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Eric Posner

@ericposner.bsky.social

1K followers 220 following 47 posts

Law professor

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Economics 51%

Political science 27%

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Reposted by Eric A. Posner

jamelle @jamellebouie.net · Dec 20

the only reason to parse things this finely is to avoid conceding that you were ever wrong

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Reposted by Eric A. Posner

Greg Sargent @gregsargent.bsky.social · Dec 21

Whether Trump committed insurrection under the Constitution, and what to do about it, is obviously a legitimately contested question. Ironically, the real evasion here is declaring he self-evidently didn’t commit insurrection and then handwaving this away as a settled matter. 6/

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Reposted by Eric A. Posner

Binyamin Appelbaum @bcappelbaum.bsky.social · Jan 17

"Judging from questions in two hard-fought arguments that lasted a total of more than three and a half hours, the fate of a foundational doctrine of administrative law called Chevron deference appeared to be in peril."

Conservative Justices Appear Skeptical of Agencies’ Regulatory Power

Discarding a seminal precedent could threaten regulations in countless areas, including the environment, health care, consumer safety, nuclear energy and government benefit programs.

www.nytimes.com

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Eric Posner @ericposner.bsky.social · May 8

New paper: The Silicon Valley No-Poach Conspiracy
papers.ssrn.com/sol3/papers....

The Silicon Valley No-Poach Conspiracy

<div> The Silicon Valley no-poach conspiracy is the most important cartel no <span>one has heard of. It is rarely discussed in the cartel literature and i

papers.ssrn.com

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Reposted by Eric A. Posner

UChicago Law @uchicagolaw.bsky.social · Mar 24

Forbes features research from Prof. @ericposner.bsky.social and researcher Shivam Saran that compares AI and human judicial decisions.

AI Judges Follow The Law, Human Judges Follow Their Hearts, Study Reveals

AI follows law, but humans follow hearts. Study shows judges are swayed by sympathetic defendants, while AI judges consistently apply legal rules.

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Reposted by Eric A. Posner

UChicago Law @uchicagolaw.bsky.social · Mar 17

Prof. @ericposner.bsky.social and researcher Shivam Saran’s paper comparing the performance of federal judges against GPT is featured in @washingtonpost.com.

Opinion | A provocative experiment pits AI against federal judges

An experiment involving AI and federal judges reveals the humane element in justice.

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Eric Posner @ericposner.bsky.social · Mar 17

www.washingtonpost.com/opinions/202...

Opinion | A provocative experiment pits AI against federal judges

An experiment involving AI and federal judges reveals the humane element in justice.

www.washingtonpost.com

Eric Posner @ericposner.bsky.social · Mar 12

www.promarket.org/2025/03/11/a...

Antitrust from Trump to Biden to Trump - ProMarket

The new Trump administration’s antitrust leaders are unexpectedly maintaining the Biden administration’s enforcement priorities, including the 2023 Merger Guidelines. Eric Posner explains why this bip...

www.promarket.org

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Eric Posner @ericposner.bsky.social · Feb 25

I meant economic stagnation, maybe some social and political chaos, ruined reputations, low public morale

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Eric Posner @ericposner.bsky.social · Feb 25

Labor antitrust survives!
news.bloomberglaw.com/antitrust/tr...

Trump FTC Launching Task Force Focused On Corporate Labor Harms

The Federal Trade Commission is creating a task force to investigate corporate behavior that harms workers in ways that violate antitrust and consumer protection laws, Chairman Andrew Ferguson said Mo...

news.bloomberglaw.com

Eric Posner @ericposner.bsky.social · Feb 22

I think the Republic survives but the country will be wounded

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Eric Posner @ericposner.bsky.social · Feb 20

Claude.AI discusses ChatGPT's stint as judge on (fictional) international court
clsbluesky.law.columbia.edu/2025/02/19/t...

Eric Posner @ericposner.bsky.social · Feb 7

Sounds like L. must have read "Executive Unbound"

Eric Posner @ericposner.bsky.social · Feb 3

www.csmonitor.com/Business/202...

Inflation’s lasting pressure: A hotel worker’s story shows the struggle

Inflation has come way down since June 2022. But the issue might have decided the recent election. Here’s one story, from a Boston hotel worker, of how its effects still weigh on Americans.

www.csmonitor.com

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Reposted by Arvind Narayanan, Eric A. Posner, Sarah Kaplan , and 1 more Arvind Narayanan, Eric A. Posner, Sarah Kaplan, Duncan McLaren

Mark Lemley @marklemley.bsky.social · Feb 3

Giving access to SSNs, other data on government employees to non-employees like Musk is a violation of 5 USC 552a, and carries with it a penalty of $1000 per person whose data was accessed. We are building a case. Govt employees who want to participate should contact me directly

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Reposted by Eric A. Posner

UChicago Law @uchicagolaw.bsky.social · Jan 30

Prof. @ericposner.bsky.social discusses presidential authority on the Takeout Podcast.

Power Moves: Professor Eric Posner on Presidential Authority

Donald Trump swept into office this week with a deluge of executive actions aimed at reshaping the federal government in his image. The bounds of presidential power have evolved over the country’s…

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Reposted by Eric A. Posner

Jacob Goldin @jacobsgoldin.bsky.social · Jan 27

Today is a big day for US tax policy - it’s the first time you can start your tax return using information the IRS already has about you: directfile.irs.gov This is government efficiency in action

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Reposted by Eric A. Posner

Jack M. Balkin @jackbalkin.bsky.social · Jan 20

The Supreme Court Meets the Free Speech Triangle.

My latest article discusses Moody v. NetChoice. It's now available on SSRN.

papers.ssrn.com/sol3/papers....

<i>Moody v. NetChoice</i> - The Supreme Court Meets the Free Speech Triangle

<div> <i>Moody v. NetChoice</i> is the Supreme Court's first attempt at applying the First Amendment to social media content regulation. Private infrastructure

papers.ssrn.com

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Reposted by Eric A. Posner

Jack Goldsmith @jacklgoldsmith.bsky.social · Jan 20

My take on Trump 2.0 at its outset. Plenty in here for everyone to dislike. www.nytimes.com/2025/01/20/o...

Opinion | Can Trump Be a Great President?

Pushing power to the limit does not guarantee presidential success.

www.nytimes.com

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Reposted by Eric A. Posner

Benjamin Duerr @benjaminduerr.com · Jan 19

“The ruins of international law are all around us”, writes @ericposner.bsky.social on @projectsyndicate.bsky.social. Maybe. But it ignores the progress in some fields and the fact that ‘ruins’ in the past tended to lead to stronger laws: 1918, 1945, 1994,… www.project-syndicate.org/commentary/i...

What Happened to International Law? | by Eric Posner - Project Syndicate

Eric Posner sees the web of treaties, conventions, and institutions as another victim of the anti-globalization backlash.

www.project-syndicate.org

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Eric Posner @ericposner.bsky.social · Jan 16

www.project-syndicate.org/commentary/i...

What Happened to International Law? | by Eric Posner - Project Syndicate

Eric Posner sees the web of treaties, conventions, and institutions as another victim of the anti-globalization backlash.

www.project-syndicate.org

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Eric Posner @ericposner.bsky.social · Jan 15

Can Judge AI decide legal cases?
papers.ssrn.com/sol3/papers....

<p>Judge AI: Assessing Large Language Models in Judicial Decision-Making</p>

<p><span>Abstract. Can large language models (LLMs) replace human judges? By replicating a prior 2 x 2 factorial experiment conducted on 31 U.S. federal judges,

papers.ssrn.com

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Reposted by Eric A. Posner

Samuel Moyn @samuelmoyn.bsky.social · Jan 3

John Roberts is concerned about increasing calls to defy Supreme Court rulings. Actually, though, defiance is already a standard part of our legal system. www.dissentmagazine.org/article/we-a...

We Are Already Defying the Supreme Court - Dissent Magazine

The risks of calling on politicians to push back against the court must be weighed against the present reality of a malign judicial dictatorship.

www.dissentmagazine.org

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Reposted by Eric A. Posner

Geoffrey Manne @geoffmanne.bsky.social · Dec 19

@ericposner.bsky.social recently argued there's incontrovertible evidence supporting more antitrust scrutiny of labor markets & criticized Melissa Holyoak's skepticism of labor-related provisions in the FTC’s proposed HSR rules. But is the evidence really so clear? www.promarket.org/2024/10/24/...

Is Labor Antitrust a "Nonexistent" Problem? - ProMarket

In a recent revision of its Premerger Notification Regulation, the FTC removed labor market provisions from the previous draft as Commissioner Melissa Holyoak dismissed them as "a solution in search of a nonexistent problem." Eric Posner argues that her assessment contradicts a substantial body of academic research showing that labor market concentration is indeed a serious concern.

www.promarket.org

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Reposted by Eric A. Posner

Stephen @stephent.bsky.social · Dec 17

Pretty remarkable table from gavekal. Not unprecedented, but it’s close

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Reposted by Eric A. Posner

Florian Ederer @florianederer.bsky.social · Dec 16

Mergers are followed by large and persistent increases in lobbying activity, both by individual firms and by industry trade associations, suggesting that firms with market power will also attempt to gain political power.

www.nber.org/papers/w33255

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Reposted by Eric A. Posner

Florian Ederer @florianederer.bsky.social · Dec 14

There is a common notion in antitrust that greater output benefits workers.

But this paper shows that if firms have market power, this is not always the case. At high levels of markups, firms may REDUCE their (labor) input demand when they become more productive.
www.dropbox.com/s/33hq4dlpfz...

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Reposted by Eric A. Posner

Jacob Posner @jacobposner.bsky.social · Dec 12

I wrote another story on housing! This one explains why rent and home prices have shot up, and what can be done about it.

Jerusalem Demsas' new book, "On The Housing Crisis: Land, Development, Democracy" was a big inspiration.

www.csmonitor.com/Business/202...

Why is the US in a housing crisis, and what can be done about it?

More people are seeking homes than there are places to buy or rent, which contributes to high prices. Here’s what led to the housing crisis, and some potential solutions.

www.csmonitor.com

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Reposted by Steven C. Salop

Eric Posner @ericposner.bsky.social · Dec 11

@superwuster.bsky.social @stevesalop.bsky.social @sherman1890.bsky.social The FTC really botched the labor market analysis. The court was sympathetic to their approach and accepted the market definition but complained that it was not supplied with modeling or data, not even HHIs.

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Eric Posner @ericposner.bsky.social · Dec 11

www.project-syndicate.org/commentary/u...

Trump’s Pro-Corporate Populism Cannot Last | by Eric Posner - Project Syndicate

Eric Posner thinks the next president will be forced to choose between big business and the forgotten man.

www.project-syndicate.org

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