An Economic History of Europe: Knowledge, Institutions and Growth, 600 to the Present 2nd Edition (with Karl Gunnar Persson)
Cambridge University Press (2015)
A Land of Milk and Butter: How Elites Created the Modern Danish Dairy Industry (with Markus Lampe)
University of Chicago Press (2018)
Cliometric approaches to international trade (with Markus Lampe)
In C. Diebolt and M. Haupert (Eds.) (2015), Handbook of Cliometrics. Berlin: Springer.
Malta and the Nineteenth Century Grain Trade: British free trade in a microcosm of Empire?
In J. Chircop (ed.), Colonial Encounters: Maltese Experiences of British Rule 1800-1970s. Malta: Horizons.
Regional GDP in Denmark, 1850–2010 (with Kari Anne Janisse, Peter Sandholt Jensen, and Cristina Victoria Radu)
Chapter 3.3 in J.R. Rosés and N. Wolf (eds.), The Economic Development of Europe's Regions: A Quantitative History since 1900, London: Routledge (2020).