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Hey #EconTwitter, I'm on the job market with a paper about open source software. OSS is a global public good, widely used and provided by the private sector, but the target of recent industrial policy. Paper: jeffgortmaker.com/files/Open_Sou… 1/
Excited to teach this workshop! It combines what I've learned from teaching demand estimation and Python to doctoral students, fielding PyBLP questions from users in academia/government/industry, and my own research with @conlon_chris. Check it out: mixtapesessions.io/session/demand…
Excited to teach this workshop! It combines what I've learned from teaching demand estimation and Python to doctoral students, fielding PyBLP questions from users in academia/government/industry, and my own research with @conlon_chris. Check it out: mixtapesessions.io/session/demand…
@Spacehuskyx @florianederer Of course! Quick summary: Markups are (roughly) how much retailers charge above cost. If a retailer buys a pack of Oreos for $1 and sells it for $1.25, that's a 25% markup. There's a large body of evidence that markups (in retail and beyond) have been rising for several decades
Three graphs on why rising costs create disproportionate inflation for low-income households (many thanks @BaldwinRE and @voxeu for covering!)
Three graphs on why rising costs create disproportionate inflation for low-income households (many thanks @BaldwinRE and @voxeu for covering!)
Updated version of our "micro BLP" paper! My earlier thread () summarizes some of the key points.
That’s a wrap on BOMSI ‘23, the Behavioral Operations Management Summer Institute for doctoral students at @HarvardHBS. Steve Leider and Jordan Tong are the best co-conspirators imaginable, and the future of our field is bright! @INFORMS @PomsSociety #bom
@nummoose and my recent analysis on market reactions to Fed press conferences in the @WSJ ! Let's see if Chair Powell bucks the trend today :) wsj.com/livecoverage/f…
Where should I look for survey data on perceptions of crime in the US? I'm interested in questions like "is crime getting worse in your community?" and want it going back as far as possible—since 1945 ideally!
An important initiative by Tatiana that helps aspiring econ PhD students with some crowdsourced advice on grad school. Any voluntary donations from purchasing this e-book will support the victims of the war. @TDeryugina thank you for your work on this! Grateful to contribute.
Come work with me! I'm hiring a full-time pre-doc for summer 2023. We'll work together on projects studying the criminal justice system. Time will be split with Jamie McCasland, who has some exciting projects in development and PE. Details: economics.ubc.ca/research/resea… @econ_ra
How will markets react to the FOMC conference tmrw? While the Chair’s press conference typically reinforces the market’s read of the FOMC statement, @nummoose and I find a break in the pattern recently: Chair Powell’s latest conferences tend to go the other way. 1/ #econtwitter
Despite the promise of #AI to transform work, why do so many companies struggle to actually adopt AI in practice? In a new @HarvardBiz article, Rebecca Karp and I show the importance of strategic pacing and give practical steps for successful AI rollouts: hbr.org/2022/08/find-t…
Hey #econtwitter, @conlon_chris and I just released version 0.13.0 of PyBLP, our Python package for BLP-style differentiated products demand estimation. Code: github.com/jeffgortmaker/… Docs: pyblp.readthedocs.io/en/stable/ Paper: jeffgortmaker.com/files/pyblp.pdf What's new? 1/9
Improving productivity through better management practices buff.ly/3G0EFQK My Impact Case Study with @raffasadun @I_Am_NickBloom on our WMS work buff.ly/3tbb9jy @POID_LSE
I have been teaching geometry and made a million figures in TikZ. My lecture slides are basically a "proofs without words"-style intro to Euclidean, spherical, hyperbolic, affine, and projective geometries: intellectualmathematics.com/geometry/
Hello #EconTwitter! I'm looking for a research assistant in empirical economics on spatial topics starting summer 2022. More info and application: jordanjnorris.com/job-postings Thank you!
I’ve finally finished the first draft of the chapter on DID estimators, including all the recent developments around staggered DID designs, for my online book « Statistical Tools of Causal Inference »: chabefer.github.io/STCI/NE.html#d… A thread on what’s inside 👇🧵
Introducing stata2r.github.io w @nickchk and @grant_mcdermott Hopefully makes the Stata -> R pipeline much easier. - data-wrangling with {data.table} - regression analysis with {fixest} These packages are blazingly fast 🏃🏻💨, highly powerful 💪🏻😎, and flexible 👌✨
Opinionated Latex table tip: You should output only the body of the table in R/Stata and do everything else in latex. This makes it simple to set up multicols, alignment, footnotes, etc. without trying to learn all the stata/R options.

Tinglong Dai @TinglongDai
2K Followers 2K Following Ferrari Professor of Business @JohnsHopkins @JHUCarey @JHU_HBHI @HopkinsDSAI @JHUNursing @IDIESJHU; VP @INFORMS ✍🏻 AI, Supply Chains, & Healthcare
Adam Elmachtoub @Adam235711
3K Followers 3K Following Associate Professor of Industrial Engineering and Operations Research @Columbia @CUSEAS @DataSciColumbia / @AmazonScience Visiting Academic
Kayse Lee Maass, PhD @KayseMaass
2K Followers 2K Following @Northeastern Industrial Eng Asst. Professor using #ORMS to address #Healthcare, #SocialJustice, #Access, & #HumanTrafficking | Director of @ORSJ_lab | she/her
kamalini ramdas @ramdask
794 Followers 570 Following Deloitte Chair in Innovation & Entrepreneurship, Professor of Management Science & Operations, London Business School
Elias Khalil @lyeskhalil
2K Followers 2K Following Assistant Professor @UofT & @uoftmie. Formerly postdoc @DS4DM in Montreal and grad student @gtcomputing & @GTCSE. Machine Learning+Discrete Optimization.
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INFORMS @INFORMS
13K Followers 2K Following INFORMS is the association for those who apply science, math, technology, and analytics to solve the world’s most critical challenges.
Deniz Besik, PhD @denizbesik
1K Followers 2K Following Assistant Professor of Analytics and Operations @urichmond. Research expertise: supply chain management. she/her
Gábor Békés @GaborBekes
4K Followers 4K Following @GaborBekes at Bluesky. Associate Professor of Economics, @ceu Vienna. Author: Data Analysis (Cambridge UP) https://t.co/GhnZMAA6Rd @Gabors_Data
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SarahWatt @L3e4Q3DmsY17al
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PearlRobbins @375JV4SwNZAqG
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コットンキャン... @Tebee3392
6 Followers 429 Following "Life is unpredictable, but good medicine and a compassionate heart never fail."
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チェリーの夢 @Whoartu6990057
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Alexandra @Iternox6611
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Paul Burke, PhD @drpaulburke
4K Followers 5K Following Marketing Professor ▪ Researching choices to improve our future ▪ #bus #edu #consumer ▪ academic @ University of Technology Sydney (UTS)
Ljubica (LJ) Ristovsk... @lj_ristovska
943 Followers 608 Following Econ AP at @theLBJSchool at @UTAustin. PhD @HarvardEcon '23. @Wellesley ‘13. Bright and patterned skirt-wearer.
Chenghuai Li @Chenghuai_Li
92 Followers 229 Following Ph.D. student in Operations Management @DukeFuqua @DukeU
James Traina @EconTraina
2K Followers 766 Following Sr Research Scientist @NYUStern | AP of Finance @NYUAbuDhabi (On Leave) | PhD @ChicagoBooth & @UChi_Economics | Markups, Productivity, Investment, Technology
Angel T-H Chung @AngelTHChung
38 Followers 149 Following PhD student @Wharton @Penn | formerly @PennGSE | Interested in equitable AI & ML for health, edu, social good | 🎺🎵⚾️🏓️
Timothy Layton @timothyjlayton
3K Followers 678 Following E-cargo bike Dad, avid run-commuter. Assoc Prof of Pub Pol and Econ @UVABatten, @nberpubs RA, and @JPAL. Via @HMSHCP @bu_economics and @BYUecon.
RenataO'Connor @ET6feWTx81E2Fe
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see-ROTCH-ah @seerotchah
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Thero @TheroDg6N2v8
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Hamid Arzani @HamidArzani
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a&*QF@7t!4u@V @S3eee29Oys13mK6
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59 Followers 6K Following
Camilla Schneier @camillaschneier
410 Followers 1K Following Postdoc @miurbanchicago, next AP @BUQuestrom. Industrial organization, urban economics. https://t.co/zgSUHgsSP9
. @Xmash_it
67 Followers 4K Following
Deivy Houeix @DeivyHoueix
2K Followers 1K Following Prize Fellow @Harvard @HistoryEcon Incoming Assistant Prof of Economics @Columbia_biz in 2027 PhD @MITecon he/him https://t.co/LNo7Bb7Dsb
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Rhett @miyashiget53041
82 Followers 7K Following
Detho @Detho1Dq8uhz
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Terrill Li @LiTerrill14260
1 Followers 242 Following
Shixiang (Woody) Zhu @woodyszhu
249 Followers 739 Following Assistant Professor @HeinzCollege @CarnegieMellon. Previously ML PhD @GeorgiaTechISyE @GeorgiaTech @mlatgt. Work on Machine Learning and Operations Research.
McThethe @McThetheXYx
49 Followers 5K Following
Jason Abrevaya @JAbrevaya
514 Followers 378 Following Professor, @UTAustinEcon. Author of intro probstats book (https://t.co/XyyWQeiu0Z).
PaulaChaplin @uLFJA7UqZ31sUoP
79 Followers 7K Following
Noslu @noslu10229
75 Followers 5K Following
Jenny Wang @jennyshwang
216 Followers 370 Following PhD Student @HarvardHBS | NSF GRFP fellow | former @MSFTResearch computational social science predoc
Emma Dumont @yg9vB88Q4wNseSA
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TabithaRudolph @Uo1Epnmx4Q788X
81 Followers 7K Following
Emma_ @Emma18757516474
77 Followers 5K Following
Michał Zator @ZatorMichal
289 Followers 148 Following Assistant Professor of Finance, University of Notre Dame 🇵🇱 🇺🇸 Ekonomia, system finansowy, rynek pracy
Rob Bray @roblbray
11 Followers 7 Following
C_inema @InemaC21190
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kim Castro mei @kim989kim
1K Followers 7K Following simple life , No act of kindness, No matter how small, Is ever wasted..
Gift-Brave @47T4ArigTb1iC
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Ruth @ruthkonowal97
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Kyla @kurokomiki96965
73 Followers 7K Following
Peter Hull @instrumenthull
51K Followers 3K Following Professor @Brown_Economics, studying econometrics, discrimination, education, and healthcare. Editor @AEAjournals, affiliate @nberpubs, scholar @amazon
Tinglong Dai @TinglongDai
2K Followers 2K Following Ferrari Professor of Business @JohnsHopkins @JHUCarey @JHU_HBHI @HopkinsDSAI @JHUNursing @IDIESJHU; VP @INFORMS ✍🏻 AI, Supply Chains, & Healthcare
Wojtek Kopczuk 🇵�... @wwwojtekk
54K Followers 1K Following Economist, tax policy/inequality. Editor of @JPubEcon. Professional skeptic. Anti-illiberal.
Adam Elmachtoub @Adam235711
3K Followers 3K Following Associate Professor of Industrial Engineering and Operations Research @Columbia @CUSEAS @DataSciColumbia / @AmazonScience Visiting Academic
Ethan Mollick @emollick
288K Followers 576 Following Professor @Wharton studying AI, innovation & startups. Democratizing education using tech Book: https://t.co/CSmipbJ2jV Substack: https://t.co/UIBhxu4bgq
QJE @QJEHarvard
54K Followers 2 Following The Quarterly Journal of Economics is the oldest professional journal of Economics in the English language. Edited by the Department of Economics at Harvard.
Shengwu Li @ShengwuLi
37K Followers 721 Following Economist. @Harvard. Mechanism design, behavioral theory.
C. Kirabo Jackson @KiraboJackson
17K Followers 1K Following Economist at @sesp_nu, @NorthwesternU Editor-in-chief @AEAjournals PERSONAL ACCOUNT
alz @alz_zyd_
30K Followers 16K Following pfp by @ShizzyAizawa. Inventor of the John Von Neumann hypothesis for LLM scaling limits
Hanno Lustig @HannoLustig
44K Followers 1K Following Economist at Stanford. Fascinated by exchange rates. Really wanted to be a pilot. Actually, taxes do fund spending.
Jeffrey Wooldridge @jmwooldridge
88K Followers 1K Following University Distinguished Professor of Economics, Michigan State University. Econometrician and textbook author. Two dogs, one rabbit, two fish, and N + 2 cats.
Kayse Lee Maass, PhD @KayseMaass
2K Followers 2K Following @Northeastern Industrial Eng Asst. Professor using #ORMS to address #Healthcare, #SocialJustice, #Access, & #HumanTrafficking | Director of @ORSJ_lab | she/her
Stefanie Stantcheva @S_Stantcheva
42K Followers 2K Following Professor of Economics @Harvard. Inequality, taxation, innovation & how people understand economic policies. Theory+data. https://t.co/naCOmtlUCe
kamalini ramdas @ramdask
794 Followers 570 Following Deloitte Chair in Innovation & Entrepreneurship, Professor of Management Science & Operations, London Business School
Elias Khalil @lyeskhalil
2K Followers 2K Following Assistant Professor @UofT & @uoftmie. Formerly postdoc @DS4DM in Montreal and grad student @gtcomputing & @GTCSE. Machine Learning+Discrete Optimization.
NBER @nberpubs
171K Followers 243 Following The National Bureau of Economic Research is dedicated to conducting and disseminating nonpartisan economic research.
Pedro H. C. Sant'Anna @pedrohcgs
26K Followers 2K Following Associate Professor @EmoryEconomics | Econometrics | Causal Inference | Difference-in-Differences. Dad 5x
Joseph Steinberg @jbsteinberg
4K Followers 199 Following Professor @econuoft. Research Associate @nberpubs. PhD from @umn_econ. Macro, international, public finance. Views my own.
Mike Bird @Birdyword
98K Followers 2K Following Wall Street editor @TheEconomist. Money Talks pod co-host, Buttonwood column co-author. Just a lad from Leeds with a lust for markets, economics and history.
Doug Campbell @TradeandMoney
23K Followers 20K Following I trade props for a living. Academic economist on the side; UC Davis PhD. Replication. Insight Prediction founder.
Aaron Sojourner @aaronsojourner
14K Followers 3K Following #Labor #economics on Bluesky. https://t.co/2CfWIGmXKF
Secretary Marco Rubio @SecRubio
1.5M Followers 9 Following 72nd Secretary of State serving under the leadership of @POTUS Trump.
LinkedIn Lunatics @LinkedInLunat1c
125K Followers 36 Following Sharing the cringe that is LinkedIn | Follow @jovvvian THE LinkedIn Lunatic | post unhinged memes on LinkedIn and go viral https://t.co/z7o93BEBb0
Ljubica (LJ) Ristovsk... @lj_ristovska
943 Followers 608 Following Econ AP at @theLBJSchool at @UTAustin. PhD @HarvardEcon '23. @Wellesley ‘13. Bright and patterned skirt-wearer.
Collin Rugg @CollinRugg
1.9M Followers 708 Following Co-Owner of Trending Politics | Investor | American 🇺🇸
Pay Roll Manager Here @UsingLyft
28K Followers 806 Following Leading Black Researcher In Race & IQ, Landlord, I Get Computers Putin, Hate Crypto, PhD In Af American Studies. Pop Smoke is Top 5 DOA #StopNiggaOnBlackCrime
Victoria Marone @VictoriaMarone_
1K Followers 2K Following Economist @YaleEconomics studying the organization and design of health insurance and healthcare markets.
Claire Shi @clairewhoisshi
133 Followers 158 Following Econ PhD student @HarvardHBS, Harvard College '21 NZD 🇳🇿 | SYD 🇦🇺 | BOS 🇺🇸
ثنا ابراهیم... @__Injaneb96
127K Followers 780 Following A PhD candidate passionate about politics. A retweet is not an endorsement. Opinions are mine.
Angel T-H Chung @AngelTHChung
38 Followers 149 Following PhD student @Wharton @Penn | formerly @PennGSE | Interested in equitable AI & ML for health, edu, social good | 🎺🎵⚾️🏓️
Timothy Layton @timothyjlayton
3K Followers 678 Following E-cargo bike Dad, avid run-commuter. Assoc Prof of Pub Pol and Econ @UVABatten, @nberpubs RA, and @JPAL. Via @HMSHCP @bu_economics and @BYUecon.
Dr. Scott Barry Kaufm... @sbkaufman
110K Followers 5K Following Professor at Columbia & Bestselling Author | Center for Human Potential | The Psychology Podcast | Latest Book: Rise Above | #comedy #neurodiversity #growth
Greentext Poster @GreenTextRepost
579K Followers 275 Following Posting the best 4chan greentexts. (Just cause it’s posted doesn’t mean it’s endorsed) (personal @mrprepost )
anabology @anabology
57K Followers 586 Following https://t.co/pZ6aCj2CqO // https://t.co/zqSsOEl9Hd = open protocols, https://t.co/y2cZlyPqix = recommended reading, https://t.co/Or0qh3728H = podcast (Listen on... → all platforms)
Coddled Affluent Prof... @feelsdesperate
61K Followers 5K Following Retired Internet personality. 🚨 🚨 🚨 Find me at https://t.co/JkqmiUUmGW 🚨 🚨 🚨
Dylan O'Sullivan @DylanoA4
118K Followers 559 Following “All is built on sand, but we must build as if the sand were stone.” Working on books @InfiniteB88ks. Working on writing @Essayful. Bylines @TheSpectator, etc.
Camilla Schneier @camillaschneier
410 Followers 1K Following Postdoc @miurbanchicago, next AP @BUQuestrom. Industrial organization, urban economics. https://t.co/zgSUHgsSP9
Anthony DiGiorgio, DO... @DrDiGiorgio
11K Followers 3K Following Neurosurgeon and Health Policy Wonk. Views my own. Traumatic Brain Injury | Spinal Cord Injury | Medicaid Policy
Reddit Lies @reddit_lies
520K Followers 1K Following Misinformation is the bread and butter of the “free thinking high IQ” denizens of Reddit. Ephesians 5:11. DMs open for submissions.
Niels Hoven 🐮 @NielsHoven
26K Followers 2K Following Founded @MentavaInc to teach reading in preschool and calculus in middle school. Help me bring back excellence in education. Father of 4.
Martha Fiehn @MarthaF_F
3K Followers 1K Following PhD student @UCSDEcon. Prev. RA @HarvardLaw, @HarvardEcon, @YaleEconomics, econ @UCBerkeley and int'l econ policy @sciencespo. Tax, labor, law. Berlin + CA
Sohail Ahmed @SohailSNAhmed
32K Followers 2K Following Head of Insights for Islamist Extremism at @ResilienceUnity | Counter-Extremism | Biomedical Science & Mathematics | Member: @LibDems | Views strictly my own
Jason Abrevaya @JAbrevaya
514 Followers 378 Following Professor, @UTAustinEcon. Author of intro probstats book (https://t.co/XyyWQeiu0Z).
Christopher Phelan @ChrisPhelanEcon
1K Followers 444 Following Professor. Economics. University of Minnesota. Online Safety and Disinformation Expert.
Jenny Wang @jennyshwang
216 Followers 370 Following PhD Student @HarvardHBS | NSF GRFP fellow | former @MSFTResearch computational social science predoc
Damn Nature You Scary @AmazingSights
1.1M Followers 17 Following Taking a look at some of the most insane animal encounters Clips caught on camera.
Steve McGuire @sfmcguire79
40K Followers 2K Following Paul & Karen Levy Fellow in Campus Freedom @goACTA. Writings in @WSJ, @nypost, @Newsweek, @FoxNews, @RCPolitics, etc. Opinions are my own. RT ≠ endorsement.
Michał Zator @ZatorMichal
289 Followers 148 Following Assistant Professor of Finance, University of Notre Dame 🇵🇱 🇺🇸 Ekonomia, system finansowy, rynek pracy
Rob Bray @roblbray
11 Followers 7 Following
M&SOM Outreach @msom_outreach
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Fedor Holz 🐧 @CrownUpGuy
78K Followers 588 Following #1 Poker Player ‘16. Founder & Coach @_pokercode | @ggpoker ambassador | 🐧
Steve Inman @SteveInmanUIC
3.0M Followers 3K Following MMA/Sports commentator. Narrating random videos from around the world. Backup page @SteveInmanClips 🇺🇸 #FAFO Videos
Hadas Weiss @weiss_hadas
12K Followers 8K Following "I used to be just like you before I started going to therapy"
Yu Ma @yuma_or
54 Followers 225 Following Assistant Prof @UWBusiness Integrated AI, Healthcare, Analytics Alma mater @MIT, @UCBerkeley.
Ash Paul @pash22
32K Followers 35K Following Public Hlth Dr,interested in evid-based health services commissioning,clinical leadership & hlth policy.My views are my own,RTs are no endorsements
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462 Followers 598 Following 👨🎓 Asst. Prof @UW Foster Business School | PhD in OR @MIT 🏞👨💻 AI | OR | Sustainability | Healthcare 🦅 Naturalist, wildlife photographer, AI artist
Imtiaz Mahmood @ImtiazMadmood
412K Followers 28K Following Atheist, freethinker; exposing Islam layer by layer, to let infidels know more about Islam than Muslims allow them to. "Am Yisrael Chai"
Texas Mike @TexasMike2014
5K Followers 149 Following Recreational poker player. 2x WSOP Bracelet Winner. UT Grad/Loyola MBA. Packaging Industry. ❤️ 4x too big #AllGasNoBrakes
Roaring Kitty @TheRoaringKitty
1.7M Followers 90 Following
UT-Austin Economics @UTAustinEcon
1K Followers 293 Following The official twitter feed for the Department of Economics at the University of Texas at Austin.