He did his PhD work on the Agaro constituency with the PhD thesis entitled "Social Capital and its Role in Traditional Conflict Resolution in Ethiopia: The Case of Inter-Religious Conflict In Jimma Zone State", supervised by Amr Abdallah ). In 2022, Alex de Waal described Abiy's PhD thesis as constituting an anecdote on an event in which an individual friendship between people of opposite sides augmented social capital and inspired the resolution of a local violent conflict in Jimma Zone. De Waal saw the thesis as "perhaps enough for an undergraduate paper", but not deep enough to cover social capital, background literature on armed conflict and resolution, or literature on "identity, nationalism and conflict". In 2023, de Waal and colleagues recommended that Addis Ababa University re-examine Abiy's PhD thesis for plagiarism, based on their claim of the presence of plagiarism on every page of Chapter 2 of the thesis.