David J. Greenwald Professor of Law at Columbia University
Joined June 2019
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Joshua Mitts retweeted
SITUATION DETECTED: A man representing himself in a Connecticut court hid prompt injections in official filings designed to manipulate AI. The instructions, written in tiny white text invisible to humans, told any AI reviewing the documents to side with him, per 404 Media.
Joshua Mitts retweeted
Columbia is opening its Global Center in Tel Aviv, the culmination of more than 8 years of work. @Columbia has more Israeli students than any other Ivy, a large alumni community living in Israel, and many faculty collaborating with Israeli universities. Each year, a tremendous number of Columbia students travel to Israel - many with @cbhillel This center gives Columbia affiliates another opportunity to engage with Israel in a serious way.
columbiaspectator.com/news/2…
Joshua Mitts retweeted
Well done @moran_ofir & @profmitts
From Iran to Taylor Swift: Informed Trading in Prediction Markets, corpgov.law.harvard.edu/2026… #corpgov
Joshua Mitts retweeted
The University's updated statement, communications.news.columbia…, makes clear currently recognized student groups cannot affiliate with the group that calls itself "CUAD."
Joshua Mitts retweeted
The group that calls itself “CUAD" is not a recognized student group, or affiliated in any way with the University. There is no evidence that anyone currently in control of their account is a current Columbia student, staff, or faculty member. They are illegally using the Columbia name.
ALT A blue background that includes the Columbia University logo.
Readers added context they thought people might want to know
An open letter from Columbia faculty members in support of Columbia University Apartheid Divest (CUAD) was published in May 2024. The signatories (most of whom still work at the university) can be found here.
x.com/ManhattanMingl…
Joshua Mitts retweeted
Excited to share that our new paper is now live on the @HarvardCorpGov.
This work with @profmitts uses a unique natural experiment to show how processing costs affect market quality - challenging traditional assumptions about how efficiently markets incorporate public information
How Processing Costs Drive Market Efficiency: Evidence from U.S.-Israel Dual-Listed Securities, corpgov.law.harvard.edu/2025… #corpgov
Joshua Mitts retweeted
These were cousins of a key member of my staff. Their lives were stolen by hatred. Their memory steels our purpose. We will confront antisemitism without hesitation or compromise!
Twins Roi and Guy Berdichevsky were 10 months old when Hamas terrorists stormed their home in Kibbutz Kfar Aza on October 7th. Their parents Itay and Hadar were brutally murdered in front of them. After killing Itay and Hadar, the Hamas monsters left babies Roi and Guy lying next to the lifeless bodies of their mother and father and for 13 hours, the babies were alone in the house, no food, no milk, no water, no electricity, no air conditioning in the intense heat. Just the cries of two infants echoing through the ruins. The terrorists had booby-trapped the home, deliberately using the crying of the babies to lure IDF soldiers into a deadly ambush, intending to kill the rescuers and the babies with them.
Thankfully, IDF forces managed to detect and disarm the explosives. The trap was defused. Roi and Guy were saved.
Their survival is a miracle but the horror they were left in is unimaginable
May the memories of Itay and Hadar be a blessing 💔🕯️
Joshua Mitts retweeted
It’s barely been 24 hours, and Columbia and Barnard have already suspended nearly 100 students and alumni for violently occupying Butler Library.
This is strong leadership that values real education over performative activism. There’s hope for Columbia!
nypost.com/2025/05/08/us-new…
Joshua Mitts retweeted
Important to note that this was ongoing for a while and is unrelated to and unaffected by the recent “happenings” related to Columbia. It reached its natural conclusion after a long, careful, and thoughtful process
.@Columbia students expelled and suspended for taking over Hamilton Hall last spring. I commend the University Judicial Board for making these tough decisions, the Rules administrator for his work and the university administration for navigating this very complex process. 1 /2
Joshua Mitts retweeted
📢 It's out! My new book "Safe Havens for Hate" explores how extremists exploit gaps in online moderation to spread hate across platforms. Out now with @PrincetonUPress!
📖 Read more & order: press.princeton.edu/books/ha…
Joshua Mitts retweeted
The advance copy of my book, Safe Havens for Hate, is here! It offers a deep dive into the moderation of harmful content on social media and explains why efforts to combat online extremism keep failing. Official release March 4! press.princeton.edu/books/ha…
Joshua Mitts retweeted
January 21, 2025 Statement From Interim President Katrina Armstrong on Class Disruption: communications.news.columbia…
ALT A graphic reading: "January 21, 2025 Statement From Interim President Katrina Armstrong on Class Disruption Today a History of Modern Israel class was disrupted by protesters who handed out fliers. We strongly condemn this disruption, as well as the fliers that included violent imagery that is unacceptable on our campus and in our community. No group of students has a right to disrupt another group of students in a Columbia classroom. Disrupting academic activities constitutes a violation of the Rules of University conduct and the nature of the disruption may constitute violations of other University policies. We will move quickly to investigate and address this act. We want to be absolutely clear that any act of antisemitism, or other form of discrimination, harassment, or intimidation against members of our community is unacceptable and will not be tolerated."
Joshua Mitts retweeted
A good-governance petition & a counter petition that circulated @Columbia were reviewed by Stand Columbia.
Engineering professors are 5% of the faculty and 14% of the good governance petition signers.
Humanities professors are 8% of the faculty and 43% of counter petition signers
Joshua Mitts retweeted
The real hero of the @EdWorkforceCmte report on Antisemitism is Brian Cohen @brcohen the Executive Director of @cbhillel who has been tirelessly advocating on behalf of the @Columbia & @BarnardCollege Jewish and Israeli community – at Manhattan, NY
Joshua Mitts retweeted
Jews and Israelis at Columbia will not be intimidated out of grieving for our brothers and sisters whose lives were stolen. Tomorrow is for them.
It is our responsibility to tell their stories. If you have a Columbia ID, join us on campus tomorrow to bear witness.
Joshua Mitts retweeted
"This is a significant step toward creating a safer and more inclusive environment for Jewish and Israeli students," said @ColumbiaLaw Prof Josh Mitts @profmitts
Columbia University announced the revision of its anti-discriminatory guidelines, introducing new policies explicitly addressing the use of terms like "Zionist" when employed to target Jews or Israelis / @Etanetan23
haaretz.com/us-news/2024-09-…
Joshua Mitts retweeted
We welcome this crucial, positive update to the @Columbia Anti-Discrimination and Harassment Policy clarifying that anti-Zionist language can be antisemitic. Thank you @profmitts for leading this effort
.@Columbia updated the Anti-Discrimination & Harassment Policy. It contains “scenarios”, one of which illustrating that *“Zionist” cannot be used anymore as code word to target students from protected classes*
institutionalequity.columbia…
Joshua Mitts retweeted
Talked to @rebeccamassel about the letter calling @Columbia to clarify the policies governing demonstrations, and to follow @nyuniversity in making sure that Zionist is stopped being used as a code word for targeting students from protected groups – at Manhattan, NY
Over 225 faculty and staff published a letter addressed to interim University President Katrina Armstrong on Aug. 29 requesting that she clarify policies, including regulations on where and when protests can be held.
l8r.it/bKRm
Joshua Mitts retweeted
Common sense alert! @Columbia must clarify and enforce policies.
@profmitts — “It’s not fair to subject students to vague language and vague rules.”
He’s right. Without clear rules and enforcement, we have a culture of no accountability that actually inhibits free speech!
Joshua Mitts retweeted
NEW @FreeBeacon: A @ColumbiaLaw Review article that argues Jews "capitalized on the Holocaust" was subject to an atypical editing process that omitted "a large number of Jewish students," according to sources familiar with the process.
Read more here:
freebeacon.com/campus/contro…
