Biography

Joseph is a postdoctoral research associate in the CO2RE Hub at the Smith School of Enterprise and the Environment at Oxford University. He also holds additional affiliations with Oxford Net Zero, the Institute of New Economic Thinking at the Oxford Martin School, and the Economics of Scaling Carbon Capture Utilization and Storage group at the LBJ School of Public Affairs at the University of Texas at Austin.

Joseph's research lies at the intersection of microeconomic theory and environmental economics, with an emphasis on carbon policy. He holds a PhD in Economics, a B.S. in Mathematics, and a B.A. in Economics from the University of Texas at Austin.

Recent Publications

Feb 2026
Policy Briefing
How to invigorate and complete the fossil fuel transition
Sam Fankhauser ,  Myles Allen ,  Johanna Arlinghaus ,  Kaya Axelsson ,  Mirte Boot ,  Aoife Brophy ,  Ben Caldecott ,  Emily Cox ,  Alice Evatt ,  Siyu Feng ,  Benjamin Franta ,  Steven Fries ,  Cameron Hepburn ,  Conor Hickey ,  Stuart Jenkins ,  Injy Johnstone ,  Radhika Khosla ,  Javier Lezaun ,  Sam Loni ,  Alexis McGivern ,  Jessica Omukuti ,  Stephen M. Smith ,  Sugandha Srivastav ,  Joseph Stemmler ,  Ingrid Sundvor ,  Thom Wetzer
Jul 2025
Journal
How to design better incentives for carbon capture and storage in the United States
in PNAS
Sheila M. Olmstead ,  Benjamin D. Leibowicz ,  Charles F. Mason ,  Andrew R. Waxman ,  Emily Grubert ,  HR Huber-Rodriguez ,  Joseph Stemmler
Jun 2025
Blog
Policy Pathways to Achieve Net-Zero Goals: A New Look at Carbon Dioxide Removal (CDR)
Siyu Feng ,  Johanna Arlinghaus ,  Joseph Stemmler ,  Stephen M. Smith ,  Samuel Fankhauser
May 2025
Policy Briefing
Policy Evaluation and Selection to Accelerate Geological Carbon Dioxide Removal Deployment
Siyu Feng ,  Joseph Stemmler ,  Johanna Arlinghaus ,  Samuel Fankhauser ,  Stephen M. Smith
May 2025
Working Paper
A taxonomy of policies to support geological carbon dioxide removal
Johanna Arlinghaus ,  Siyu Feng ,  Joseph Stemmler ,  Samuel Fankhauser ,  Stephen M. Smith
Aug 2024
Journal
Policy support for BECCS and DACCS in Europe: the view of market participants
in Environmental Research Letters
Pu Yang ,  Sam Fankhauser ,  Stephen M. Smith ,  Ingrid Sundvor ,  Stephanie Hirmer ,  Injy Johnstone ,  Joseph Stemmler
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