Lennard Welslau
Lennard is a PhD Fellow at the University of Copenhagen and Danmarks Nationalbank. He was a Research analyst at Bruegel from October 2022 to September 2024, working on sovereign debt sustainability, EU fiscal governance, bond markets and inflation. He studied Philosophy, Politics and Economics in Freiburg and Buenos Aires and holds an MSc in Economics from the University of Copenhagen. Before joining Bruegel, he worked as a trainee with the European Central Bank, held research assistant positions at the University of Freiburg and Copenhagen Business School, and was a research consultant with the UN Economic Commission for Latin America and the Caribbean.
Lennard is a native German speaker and is fluent in English and Spanish.
Featured work
What will it take to stabilise debt in advanced countries?
Debt can be stabilised across advanced economies yet many face sizeable fiscal adjustments and rising vulnerability to market shifts
Sovereign Debt and Fiscal Integration in the European Union
What Germany’s medium-term fiscal plan means for Europe
EU leniency on Germany’s fiscal plan highlights rule rigidity and the need for reform to support investment
Demographic change will hit public debt sustainability in European Union countries
All work
Working paper
20 November 2025
What will it take to stabilise debt in advanced countries?
Debt can be stabilised across advanced economies yet many face sizeable fiscal adjustments and rising vulnerability to market shifts
External publication
06 November 2025
Policy Brief
22 October 2025
What Germany’s medium-term fiscal plan means for Europe
EU leniency on Germany’s fiscal plan highlights rule rigidity and the need for reform to support investment
External publication
16 September 2025
Dataset
25 October 2024
Policy Brief
18 September 2024
How demographic change will hit debt sustainability in European Union countries
The European Union faces a dramatic demographic problem in the decades ahead
Policy Brief
20 June 2024
The implications of the European Union’s new fiscal rules
This policy brief summarises the main features of the new European Union fiscal framework
External publication
10 March 2024
Report
28 February 2024
First Glance
26 March 2024
The EU needs a methodology for including reform impacts in fiscal trajectories
Such a methodology, and a governance mechanism for managing associated risks, must be in place before the new fiscal framework kickstarts in September