Mathias Fjællegaard Jensen

Mathias Fjællegaard Jensen

Senior Research Fellow

Department of Economics

University of Oxford

Biography

I am a Senior Research Fellow in the Department of Economics at the University of Oxford, and affiliated with Lady Margaret Hall, Nuffield College, CEPR, and IZA. I am an applied microeconomist working at the intersection of labour, public, and health economics. I am on the 2025-26 academic job market.

My research agenda has two strands. First, I study the parent–child relationship across three phases: the effects of childbirth, intergenerational dynamics across the life course, and the consequences when the relationship ends at parental death. Second, I examine how policy, labour market dynamics, and education contribute to heterogeneous outcomes in modern labour markets and in well-being more broadly.

My work has appeared in AEJ: Applied Economics, Journal of Public Economics, and AEA Papers and Proceedings, among others. I have one paper conditionally accepted and one under revise-and-resubmit at the American Economic Review. Since finishing my PhD in 2021, I have attracted and managed about £950k in research funding to Oxford, including an ESRC New Investigator grant (2025-2028).

I communicate research to broader audiences through policy briefs (e.g., VoxEU; IZA World of Labor) and direct engagement with business and policymakers (e.g., via OUBEP). My work has been featured in international media, including the New York Times and The Observer/Guardian.

In my job market paper, Intergenerational Mobility by Sexuality, we develop a population-scale approach to observing sexuality in administrative data – a dimension rarely observable in data sources linked across generations. This provides novel population-level evidence on intergenerational dynamics and outcomes by sexuality.

Please get in touch if you would like to talk research!


News

December 2025Effects of Parental Death on Labor Market Outcomes (with Ning Zhang) conditionally accepted at the American Economic Review.

November 2025 — Joined the Centre for Economic Policy Research (CEPR) as a Research Affiliate.


Interests

  • Applied Microeconomics
  • Labour, Public, and Health Economics
  • Intergenerational Mobility
  • Inequality

Education

  • PhD in Economics, 2021

    Copenhagen Business School

  • MSc in Business Administration & Philosophy, 2018

    Copenhagen Business School

  • MPhil in Multi-Disciplinary Gender Studies, 2016

    University of Cambridge

  • BA (Hons.) in Economics, 2015

    University of Cambridge

Working Papers

Intergenerational Mobility of Immigrants in 15 Destination Countries

We estimate intergenerational mobility of immigrants and their children in fifteen receiving countries. We document large income gaps for first-generation immigrants that diminish in the second generation. Around half of the second-generation gap can be explained by differences in parental income, with the remainder due to differential rates of absolute mobility. The daughters of immigrants enjoy higher absolute mobility than daughters of locals in most destinations, while immigrant sons primarily enjoy this advantage in countries with long histories of immigration. Cross-country differences in absolute mobility are not driven by parental country-of-origin, but instead by destination labor markets and immigration policy.

Publications / accepted papers

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