A small number of studies have had a major influence on the debate over the implementation of the 45V tax credit in the Inflation Reduction Act, which subsidizes the production of clean hydrogen. In this issue brief, I will dig into two of these studies: one from the Princeton Zero Lab, and another from the MIT Energy Initiative (MITEI). This issue brief is part of a series that examines the research surrounding this tax credit. I recommend starting with a related introductory blog post, which gives an overview of all of the studies and sets the stage for what I’ll discuss here.