🚨New paper🚨
Algorithmic Collusion by Large Language Models
Joint w/
@sarafish_
&
@RanShorrer
LLM use is automating many business decisions. Pricing might be next (or is already).
What if multiple firms decide in good faith to use off-the-shelf-LLMs for pricing? 1/3
#EconTwitter
We construct a novel dataset by asking 3000 academics to label a viral photo of Einstein/Ken/Oppenheimer with discipline names. These shed new light on how disciplines are perceived both by their practitioner and by others. A particular discipline with surprising perception is 1/
Thrilled to share I'll be joining
@Harvard
this summer as an Assistant Professor of Economics, with a joint appointment also as Assistant Professor of Computer Science
@hseas
. So grateful for Harvard Econ's open-mindedness & thankful to more ppl than a tweet can fit.
#EconTwitter
That's a wrap on
@Harvard
ECON2070 "A Computer Science Toolbox for Modern Economic Theory," to my knowledge the 1st attempt at such a grad course at an econ dept. Had a blast building&teaching it, and evaluations say so did students!
#EconTwitter
Syllabus:
Pro-Israel gatherings in universities (all that I've seen):
- mourning the murdered and calling for the return of the abducted
- NOT calling for any violence
- condemning Hamas terrorism, NOT even mentioning that Hamas was democratically elected in Gaza
Anti-Israel gatherings in
Today
@MIT
. Make no mistake, “from the river to the sea” is a call for genocide. How are Israeli/Jewish students, staff, and faculty supposed to feel safe on campus? Alongside hate, this rally used the ignorant participants to spread lies also unbecoming of an elite institution.
Shabbat dinner table at
@Harvard
yard for over 200 abducted hostages who are still in Gaza for almost a month. The leftmost high chair is for Kfir, 9 months old when abducted, who has now spent one tenth of his life (and counting) in Gaza without anyone knowing his condition.
My words in the beginning of my lesson at
@Harvard
@HarvardEcon
@hseas
yesterday:
These are difficult times for me and for others. For me personally, as we speak, my mother is sitting in a shelter. So are my parents in law. So is my two-year-old niece. Please be understanding if
This will be a fun semester!
(
@caseyfeigh
we don't know each other, but thought you may be pleased to know your tweet was the first example in a
@HarvardEcon
course on incentives. Given your niece's impressive game theory skills at 3y/o, I hope to see her in class in 1½ decades)
Imagine a 9/11 with 10x times more murdered; with many more children and elderly massacred; with the terrorists conquering US towns and having the choice to spare each of the fatalities separately, but again and again choosing to butcher them all, sometimes also raping them; with
So, let me get this straight. Even when faced with overwhelming independent evidence (including footage aired by Al-Jazeera) that what hit the hospital in Gaza was an Islamic Jihad missile, some people prefer to "take Hamas's word" that all this evidence is false and instead
I love math, but framing non-mathy fields as "swapping icons in HTML" is IMHO detrimental in 2 ways:
1. Presents things such as human-computer interaction & large-scale software engineering/design as trivial.
2. Teaches students to think some fields are superior to others. 1/2
Every year I teach CS theory, I find that I need to apologize less and less about having so much math content. CS practice is getting more & more mathy.
Now I just ask students if they want to their future job to be one where they read texts of first type, or the second type:
Really,
@nytimes
? Is it so hard to write a title that makes it clear who did the surprise assault and who the response? Maybe even use a different verb ("murdered"?) for the innocent Israeli citizens rather than Palestinian Hamas terrorists? What a pathetic excuse for journalism.
Answering an email from a prospective PhD student. Noticing that it's the weekend. Adding "PS Please don't infer in any way from the fact that I'm answering you on a weekend that I would ever expect you to work on a weekend." Sending. Normalize a healthy
#WorkLifeBalance
.
If your rec letter says the RA was heavily involved in every step of the project and contributed so many new ideas, yet I see you didn't make them a coauthor, then either you're lying or you should be ashamed of yourself for not making them a coauthor. My money is on the latter.
@Idaneretz
@Duduoppe
היי עידן. בתור פרופסור בהרווארד החוקר את תורת המשחקים, אני נאלץ לחלוק על חלקים מדברייך, ויש כאן הזדמנות מצוינת ללמוד על המשמעות של אסטרטגיות דומיננטיות, שיוויי משקל, pooling equilibrium, על off-path threats על cheap talk, ועל babbling equilibrium. בואו נתחיל! 1/
The draft of my first textbook, coauthored with
@noamnisan
, "Mathematical Logic through Python," which is forthcoming in
@CambridgeUP
, is online!
A new approach to teaching Logic to CS students, tailored to their unique intuitions and strengths!
1/6
Jewish students are being blocked from entering class and threatened, and the administration chooses to do nothing.
This is not Germany in the 1930s.
This is
@MIT
in 2023.
This is the reality that MIT President wants to hide. A letter from Israeli & Jewish MIT students:
To all students at MIT,
Today, Jewish and Israeli MIT students were physically prevented from attending class by a hostile group of pro-Hamas and anti-Israel MIT students that
Answers: 1987(!); Arrow, Aumann & Kurz (!); they referred to the "Halpern–Moses Paradox," which says that in realistic settings, new common knowledge NEVER arises. (WHAT??? Yes.) This paradox stood for four decades.
In a 🚨new paper🚨, Yoram Moses and I resolve this paradox.🧵1/
Some time ago, three prominent economists, two of whom are now Nobel laureates, wrote the words below.
#EconTwitter
, can you guess (1) when, (2) who, and/or (3) what the problem they refer to might be? Comment your guess below 👇👇👇 & come back in 24hrs for the answer.
===
They
If anyone tells you that the terrorist attacks against Israel should be viewed "in the context of a 75-year dispute," ask them: Is there a context that justifies kidnapping children, sick, and elderly? Is there a context that justifies raping women? Is there a context that
My family has been taken to Gaza.
We don't know their medical condition, we know that if my uncle isn't released soon he could die, he has a degenerative disease and needs treatment.
They are European citizens. I need anyone with any contacts to get in touch with me ASAP.
So you think you've seen the most extreme of how low the media would stoop to libel Israel? Think again. (Also, look at the face of the interviewee
@EylonALevy
as he realizes the magnitude of the maliciousness of the question he was just asked.)
Shame on you
@KayBurley
@SkyNews
!
So excited to give the semester's UEA Lecture at
@MITEcon
today! Econ theory and theoretical CS both use math to prove theorems, but the flavor of theorems/tools differs. We'll see how approaches/aesthetics/techniques originating in CS can yield economically meaningful insights.
Now is a good time to check in on your Israeli students/RAs/TAs (and on any others who might be affected). Please also remember that not everyone is able to "work as a distraction from the situation" (and that not being able to do this doesn't mean one can't excel in academia).
DSA SF apparently believes in the "right" to rape. The "right" to behead babies. The "right" to mutilate dead bodies and parade them. This week many antisemitic masks are coming off. The people & organizations who excuse Saturday's massacre will soon enough don their masks again.
Violent oppression inevitably produces resistance. Socialists support the Palestinian people’s, and all people’s, right to resist and fight for their own liberation. This weekend’s events are no different. Decolonization is the only path towards peace. (3/4)
@akbarpour_
I actually think it's their "outside market value in academia" (i.e., business schools). Going to industry has many other features that some probably find less attractive; this is not so much the case with going to business schools.
This is Kfir, 9 months old. Born in 2023, abducted by Hamas into Gaza in 2023. Kfir is one of the many children held hostage by Hamas for 10 days now. No one knows how Kfir is being treated. No one knows if Kfir has anyone next to him when he cries. No one knows if Kfir is still
They kidnap toddlers into Gaza as hostages. They shoot and kill ambulance drivers. They desecrate bodies and parade them. These are not freedom fighters. These are blood-thirsty murdering sadistic terrorists.
My
#1
feature request for
@overleaf
is actually a very easy one to implement: "find and replace only inside math mode." ($i$ that has to become $j$ inside all expressions because I changed my mind about notation in a long proof, I'm looking at you!) Who is with me on this?
Mathematical Logic through Python by
@YannaiGonch
and
@noamnisan
.
A unique approach to mathematical logic where students implement the underlying concepts and proofs in the Python programming language.
As a student I actively lobbied for our department's main seminar to be moved from 4-6 to 2-4 so that I & other students w/kids could catch the seminar (or at least its start) before having to head out to pick our kids up from daycare. On evenings and weekends, I'm a
#ParentFirst
Maybe it's just me, but I purposefully avoid faculty who tries to force onto students the mentality that academia is somehow different than an 8-5 job and that you have to sacrifice all of your free/sleeping time in order to be a good researcher.
Well,
@BBCNews
@BowenBBC
, will we hear an apology?
@UNRWA
@UN
@ICRC
, maybe we'll get a comment from you? I don't see how your people on the ground could not have known.
@WHO
, how about a condemnation of using a hospital for terrorism and kidnapping?
Unpopular opinion: this reads to me like "this year, we help the rat race start even earlier at the expense of childhoods, contribute to making good colleges even less accessible to students who don't have anyone in their circles to give them the 'right advice,' and in general
This year, we invite high school students to submit research papers on the topic of machine learning for social impact! See our call for high school research project submissions below.
This will be a fun semester!
(
@caseyfeigh
we don't know each other, but thought you may be pleased to know your tweet was the first example in a
@HarvardEcon
course on incentives. Given your niece's impressive game theory skills at 3y/o, I hope to see her in class in 1½ decades)
I love math, but framing non-mathy fields as "swapping icons in HTML" is IMHO detrimental in 2 ways:
1. Presents things such as human-computer interaction & large-scale software engineering/design as trivial.
2. Teaches students to think some fields are superior to others. 1/2
Excited to teach at the
@HebrewU
Economic Theory summer school, precisely ten years after I first participated as a student. Looking forward to meeting PhD students & postdocs in econ/CS/OR/related fields who are interested in the interface of econ theory and CS.
#EconTwitter
📢 Applications are now open for the Summer School in Economic Theory and Computer Science (Jerusalem, June 23-27)
General director: Eric Maskin
Organizers: Elchanan Ben-Porath,
@noamnisan
,
@MichalFeldman9
Find out more and apply:
@AcmSIGecom
@econD47
Hizballah fire at Israel from a school. Hamas fires from hospitals. Much of the danger to Palestinians is b/c their leaders use them as human shields. They know it deters Israel b/c while Hamas targets innocent Israelis, Israel goes above&beyond to not hurt innocent Palestinians.
Hezbollah has fired rockets from a high school in the village of Kfar Shuba, using the children inside as human shields in an attack on an IDF base on Mount Dov. A mosque is also in close proximity to the high school, hindering the IDF from neutralizing the Hezbollah fighters.
@Ilhan
I couldn't find any call by you for de-escalation between Iran and Israel from before Iran attacked. Are you only calling for de-escalation and ceasefires every time after Israel gets attacked, which effectively means all you're doing is calling for Israel to not defend itself?
Very proud of Michael Yin
@micholyin
, my first undergraduate thesis advisee, for winning a
@Harvard
Hoopes Prize (awarded for "outstanding scholarly research") for his thesis. It was a pleasure advising you, Michael! Well deserved!
*Facts*:
Israel vacated Gaza (uprooted every Israeli) in 2005. Gaza under totalitarian self rule since. Today, terrorists from Gaza infiltrated Israel's sovereign area (defined by UN/US/EU/PLO(!)). Their goal: murdering+taking Israeli *civilians* hostage. Iran+Hizballah cheering.
Israel withdrew from the Gaza Strip in 2005. It evacuated every Israeli settlement and repositioned to the international line. Hamas took the strip by force, built a sharia quasi-state, and has now launched a surprise attack aimed at murdering and taking as many Israeli civilians
It's not too late to check out "Market Design JMC Profiles 2024" collected by
@AssafRomm
@RanShorrer
& myself. Eleven Econ/CS/OR profiles beautifully showcasing the frontiers of market design:
#EconTwitter
PRIMA
@PrimaProgram
and
@HorizonEU
, you have a problem. The below email was sent by a French academic to an Israeli academic (with whose permission I'm sharing this), regarding a PRIMA application. Beyond the hypocrisy of asking to be funded by Israeli money (to my understanding,
"Columbia Social Workers 4 Rape, Mutilation, and Murder"
@Columbia
, something tells me that the screening for your Social Work program could use some refining.
Discussing Chandrasekher, Frick, Iijima, & Le Yaouanq in the econ theory reading group.
@ShengwuLi
referring to the set in the middle of the picture as "Math B B P". No prior knowledge required to attend the reading group, except for compiling LaTeX on demand in your mind.
To love something as much as economists love memorizing years in which papers were published in order to refer to concepts that no one named using an acronym.
Looking for a market designer this job market? (You should!) Don't miss "Market Design JMC Profiles 2022" collected by
@AssafRomm
@RanShorrer
& myself. Eleven Econ/CS/OR profiles beautifully showcasing the frontiers of market design:
#EconTwitter
#EconJMC
It's also very easy to make the extreme opposite unfair comparison: very abstract "out there" math vs potentially giving countless differently abled users access they never have before. If you must compare, do so within a field. Cross-field comparisons are mostly a bad idea. 2/2
Just heard from Sergiu Hart that David Schmeidler passed away last night. David made giant contributions to econ theory, from general equilibrium, through cooperative&noncooperative game theory, to decision theory,in particular under uncertainty. An immense loss. RIP
#EconTwitter
Last week, Barzilai hospital in Israel (which also treats Palestinian patients, by the way) was hit by Hamas rockets. (Yes, Hamas/Jihad terrorist rockets hit hospitals on both sides.) But I guess that your Twitter feed wasn't full of condemnations for that because ***checks notes
Congratulations to Harvard Econ for (obviously!) voting
@ShengwuLi
tenure. Coauthoring many papers & cocktails, it’s a special joy for me to celebrate our simultaneous promotions this week.
Also, let me reveal his magic secret to productivity: A staff & a thoughtful advisor!
Okay stop whatever you're doing. After meticulous training on thousands of GPUs, I have a perfect classifier for econ vs CS papers. Here we go:
if len(abstract) <= 150:
print("econ")
else:
print("CS")
Picking out decorations with
@EleeShimshoni
for our kid's birthday party. The seller told us the price of balloons doesn't include
#inflation
and that we have to pay for
#inflation
separately. Took me a moment to understand what he meant.
"URGENT PROOFS"! Spotted at the airport just now. What do you think makes a proof urgent? I hope these are P=NP & a solution to the multi-good monopolist problem, and it's urgent because the semester is about to start and syllabi need updating. What do you hope these proofs are?
Stephen Morris and I are hard at work organizing the 34th Stony Brook International Conference on Game Theory. The conference will be on all areas of game theory, including in particular work at the intersection of economics and computer science. Submit your papers by April 16!
📢The 34th Stony Brook International Conference on Game Theory will be held in person on JULY 24-28, 2023, following a workshop on Learning and Bounded Rationality on JULY 22-23, 2023.
Submission for the 2023 conference is now open until Apr.16, 2023:
@dandolfa
Neither did 9/11. What's your point? Which non-vacuum justifies rape in your mind? Kidnapping of children? Murdering elderly? Mutilating bodies? Handing out sweets to children to celebrate all of the above?
It's heartbreaking to think about all of the good the enormous amounts of international and NGO aid money could have done for the benefit of Gazans if only they were not funneled to terrorism infrastructure or embezzled by Hamas leaders. A true tragedy.
This is insane. Hamas built a whole underground tunnel system wide enough for cars to drive through, and we’ve got video of Yahya Sinwar’s brother cruising through a tunnel.
David C. Parkes will become the next dean of SEAS, effective October 15, 2023. Currently the George F. Colony Professor of Computer Science, Parkes leads research at the interface between economics and computer science. He joined SEAS in 2001.
Thank you for the suggestion,
@Google
flights! What would I have done without knowing about the flight from
@BostonLogan
to
@EWRairport
that has a stopover in
@Airport_FRA
and costs just more than x50 times more?
Compare this to anti-Israel demonstrations where there are chants of "hey hey, ho ho, the United States has got to go" alongside chants calling to "globalize the Intifada."
This is not the fight of Israel alone. Every other liberal democracy is next. You are next.
#HamasislSIS
When the Palestinian women and children whom Hamas uses as human shields try to get to safety, Hamas kills them. Hamas intentionally kills both Palestinian and Israeli civilians. Hamas is ISIS.
Breaking News: Just now,
#Hamas
snipers have reportedly killed dozens of children and women on the streets, targeting those attempting to travel from north to south
#Gaza
and those displaying white flags as a sign of peace. Similar acts have previously been attributed to
@Idaneretz
@Duduoppe
קודם כל, לגבי האם "דיווח אם אתה המסריח" (להלן ד"מ) זה אסטרטגיה דומיננטית: אסטרטגיה דומיננטית היא אסטרטגיה שהיא טובה ביותר בלי קשר לאסטרטגיה בה היריב משתמש. אתה בעצמך אמרת ש-ד"מ איננה אסטרטגיה מיטבית אל מול הטענה כי "המריח הוא המסריח" (להלן מ"מ), אז ד"מ איננה דומיננטית. 2/
הידעתם? אם רק ליברמן לא היה אומר שמותר להעלות מחירים, אף אחד לא היה עושה זאת. הרי ידוע שאף אחד לא משנה תמחור של מוצר בלי לקבל אישור מליברמן. ובכלל, זה לא שמחירים נקבעים ע"פ ביקוש והיצע או משהו. למה לעצור כאן? חבל שליברמן לא אמר שצריך להוריד מחירים—זה היה מטפל בהכול, כולל בדיור 🤦♂️
הסכר נפרץ. כולם מעלים מחירים כי ליברמן אמר שגם ככה "בכל העולם עולים המחירים", אז הכל מותר. שר האוצר ליברמן מתנער מאחריות, אך הציבור מבין מי אחראי לכישלון הזה.
1/2 The first thing I teach in the crypto part of my grad course, "ECON 2070: A Computer Science Toolbox for Modern Economic Theory" is that there's no privacy without randomness. I guess such a course wasn't offered wherever the EJMR admins went to grad school :)
1/10 Apparently, economists have had for years a popular anonymous forum with 4chan-like levels of toxicity. The forum's administrator who is (temporarily?) anonymous would have done well to take an introductory crypto class or simply learn the maxim "don't roll your own crypto"
Hi
#EconTwitter
! So great that many JMCs are sharing their JMPs online. And it's now easier than ever to keep track:
-Follow
@EconJMP
: bot that retweets tweets with
#EconJMP
or
#EconJMC
in them
-Follow
@EconTheoryJMP
: bot that retweets tweets with the above+
#Theory
in them
Enjoy!
How Memorial Day is observed in Israel—a 🧵.
Tomorrow will mark Israel's Memorial Day, which is commemorated in a starkly different way than in the US. Israel has had mandatory conscription since its founding in 1948 to this day. For that reason, you'd be hard pressed to 1/5
Honored to receive the inaugural
@INFORMS
AMD Rothkopf Junior Researcher Paper Prize, for "best paper by a young researcher in Auctions&Market Design, with a particular focus on the use of Operations Research/Management Science techniques in the design or analysis of markets" 1/2
Please take three minutes to listen to
#Arab
-Israeli journalist
@lucyaharish
. The terrorist attack of Hamas was against the innocent citizens of the sovereign state of Israel: Jews, Christians, Druze, Muslims, and others.
#HAMASisISIS
#HamasISIS
“We are fighting for our lives, for our future, and mostly for the future of our children.”
Arab-Israeli TV anchor
@lucyaharish
interrupted rolling coverage of Hamas’s atrocities against Israelis to make this heartrending appeal to the world.
Please listen and share.
@mdjcole
@ben_golub
I call bullshit. I worked for Google from 2007-2013. Getting accepted there as a software engineer was much harder then than it is today, so that probably puts me above average in SWE skills. It took me a lot of time after that to start to understand how to be a social scientist.
Hot take from some faculty at
@Columbia
: if instead of "victim blaming" you call it "recontextualizing rape," then apparently it's suddenly ok. Some people do not deserve the honor of shaping young people's minds.
Columbia/Barnard faculty have signed an open letter supporting our students, making the point that identifying with the suffering of Gazans and historically contextualizing the current war in Israel/Gaza is not anti-Semitic. Please read and share.
Published! Our book (bottom center) now exists in physical form and is no longer "forthcoming"! Order rather than preorder! So exciting!
*In the UK. US release will be in a couple of months.
@noamnisan
#logicthrupython
1/2
@Idaneretz
@Duduoppe
שים לב ש"המריח הוא המסריח" הוא האיום ששומר על שיווי המשקל, אבל שאנו לא מצפים להתקל בו לעולם. למה אנחנו נתקלים בו למרות זאת? יתכן שכשילדים משחקים את המשחק הזה לראשונה, הם לא מבינים לחלוטין מהו ש"מ, ומטרת הביטוי "המריח הוא המסריח" ללמד אותם ששתיקה היא שיווי משקל. תודה שקראתם. 14/14
Each freed hostage is a celebration. Had Israel heeded a few weeks ago the call for ceasefire by
@SenWarren
& other well-intentioned yet naïve westsplainers, we would not have seen any hostages return today. We need to continue to ensure all the hostages are freed, no exceptions.
@Idaneretz
@Duduoppe
עכשיו לגבי הטענה שלשחק ד"מ זה שיווי משקל (ש-מ"מ בא להיאבק בו)---בוא נזהר קצת יותר ונגדיר באופן יותר מדוייק מה זה אומר שהמטרה של כל שחקן היא שיחשדו בו כמה שפחות. לצורך הפשטות, נגיד שיש שלושה "חשודים" (שאחד מהם המסריח) שעומדים יחדיו, ועוד מישהו שצופה בהם (ובוודאות איננו המסריח). 3/
For players A&B from above, according to our definition there's common knowledge of the arrival (& content) of the message between A *as she sends the message* and B *as the message arrives*. For details, pls check out our paper!
Thanks for reading. 11/11
Flying out to teach at the MSRI
@mathmoves
summer school on Mathematics and Computer Science of Market and Mechanism Design. I hope that the Italian Gelato place (Almare) at Berkeley will honor my stamp card from 2015!
Following up on previous years' compilations of Market Design job-market profiles,
@AssafRomm
@RanShorrer
and I are compiling an edition for this job market.
Last year, in early October, we sent out a call to job market candidates to submit their profiles to our annual list,
Describing Hillel as first and foremost "Zionist" again shows that these demonstrators use "Zionist" as a synonym for "Jewish" to thinly masquerade their antisemitism. This usage has a long history originating (at least) in the Soviet Union, of which these antisemites are fans.
NEW: To celebrate Northwestern’s Admitted Students Day, anti-Israel protesters shouted at incoming students and passed out flyers accusing NU of “funneling Jewish students into Hillel, the Zionist ‘foundation for Jewish life.’”
“Sometimes I wonder what it would’ve been like to
Outline slide!!! So you're saying you'll first define some stuff, then prove some stuff, and then, despite what you say you'll prove (but haven't yet), you'll show that what you defined satisfies <term you haven't defined yet>? How informative! Can I pls get these 2mins back? 1/3