Olle Hammar
@ollehammar.bsky.social
Assistant Professor in Economics @linnaeus-econ.bsky.social. Researcher @futures-studies.bsky.social. Affiliate @iza.org @rfberlin.bsky.social. PhD from Uppsala University. Inequality, migration, culture, replication. http://www.ollehammar.com
Proud to be an @i4replication.bsky.social Fellow! 💫
📢 We’re thrilled to announce the launch of our new “Research Fellows” program! 🎉
If you’ve contributed to a Replication Game, published in our Discussion Papers series, or helped organize one of our events — you’re invited to join the roster of I4R Research Fellows.
If you’ve contributed to a Replication Game, published in our Discussion Papers series, or helped organize one of our events — you’re invited to join the roster of I4R Research Fellows.
November 25, 2025 at 7:33 PM
Proud to be an @i4replication.bsky.social Fellow! 💫
Reposted by Olle Hammar
Together w/ @odissei.bsky.social, I4R is organizing CBS Replication Games, re-analyzing 6 papers w/ Dutch administrative microdata! Teams get 1 month of microdata access in Feb 2026, meeting in Utrecht for a three-day hackathon. Interested? Register by Nov 30! tinyurl.com/yx3e7b3a
November 25, 2025 at 1:07 PM
Together w/ @odissei.bsky.social, I4R is organizing CBS Replication Games, re-analyzing 6 papers w/ Dutch administrative microdata! Teams get 1 month of microdata access in Feb 2026, meeting in Utrecht for a three-day hackathon. Interested? Register by Nov 30! tinyurl.com/yx3e7b3a
⛷️ Strong recommend on this Winter School 👇
📢 Call for Papers 📢
💡 19th Winter School on #Inequality & #SocialWelfare Theory (IT19) Jan. 6-10, 2026 in Alba di Canazei.
🤝 Organized by @cesifo.org, the University of Verona & @liser.lu
⏳ Application deadline: Nov. 27
🔗 Click to discover the confirmed speakers + more: liser.lu/events/canaz...
💡 19th Winter School on #Inequality & #SocialWelfare Theory (IT19) Jan. 6-10, 2026 in Alba di Canazei.
🤝 Organized by @cesifo.org, the University of Verona & @liser.lu
⏳ Application deadline: Nov. 27
🔗 Click to discover the confirmed speakers + more: liser.lu/events/canaz...
November 21, 2025 at 7:27 PM
⛷️ Strong recommend on this Winter School 👇
Reposted by Olle Hammar
Superb research and engagement at ASWEDE's 10th conference. Thanks to everyone who made this event memorable! #ASWEDE2025
November 19, 2025 at 1:10 PM
Superb research and engagement at ASWEDE's 10th conference. Thanks to everyone who made this event memorable! #ASWEDE2025
Reposted by Olle Hammar
ASWEDE's 10th Annual Conference kicks off tomorrow at Nääs Fabriker! We look forward to sharp presentations and discussions on development economics from PhD students and senior researchers. Program: bit.ly/3K1sRUJ
bit.ly
November 16, 2025 at 11:54 AM
ASWEDE's 10th Annual Conference kicks off tomorrow at Nääs Fabriker! We look forward to sharp presentations and discussions on development economics from PhD students and senior researchers. Program: bit.ly/3K1sRUJ
Reposted by Olle Hammar
CfP🗣️: 7th edition of the Workshop on the Economics and Politics of Migration. 28-29 May 2026, in Rome!
Organised by CEPR/King's College/EBRD/Sapienza
Keynotes are Paolo Pinotti (Bocconi) and Vicky Fouka (Stanford).
Submit your papers: docs.google.com/forms/d/e/1F...
Deadline 23 Jan.
🤓🔥🍕🍝🍷
Organised by CEPR/King's College/EBRD/Sapienza
Keynotes are Paolo Pinotti (Bocconi) and Vicky Fouka (Stanford).
Submit your papers: docs.google.com/forms/d/e/1F...
Deadline 23 Jan.
🤓🔥🍕🍝🍷
November 12, 2025 at 9:20 AM
CfP🗣️: 7th edition of the Workshop on the Economics and Politics of Migration. 28-29 May 2026, in Rome!
Organised by CEPR/King's College/EBRD/Sapienza
Keynotes are Paolo Pinotti (Bocconi) and Vicky Fouka (Stanford).
Submit your papers: docs.google.com/forms/d/e/1F...
Deadline 23 Jan.
🤓🔥🍕🍝🍷
Organised by CEPR/King's College/EBRD/Sapienza
Keynotes are Paolo Pinotti (Bocconi) and Vicky Fouka (Stanford).
Submit your papers: docs.google.com/forms/d/e/1F...
Deadline 23 Jan.
🤓🔥🍕🍝🍷
En tanke på fars dag till min morfar Lennart Berggren som hade varit 98 år idag och som 25-årig filosofistudent i Lund var den sommarvikarierande visselblåsaren som avslöjade Vipeholmsexperimenten: sverigesradio.se/play/avsnitt...
November 9, 2025 at 7:58 PM
En tanke på fars dag till min morfar Lennart Berggren som hade varit 98 år idag och som 25-årig filosofistudent i Lund var den sommarvikarierande visselblåsaren som avslöjade Vipeholmsexperimenten: sverigesradio.se/play/avsnitt...
🎉 Honored to join @rfberlin.bsky.social as a Research Affiliate!
Olle Hammar
ROCKWOOL Foundation
www.rfberlin.com
November 7, 2025 at 12:43 PM
🎉 Honored to join @rfberlin.bsky.social as a Research Affiliate!
Reposted by Olle Hammar
There's less than 1️⃣ month to go until the deadline for submissions to our #CallForPapers for the 2026 World Inequality Conference.
🏃♀️Hurry up and submit your paper by 1 December!
inequalitylab.world/en/event/wor...
🏃♀️Hurry up and submit your paper by 1 December!
inequalitylab.world/en/event/wor...
World Inequality Conference 2026 - World Inequality Lab
The World Inequality Lab is organizing the third edition of the World Inequality Conference, to be held at the Paris School of Economics on June 4-5, 2026.
inequalitylab.world
November 5, 2025 at 3:50 PM
There's less than 1️⃣ month to go until the deadline for submissions to our #CallForPapers for the 2026 World Inequality Conference.
🏃♀️Hurry up and submit your paper by 1 December!
inequalitylab.world/en/event/wor...
🏃♀️Hurry up and submit your paper by 1 December!
inequalitylab.world/en/event/wor...
Den årliga rapporteringen 👇
November 3, 2025 at 5:59 PM
Den årliga rapporteringen 👇
Reposted by Olle Hammar
Here are our 5 Job-market candidates this year: a strong cohort of excellent researchers, from macro to health and labor/AI. Have a look:
www.uu.se/institution/...
www.uu.se/institution/...
Job Market kandidater 2025/2026
- Uppsala universitet
www.uu.se
October 30, 2025 at 11:20 AM
Here are our 5 Job-market candidates this year: a strong cohort of excellent researchers, from macro to health and labor/AI. Have a look:
www.uu.se/institution/...
www.uu.se/institution/...
Reposted by Olle Hammar
📢 CfP Alert!
We’re excited to announce the 3rd Bristol Applied Economics Meetings (BÆM).
🗓️ 5–8 May 2026 | 📍 University of Bristol
Three focused workshops in applied economics: Development, Migration & Fairness.
🔗 www.baem.info
We’re excited to announce the 3rd Bristol Applied Economics Meetings (BÆM).
🗓️ 5–8 May 2026 | 📍 University of Bristol
Three focused workshops in applied economics: Development, Migration & Fairness.
🔗 www.baem.info
October 31, 2025 at 1:43 PM
📢 CfP Alert!
We’re excited to announce the 3rd Bristol Applied Economics Meetings (BÆM).
🗓️ 5–8 May 2026 | 📍 University of Bristol
Three focused workshops in applied economics: Development, Migration & Fairness.
🔗 www.baem.info
We’re excited to announce the 3rd Bristol Applied Economics Meetings (BÆM).
🗓️ 5–8 May 2026 | 📍 University of Bristol
Three focused workshops in applied economics: Development, Migration & Fairness.
🔗 www.baem.info
Reposted by Olle Hammar
A widely held view is that the Gini coefficient is not decomposable by subgroups. This paper proposes an axiomatic framework that ensures well-behaved within and between-group terms under which the Gini is decomposable with a novel and unique formula. buff.ly/XdnzG6F
October 24, 2025 at 1:05 PM
A widely held view is that the Gini coefficient is not decomposable by subgroups. This paper proposes an axiomatic framework that ensures well-behaved within and between-group terms under which the Gini is decomposable with a novel and unique formula. buff.ly/XdnzG6F
Reposted by Olle Hammar
🎖️ The Prize in Economic Sciences is awarded to Joel Mokyr, Philippe Aghion and Peter Howitt!
Over the last two centuries the world has seen sustained economic growth. This year’s laureates explain how innovation provides the impetus for further progress.
#PrizeinEconomicSciences #NobelPrize
Over the last two centuries the world has seen sustained economic growth. This year’s laureates explain how innovation provides the impetus for further progress.
#PrizeinEconomicSciences #NobelPrize
October 13, 2025 at 9:47 AM
🎖️ The Prize in Economic Sciences is awarded to Joel Mokyr, Philippe Aghion and Peter Howitt!
Over the last two centuries the world has seen sustained economic growth. This year’s laureates explain how innovation provides the impetus for further progress.
#PrizeinEconomicSciences #NobelPrize
Over the last two centuries the world has seen sustained economic growth. This year’s laureates explain how innovation provides the impetus for further progress.
#PrizeinEconomicSciences #NobelPrize
🚨 Our comment on Begum, Grossman & Islam (2018) in @readdemography.bsky.social is now available as an @i4replication.bsky.social working paper (w/ @carlbonander.bsky.social, @nikljako.bsky.social, Bensch & Brodeur). Read it here 👉 www.econstor.eu/bitstream/10...
October 10, 2025 at 1:31 PM
🚨 Our comment on Begum, Grossman & Islam (2018) in @readdemography.bsky.social is now available as an @i4replication.bsky.social working paper (w/ @carlbonander.bsky.social, @nikljako.bsky.social, Bensch & Brodeur). Read it here 👉 www.econstor.eu/bitstream/10...
Awesome conference @isi-munich.bsky.social! 🤩 I had a great time presenting in the wealth measurement session this morning! #ISIWealthConference2025
October 9, 2025 at 2:04 PM
Awesome conference @isi-munich.bsky.social! 🤩 I had a great time presenting in the wealth measurement session this morning! #ISIWealthConference2025
Reposted by Olle Hammar
Working on topics of Inequality and the #environment ? Join @sitestockholm.bsky.social
workshop on Nov 28! Deadline October 15.
workshop on Nov 28! Deadline October 15.
October 2, 2025 at 7:44 AM
Working on topics of Inequality and the #environment ? Join @sitestockholm.bsky.social
workshop on Nov 28! Deadline October 15.
workshop on Nov 28! Deadline October 15.
Reposted by Olle Hammar
🚨I4R is looking to hire postdoc fellows in public health and computer science!
The postdoc will join a team of researchers and help mass reproduce studies in leading public health journals or develop AI replicator agents.
Info 👇
The postdoc will join a team of researchers and help mass reproduce studies in leading public health journals or develop AI replicator agents.
Info 👇
September 30, 2025 at 6:18 PM
🚨I4R is looking to hire postdoc fellows in public health and computer science!
The postdoc will join a team of researchers and help mass reproduce studies in leading public health journals or develop AI replicator agents.
Info 👇
The postdoc will join a team of researchers and help mass reproduce studies in leading public health journals or develop AI replicator agents.
Info 👇
Reposted by Olle Hammar
👋 New colleagues announcement! We're very happy to have two new PhD students joining our department! A warm welcome to Fanni Forslind @fanniforslind.bsky.social and Marielle Appelkvist @marielleappelkvist.bsky.social! 🤩
September 19, 2025 at 12:34 PM
👋 New colleagues announcement! We're very happy to have two new PhD students joining our department! A warm welcome to Fanni Forslind @fanniforslind.bsky.social and Marielle Appelkvist @marielleappelkvist.bsky.social! 🤩
Reposted by Olle Hammar
Join us for ASWEDE's 10th annual conference in Development Economics! November 17-18 at Nääs Fabriker, outside Gothenburg. Submission deadline in one week: September 26. Open to PhD students and senior researchers. Details below. #ASWEDEConference #DevelopmentEconomics
September 19, 2025 at 6:58 AM
Join us for ASWEDE's 10th annual conference in Development Economics! November 17-18 at Nääs Fabriker, outside Gothenburg. Submission deadline in one week: September 26. Open to PhD students and senior researchers. Details below. #ASWEDEConference #DevelopmentEconomics
Reposted by Olle Hammar
📆 Save the date: the 3rd edition of the World Inequality Conference will take place on 4–5 June 2026 at Paris School of Economics @pse.bsky.social
The call for papers is open until December 1.
🔗 More details & submission: inequalitylab.world/en/event/wor...
The call for papers is open until December 1.
🔗 More details & submission: inequalitylab.world/en/event/wor...
September 17, 2025 at 2:59 PM
📆 Save the date: the 3rd edition of the World Inequality Conference will take place on 4–5 June 2026 at Paris School of Economics @pse.bsky.social
The call for papers is open until December 1.
🔗 More details & submission: inequalitylab.world/en/event/wor...
The call for papers is open until December 1.
🔗 More details & submission: inequalitylab.world/en/event/wor...
Reposted by Olle Hammar
1/ The Vertical & Horizontal AI Replication Games debut at the University of Ottawa on Oct 16! This is the first event feeding into our next paper, and all participants will be listed as coauthors.
Apply: www.surveymonkey.ca/r/TKRS5HG
Apply: www.surveymonkey.ca/r/TKRS5HG
September 16, 2025 at 5:38 PM
1/ The Vertical & Horizontal AI Replication Games debut at the University of Ottawa on Oct 16! This is the first event feeding into our next paper, and all participants will be listed as coauthors.
Apply: www.surveymonkey.ca/r/TKRS5HG
Apply: www.surveymonkey.ca/r/TKRS5HG
🚨 We have a comment on Begum et al (2018) forthcoming in @readdemography.bsky.social - see link below! @i4replication.bsky.social
We also document changes in language about the randomization between the working paper and published version, and inconsistencies in the authors’ response. See full report (here osf.io/wp8fr/) for more details.
August 27, 2025 at 4:18 PM
🚨 We have a comment on Begum et al (2018) forthcoming in @readdemography.bsky.social - see link below! @i4replication.bsky.social
Reposted by Olle Hammar
#GDRI_rep Update 8a: Major updates coming up over the next few weeks.
1st update: We reproduced "Parent–teacher meetings and student outcomes" some time ago. The paper was then retracted by the editors of the Euro Econ Rev.
Additional studies are connected (see diagram)
🧵
1st update: We reproduced "Parent–teacher meetings and student outcomes" some time ago. The paper was then retracted by the editors of the Euro Econ Rev.
Additional studies are connected (see diagram)
🧵
August 27, 2025 at 3:33 PM
#GDRI_rep Update 8a: Major updates coming up over the next few weeks.
1st update: We reproduced "Parent–teacher meetings and student outcomes" some time ago. The paper was then retracted by the editors of the Euro Econ Rev.
Additional studies are connected (see diagram)
🧵
1st update: We reproduced "Parent–teacher meetings and student outcomes" some time ago. The paper was then retracted by the editors of the Euro Econ Rev.
Additional studies are connected (see diagram)
🧵
Reposted by Olle Hammar
📢 Call for Papers - Fall 2025 📢
If you are a #junior scholar studying the #economics of #migration, we encourage you to submit!
📧 Email [email protected]
🗓️ Submit by September 1, 2025
🎤 Seminars will take place on Tuesdays at 5:30pm CET
If you are a #junior scholar studying the #economics of #migration, we encourage you to submit!
📧 Email [email protected]
🗓️ Submit by September 1, 2025
🎤 Seminars will take place on Tuesdays at 5:30pm CET
July 17, 2025 at 4:06 PM
📢 Call for Papers - Fall 2025 📢
If you are a #junior scholar studying the #economics of #migration, we encourage you to submit!
📧 Email [email protected]
🗓️ Submit by September 1, 2025
🎤 Seminars will take place on Tuesdays at 5:30pm CET
If you are a #junior scholar studying the #economics of #migration, we encourage you to submit!
📧 Email [email protected]
🗓️ Submit by September 1, 2025
🎤 Seminars will take place on Tuesdays at 5:30pm CET