Olle Hammar

Ph.D.

Olle Hammar defended his PhD thesis, The Mystery of Inequality, at Uppsala University in 2021. From 2021 to 2023, he was a postdoctoral researcher at IFN. Since 2023, he has been an assistant professor in economics at Linnaeus University and a researcher at the Institute for Futures Studies. He has also been a visiting scholar at Columbia University and the University of California, Berkeley.

Affiliated Researcher

Contact

Olle Hammar

Linnaeus University, Institute for Future Studies, and IFN

+46 (0)70 435 93 07

olle.hammar@ifn.se

Research interests: Development economics , Income and wealth inequality , Institutional economics , Integration , Migration , Political economy , Public economics , Social norms , Taxation

Some of the questions Olle Hammar tries to answer in his research:

How has global inequality developed since the 1970s?
What are the effects of culture on individual preferences for income redistribution?
How has the total income and wealth distribution in Sweden changed over the past 50 years?
What impact does civil society have on immigrant integration in Sweden?

Current writings

17 April 2025

European Economic Review

"Try to Balance the Baseline": A Comment on "Parent-Teacher Meetings and Student Outcomes: Evidence from a Developing Country" by Islam (2019)

Journal Article

by Carl Bonander, Olle Hammar, Niklas Jakobsson, Gunther Bensch, Felix Holzmeister, Abel Brodeur

12 December 2024

Delmi Report 2024:11

War Policies and Migration Aspirations in Russia

Report

by Mikael Elinder, Oscar Erixon, Olle Hammar

26 November 2024

Working Paper No. 1510

How Has the War in Ukraine Affected Russian Sentiments?

Working Paper

by Mikael Elinder, Oscar Erixson, Olle Hammar

Published at IFN

Journal Articles

17 April 2025 Bonander, Carl et al. (2025). “"Try to Balance the Baseline": A Comment on "Parent-Teacher Meetings and Student Outcomes: Evidence from a Developing Country" by Islam (2019)”. European Economic Review 175, 105021. doi.org/10.1016/j.euroecorev.2025.105021

26 May 2023 Elinder, Mikael, Oscar Erixon and Olle Hammar (2023). “Where Would Ukrainian Refugees Go if They Could Go Anywhere?”. International Migration Review 57(2), 587–602. doi.org/10.1177/01979183221131559

30 May 2022 Hammar, Olle, Mounir Karadja and Akib Khan (forthcoming). “Social Networks and Immigrant Integration: Experimental Evidence from Sweden”. Journal of Development Economics.

23 November 2020 Hammar, Olle and Daniel Waldenström (2020). “Global Earnings Inequality, 1970–2018”. Economic Journal 130(632), 2526–2545. doi.org/10.1093/ej/ueaa109

Working Papers

26 November 2024 Elinder, Mikael, Oscar Erixson and Olle Hammar (2024). “How Has the War in Ukraine Affected Russian Sentiments?”. IFN Working Paper No. 1510. Stockholm: Research Institute of Industrial Economics (IFN).

21 September 2022 Elinder, Mikael, Oscar Erixson and Olle Hammar (2022). “Where Would Ukrainian Refugees Go if They Could Go Anywhere?”. IFN Working Paper No. 1440. Stockholm: Research Institute of Industrial Economics (IFN).

05 May 2017 Hammar, Olle and Daniel Waldenström (2017). “Global Earnings Inequality, 1970–2015”. IFN Working Paper No. 1166. Stockholm: Research Institute of Industrial Economics (IFN).

Articles in Swedish

17 May 2023 Elinder, Mikael, Oscar Erixson and Olle Hammar (2023). “Vart vill ukrainarna ta vägen? Migrationspreferenser i Ukraina”. Ekonomisk Debatt 51(4), 53–57.

01 January 2020 Hammar, Olle (2020). “Femtio år av global ojämlikhet – har världen blivit mer eller mindre jämlik?”. Ekonomisk Debatt 48(4), 5–12.

Op-Eds

12 November 2024 Hammar, Olle and Erik Mohlin (2024). “Missgynnar Vetenskapsrådet ekonomiämnena?”. Curie, November 12.

06 April 2022 Elinder, Mikael, Oscar Erixson and Olle Hammar (2022). “Troligt att Sverige gravt har underskattat antalet ukrainska flyktingar”. Göteborgs-Posten, April 6.

25 November 2021 Hammar, Olle (2021). “Migranters värderingar integreras snabbt”. Svenska Dagbladet, November 25.

Popular Science

31 January 2024 Hammar, Olle and Erik Mohlin (2024). “Vetenskapsrådet och nationalekonomerna”. Ekonomisk Debatt 52(1), 79–85.

Reports

12 December 2024 Elinder, Mikael, Oscar Erixon and Olle Hammar (2024). “War Policies and Migration Aspirations in Russia”. Stockholm: The Migration Studies Delegation.

24 April 2023 Elinder, Mikael, Oscar Erixson and Olle Hammar (2023). “Under ytan: Hur många och vilka vill lämna sina länder för att flytta till EU och Sverige?”.

25 March 2022 Elinder, Mikael, Oscar Erixson and Olle Hammar (2022). “Hur många kommer fly från Ukraina och vilka EU-länder kommer de söka sig till?”.

26 November 2021 Hammar, Olle (2021). “Migranters attityder och värderingar”.

Dissertations

04 June 2021 Hammar, Olle (2021). The Mystery of Inequality: Essays on Culture, Development, and Distributions. Doctoral Dissertation. Department of Economics, Uppsala University.