David Holtz
@daveholtz
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assistant professor at @ucberkeley
Oakland, CA and Brooklyn, NY
Joined December 2010
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Last Seen Profiles
Pinned Tweet
🚨 Announcing a new working paper measuring the causal impact of generative AI on business performance in emerging markets!
This is joint work w/
@nickgotis
(who led the project)
@RowanPClarke
@solenedelecourt
+
@orgRem
.
More on our results below 👇 1/
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tfw you arrive at your
@airbnb
and realize that the whole space is essentially just a large-ish bathroom that the host put a bed into
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@AirbnbHelp
i already spoke to customer support multiple times and every customer support advocate i've interacted with has had no interest in helping resolve the issue. can i expect a different outcome this time?
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after sleeping for 2 nights one foot away from a toilet, i’m ready to sleep for 26 nights in the jungles of fiji
@JeffProbst
@survivorcbs
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@safara_travels
@Airbnb
i’m all set for tonight but happy to try out
@safara_travels
next time I go somewhere if the offer still stands :)
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a few different news outlets have reached out to me for further details or to request an interview. this is all i have to say on the matter at this time - thanks! cc:
@JeffProbst
@survivorcbs
@JesseTannenbaum
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you wouldn’t know it from the fact that I booked this Airbnb but I am cunning enough to outwit outplay and outlast
@JeffProbst
@survivorcbs
@JesseTannenbaum
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🧵Tomorrow is the first day of a new MBA class I'm teaching at
@BerkeleyHaas
, "Online Marketplace and Platform Design."
Interest is high! Despite being a new class taught by a new prof, the class is ~full. I wanted to share the reading list in case it is of interest to others:
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🚨 New research just published in
@NatureHumBehav
: We analyzed the collaboration patterns of 61k+
@Microsoft
employees to estimate the causal effects of firm-wide remote work (RW).
1/
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if I can do this I can definitely get people to split a vote to flush an idol ;)
@JeffProbst
@survivorcbs
@JesseTannenbaum
@daveholtz
@JeffProbst
@survivorcbs
@JesseTannenbaum
@UCBerkeley
lol - you're getting national hotel chains to endorse your survivor application/write-in compaign because you're dragging their competition on twitter
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whew, this got written up in
@Independent
?! not true that I declined to comment though…
@JeffProbst
@survivorcbs
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i have been informed that i am now a doctor.
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nobody told me this was an option when i agreed to be the faculty advisor for one of the undergrad data science clubs…
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evidence that academic knowledge does not always translate to real world execution lol
This Airbnb experience is even funnier when you click on the author bio and realize that he's a leading academic expert on negative AirBnb reviews.
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@hollyherndon
And academic research shows the financial returns to being on one of these playlists are significant 😞
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Honored to have been awarded the WITS 2020 Best Dissertation Proposal Award for my dissertation, “Essays on the Design of Online Marketplaces and Platforms!” Thanks to my committee,
@sinanaral
@deaneckles
and
@johnjhorton
for their mentorship & to
@MITSloanPhD
for great support!
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Truly honored to win the INFORMS ISS best dissertation award this year! Big thanks to my advisor,
@sinanaral
, as well as
@deaneckles
,
@johnjhorton
,
@ssuri
,
@AndreyFradkin
, and everyone else who has mentored, supported, and worked with me throughout the years.
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🚨 My paper with
@AndreyFradkin
that evaluates the impact of Airbnb's incentivized review program on market outcomes is now published in
@Mrktng_Science
!
Short thread on the paper below 👇
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Twitter’s “For You” absolutely KILLING IT with state of the art personalization.
@elonmusk
has done it again.
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Every time I've tried to collaborate with people at other universities, it becomes a huge mess because of IRBs/DUAs...which is crazy to me, because there are so many papers that are co-authored across multiple institutions!
Is there some secret trick here that I'm unaware of?
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Very excited by this recent paper by Naoki Egami and coauthors, which looks at how social scientists can conduct unbiased statistical inference when using LLM-generated annotations in their analyses:
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I'm very excited that my paper w/
@FelipeLobel
@rubenlobel
@inessaliskovich
and
@sinanaral
"Reducing Interference Bias in Online Marketplace Experiments Using Cluster Randomization" is now published in
@INFORMS
Management Science and available online:
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We ran a 5-month long RCT in Kenya with 640 Kenyan entrepreneurs, over 4,000 measures of firm performance, and thousands of interactions w/ a generative AI mentor that we built using GPT-4. Participants interacted w/ the mentor through WhatsApp. Example interaction shown here. 2/
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people often ask me about collaborating with companies on research.
the most importance advice i give is to make sure before starting any project that you have a signed data usage agreement that guarantees the right to publish your findings.
if you can’t get that, walk away.
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The “the warrantee on your car is about to expire” people have pivoted to “hello it is me your phd advisor”
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🚨 Excited to share this working paper w/
@BenCarterette
,
@pchandarr
,
@ZahraNazari1
,
@hsmcramer
, &
@sinanaral
, studying the effect of a algo recs optimized solely for engagement on consumption diversity.
SSRN:
Dropbox:
Thread 👇
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one of my life dreams for awhile has been to be the subject of one of these ridiculous
@nypost
stories and…I did it.
My shocking Airbnb rental was a bathroom with a bed in it: ‘Airbnpee!’
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Mission accomplished! This evening I wrapped up the first ever semester of “Online Marketplace and Platform Design” at
@BerkeleyHaas
.
Many thanks to my amazing students (some of whom are not pictured below due to the atrocious weather in the bay today) for an amazing semester!
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I'm very grateful for this amazing piece that was written about the online marketplaces and platforms MBA course that I teach at
@BerkeleyHaas
!
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Cool fun fact I learned today: bluetooth is named after the Danish king Harald "Bluetooth" Gormsson, who united Denmark and Norway in 958. The bluetooth symbol we all know and love (shown below) is a bind-rune of the initials for Harald Bluetooth!
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my name is nathan fielder, and i graduated from one of canada's top business schools with really good grades
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Very excited to have received an "Accelerating Foundation Models Research" research grant from
@Microsoft
to support some ongoing research looking at how folks interact with and learn how to more effectively use generative AI tools
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leave it to economists to argue about the signaling value of personalized cover letters during the first job market cycle that candidates can write a for loop that generates hundreds of personalized cover letters in the time that it takes to brew a cup of coffee
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Exciting news - we’re now accepting submissions for this year’s
@CODEConference
! Abstracts due Sep 9, the conference itself is Oct 20-21. CFP below.
I’m once again chairing the conference’s technical program committee, so please reach out if you have any Qs about submitting!
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This is great advice. Something I would add for those hoping to get into data science: focus on learning about experimentation and causal inference, rather than learning about machine learning and prediction.
New blog post: For the past couple years, I've been telling people who ask me for advice not to go into data science. Here's why: The data science job market is way oversaturated. Here's what they should do instead.
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My fantastic group at
@berkeleyhaas
is hiring two professors this year, one in micro and one in macro. The job posting can be found below, and applications are due on September 1. Please reach out if you have any questions or would like to learn more!
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Very excited about the rockstar lineup we’ve put together for
@CODEConference
this year!
Since the conference is in two weeks, I figured I’d briefly let people know what is on the program in case you’re on the fence about attending (hint: you should attend).
More info below 👇
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your scientists were so preoccupied with whether or not they could, they didn’t stop to think if they should.
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Very surreal to pick up the phone and hear the words: “Hello, Professor Holtz? This is the BBC.”
I had the great pleasure of discussing our new research on remote work with
@bbcjamiecoo
for
@bbcnewshour
earlier today. Hear the full conversation here:
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🚨 New working paper w/
@rubenlobel
,
@inessaliskovich
, &
@sinanaral
, which uses meta-experiments to study how & to what extent experiment design can reduce bias in online marketplace TATE estimates.
SSRN:
Dropbox:
Thread 👇
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Is there a German word for the fear that you may tweet all of your life's best tweets while you still don't have many followers?
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Honored and delighted to have received a 2023 Management Science Distinguished Service Award in recognition of my efforts as a reviewer over the past year!
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referencing
@Andrew___Baker
's new working paper on staggered DiD in writing and trying to figure out if i should give it a proper citation or just refer to it as "the feet paper"
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🚨 Excited to share a new working paper w/
@sinanaral
, which uses a simulation-based approach to understand how methods from the networks literature can reduce bias in online marketplace experiments.
SSRN:
Dropbox:
Thread 👇
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🎉 just submitted a paper to a journal, which on the grad school scale feels like a big accomplishment 🎉
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serious tweet: very grateful to have a fantastic advisor (
@sinanaral
) and dissertation committee (
@deaneckles
@johnjhorton
). these guys have all been amazing mentors, collaborators, and friends over the past six years.
also...
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Definitely hitting the COVID wall that many other folks have been tweeting about and discussing this week — I’ve been so down and unproductive. I can’t believe we’ve all been doing this for nearly a year. At least the end is (hopefully) in sight? 🤞🤞🤞
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Very excited for this spring's
@mit_ide
virtual seminar series, where we'll host
@jugander
,
@timhwang
, DJ Wu,
@shawndrahill
,
@cuysheffield
,
@ssuri
, Michael Schrage,
@florentaT
,
@sebbie88
,
@JADHazell
,
@marketsensei
+
@sophcalderwang
! Sign up here:
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Session
#1
of Online Marketplace and Platform Design at
@BerkeleyHaas
was a hit!
Thanks to
@rn28162
for an awesome guest lecture discussing the early days of
@Airbnb
and how
@wavecapitalvc
thinks about marketplaces (and for not sharing embarrassing stories about 24 yr old me)
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Our paper studying a change to Airbnb’s reputation system is now online at Marketing Science! This paper has seen gone through many iterations over the year’s — see
@AndreyFradkin
’s thread for a good discussion of what’s new.
Full paper here:
Our paper on reciprocity and unveiling in Airbnb's reputation system is now online at Marketing Science. The paper has changed a lot over time, so I'd like to highlight some newer findings and provide thoughts on the value of this research style. w/
@daveholtz
@elenatej
1/
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Excited and honored that my paper w/
@AndreyFradkin
, “Do Incentives to Review Help the Market? Evidence from a Field Experiment on Airbnb,” was named runner-up for the best paper prize at the 2022
@BUQuestrom
Platform Strategy Symposium!
Full paper here:
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seems like we’ve got a “good will hunting” situation in the faculty lounge at berkeley haas
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Neat visualization of the Amazon book recommendation network from
@ValdisKrebs
and
@TheEconomist
.
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thought it was bad worrying about data retention as a computational social scientist, but just found out that my friend who is doing a masters in forestry is scrambling to collect all of his thesis data before the leaves fall off the trees
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Never thought I'd hear
@WhoopiGoldberg
talking about my research on
@TheView
...but here we are!
Did the pandemic make work weeks longer? The View's Whoopi Goldberg & guest host Carly Fiorina discuss new Berkeley Haas/Microsoft research.
@daveholtz
via
@YouTube
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me when my friends want to hang out but im trying to work through an r&r
Emily Blunt says that Cillian Murphy did not attend cast dinners while shooting
#Oppenheimer
because “the sheer volume of what he had to take on and shoulder is so monumental.”
“His brain was just too full,” she adds.
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why yes, i did just order custom conversation hearts for my mba class at
@berkeleyhaas
that meets 6pm-9:30pm next tuesday night
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Pretty bold of
#TheNightOf
to kill off the star of the show (John Turturro's eczema) with two episodes to go...
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"Rubber duck causal inference" = having a dialogue with a
@deaneckles
cardboard cutout while designing field experiments.
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Thursday night (3/11) at 8PM, I’ll be speaking at a
@joinClubhouse
fireside chat hosted by
@is_spoc
about my experience on the job market this past year, along with
@alexpmil
@raveeshmayya
and
@ChenshuoSun
. Should be fun!
DM me if you want to attend and need a Clubhouse invite.
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The instrumental variables
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This early research, which is not peer reviewed, is just showing a correlation between getting a flu shot and getting COVID-19. No RCT. Entirely possible (and, imo, likely) that those who got a flu shot were just better at taking precautions to guard against COVID-19.
HUGE— A Flu Shot Might Reduce Coronavirus Infections, Early Research Suggests
➡️Hospital workers who got flu shot vaccinated were significantly less likely to develop
#COVID19
than those who did not, early study shows.
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This null effect masks considerable and important heterogeneity: initially low-performing entrepreneurs saw a 10% performance decline, whereas high performers experienced a 20% performance boost from AI use! 4/
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🚨 A new working paper from our team at
@mit_ide
about the social and geographic spillovers that exist between regions as they implement and lift social distancing policies in an uncoordinated way amid the
#Covid_19
pandemic.
Joint work with
@mfzhao
,
@SBenzell
, Cathy Cao, ...
[🚨NEW WORKING PAPER🚨] As local governments reopen, we study how policies in one region affect mobility & social distancing in other regions & the consequences of uncoordinated policy responses to
#Covid_19
. 1/
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after many years of threatening to do so, finally got arthur russell-inspired tattoo(s) based on tom lee’s beautiful artwork.
also a fun coincidence that this is the art for the album “corn” and i got the tattoos in the land of maíz.
thank you
@AnabelQ
!!!
cc:
@AudikaRecords
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New: joint work with
@sinanaral
and Diana MacLean, on the link between social structure & trust in digital markets
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performing my weekly ritual of saving dozens of articles to pocket even though i will never read them
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📢 our paper on the costs of uncoordinated
#COVID19
policies across US states and counties is now published in
@PNASNews
:
See
@sinanaral
’s thread for a summary of our results and the policy implications!
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I would highly recommend submitting to this workshop if you study platforms! I had the pleasure of attending this past spring and found it to be a really fantastic, high-quality event.
(full disclosure: I’m on the scientific committee this year)
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"You should be honored by my LATEness"
A lesson in eKanyemetrics on the benefit of using *Stronger* instruments
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The first four sessions of the class cover an overview/introduction to online markets and platforms, platform growth, discrimination/bias/fairness, and A/B testing and experimentation:
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Extended abstract for “The Engagement-Diversity Connection: Evidence from a Field Experiment on Spotify” w/
@BenCarterette
,
@pchandarr
,
@ZahraNazari1
,
@hsmcramer
&
@sinanaral
can now be found in the EC 20 proceedings:
Full paper:
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I'm giving a talk in NYC on June 16th for the
@BerkeleyHaas
alumni of NY! I'll be presenting a brief overview of my research on the platform economy, including research done in collaboration with firms like
@airbnb
and
@spotify
.
If you'll be in NYC and would like to attend, LMK!
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is it weird that i sometimes visualize building up my academic cv as filling in something that looks like an rpg skill tree?
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I had a great experience at SICSS 2018, and would highly recommend applying to this year's at
@Princeton
!
@msalganik
&
@chris_bail
are amazing, as are the speakers and other participants. This is a great way to meet others doing CSS research, esp. in fields other than your own!
Announcing the 2019 Summer Institute in Computational Social Science, June 16-29
@princeton
. For grad students, post-docs & beginning faculty. Program is free for participants. Co-organized by
@msalganik
&
@chrisbail
. Apply by Feb 20:
#SICSS2019
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Great 1st session of the fall
@mit_ide
seminar series today with
@deaneckles
! Excited for the rest of this semester's speakers:
@zoebcullen
@DG_Rand
@5harad
@KHosanagar
@bocowgill
@abdavidson
@informor
@reneegosline
@johnjhorton
@mounialalmas
Schedule:
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We are now accepting submissions for
@CODEConference
2023!!!
We welcome any and all research related to digital experimentation, whether it comes from academia, industry, or somewhere else. If you have any questions about whether your work is a good fit, shoot me a DM/email.
🚨Call for
@CODEConference
abstracts🚨
Submit your work by Sept. 15 for the chance to present
@MIT
at the 10th annual
@CODEConference
🐦Early bird registration open now - Oct. 2
👉Submit your work and register here:
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@johnjhorton
@JeffProbst
@survivorcbs
@JesseTannenbaum
@UCBerkeley
it’s a great question. only one way to find out…
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Despite being busy putting the finishing touches on his book,
@sinanaral
still made it to WISE this year in the form of a diesel pump.
cc:
@mfzhao
@madhavkumar2005
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just wrote a text message and without thinking, signed my name at the bottom…
the aging process continues 👴🏻👴🏻👴🏻
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