sure your RePEc profile is up-to-date for the November statistics.
authors.repec.org
#RePEc #EconSky
authors.repec.org
#RePEc #EconSky
RePEc Author Service
authors.repec.org
December 1, 2025 at 1:41 PM
Already a new month, and time to make sure your RePEc profile is up-to-date for the November statistics.
authors.repec.org
#RePEc #EconSky
authors.repec.org
#RePEc #EconSky
Black Friday Special! All services on RePEc are free! For a full year, will repeat next Black Friday.
repec.org
#RePEc #EconSky
repec.org
#RePEc #EconSky
RePEc: Research Papers in Economics
RePEc is a central index of economics
research, including working papers, articles and software code
repec.org
November 28, 2025 at 1:29 PM
Today in the US it is the day of Thanksgiving. This is the opportunity to thank all the volunteers who help index publications in RePEc, edit NEP reports, send corrections to EDIRC, amend Genealogy records, or edit Biblio topics. RePEc would not exist without them.
repec.org
#RePEc #EconSky
repec.org
#RePEc #EconSky
RePEc: Research Papers in Economics
RePEc is a central index of economics
research, including working papers, articles and software code
repec.org
November 27, 2025 at 1:43 PM
RePEc is run by volunteers, thus we rely a lot on self-help: publishers push their metadata, authors maintain their profiles, users can contact publishers about errors and omissions, etc. Do not hesitate to be proactive!
repec.org
#RePEc #EconSky
repec.org
#RePEc #EconSky
RePEc: Research Papers in Economics
RePEc is a central index of economics
research, including working papers, articles and software code
repec.org
November 26, 2025 at 1:55 PM