Published research papers
Arms Technology and the Coercive Imbalance Outside Western Europe. Joint with Jacob Hariri. The Journal of Politics, 86(4), 1557-1573, October 2024
National and Global Impacts of Genetically Modified Crops. Joint with Casper Worm Hansen. American Economic Review: Insights, 5 (2): 224-40, June 2023. (Ungated WP version) (VoxEU)
Jumping the Gun: How Dictators Got Ahead of Their Subjects. Joint with Jacob Hariri. The Economic Journal, Volume 133, Issue 650, February 2023, Pages 728–760 (Featured article)
Two Blades of Grass: The Impact of the Green Revolution. (Online appendix) Joint with Douglas Gollin and Casper Worm Hansen. Journal of Political Economy (2021), 129(8)
A Consistent Measure of Hours Worked for International Productivity Comparisons. Economic Letters, Vol. 166, May 2018, Pages 14-17.
Irrigation and Autocracy. Joint with Jeanet Bentzen and Nicolai Kaarsen. Journal of the European Economic Association (2017) 15 (1): 1-53 (Lead article).
Skill Complementarity and the Dual Economy. The European Economic Review, Vol. 74, February 2015, Pages 296-285.
Monetary Policy Shocks and Risk Premia in the Interbank Market. The B.E. Journal of Macroeconomics: Vol. 11 : Iss. 1 (Topics), Article 4, 2011.
Working papers and ongoing projects
Who fed China? Joint with Casper Worm Hansen. (VoxEU)
A new data set on arms technology adoption 1816-2023. Joint with Jacob Hariri. The data are available as part of the Correlates of War Project .
Drought (tentative title). Joint with Leonard Krapf and Caper Worm Hansen
The Anatomy of Empires (tentative title). Joint with Jacob Hariri.
Dormant projects
Technology Trees in Models of Endogenous Growth.
Structural Transformation in the 20th Century: A New Database on Agricultural Employment Around the World. The data set is available here.
Blog posts related to my research
The Perils of Modern Arms. Broadstreet, October 2024.
Arms and the Disadvantage of Technological Backwardness. The JOP Blog, October 2024.
The other China shock: How surging Chinese imports transformed global agriculture. VoxEU, November 2023.
When agriculture drives development: Lessons from the Green Revolution. VoxEU, March 2021.
Selected opinion pieces and interviews in Danish
Genredigering kan redde fremtidens afgrøder, men kræver ny lovgivning. Altinget, 22. januar 2025
Våbenkapløbet. Weekendavisen, 25 januar 2023.
Gymnasiematematik har stor betydning for fremtidig indtjening. Altinget, 29. august 2017
Man gjorde en generation af gymnasieelever til forsøgskaniner - og kender ikke engang resultatet. Altinget, 14. september 2017
Other Publications in Danish
Triumph of the City by Ed Glaeser. Book review, Tidsskriftet Politik , vol .14(3), s. 70
Unified Growth Theory by Oded Galor. Book review, Tidsskriftet Politik , vol .14(4), s. 70-74.
Why Nations Fail by Daron Acemoglu and James Robinson. Book review, Tidsskriftet Politik , vol .15(2), s. 70-74.
Reports for Produktivitetskommissionen (The Productivity Commission), including Det handler om velstand of velfærd, Danmarks produktivitet – hvor er problemerne?, and Uddannelse og innovation