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Tuomas Kosonen
Research Professor at VATT Institute for Economic Research in Helsinki, Finland. I have a PhD in economics from University of Helsinki. My research focuses on public economics and labor economics. My recent publications are on behavioral effects of consumption and income taxes.
I'm co-leading Finnish Centre of Excellence in Tax Systems Research, or FIT, which is a collection of leading tax researchers based in Finland and funded by Research Council of Finland. More about FIT through this link.
Email: tuomas.kosonen (at) vatt.fi
CV: here
Published research: here
Ongoing Research
Ongoing Research
Tax Compliance in the Rental Housing Market: Evidence from a Field Experiment
with Essi Eerola (Bank of Finland), Kaisa Kotakorpi (Tampere University) and Teemu Lyytikäinen (VATT)
American Economic Journal: Economic Policy, Forthcoming
Paper: link to paper
Paying Moms to Stay Home: Short and Long Run Effects on Parents and Children
with Jon Gruber (MIT), Kristiina Huttunen (Aalto University)
NBER WP 2/2023, VATT WP 12/2022, Accepted to Journal of Public Economics, Volume 251, November 2025, 105496: link
When Are Sin Taxes Effective? From Substitution to Elasticities
with Sami Jysmä (LABORE) and Riikka Savolainen (Swansea)
Working paper: link
Discrete Labor Supply: Quasi-Experimental Evidence and Implications
with Tuomas Matikka (VATT)
Working paper: link
The Impact of Foreign Acquisitions on Top Incomes
with David Autor (MIT), Matti Sarvimäki (Aalto), Lauri Turkia (Tampere) and Tuomo Virkola (VATT)
Optimization errors in taxes
with Jarkko Harju, Aliisa Koivisto and Tuomas Matikka
Determinants of Redistributive Preferences: Evidence from natural and survey experiments
with Kaisa Kotakorpi, Satu Suonto and Janne Tukiainen
Collective Bargaining in European Countries : A Systematic Data-Driven Description
with Stefano Lombardi, Toni Juuti, Antoine Bertheau, Manudeep Bhuller, Petri Böckerman, Ana Rute Cardoso, Bernardo Fanfani, Alice Kügler, Kasperi Kuuskoski and Christoph Müller
Presentation slides at IRLE workshop on Collective Bargaining on September 19, 2025: slides
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