He has published on international political economy, law, the First World War and land tenure.
During the 1990s and 2000s, Offer's main interest was in post-war economic growth, particularly in developed societies, and the challenges that affluence presents to well being.
His most recent work is on the strife between neoclassical economics and social democracy, each of them vying to shape the post-war decades.
In the 2016 The Nobel Factor: The Prize in Economics, Social Democracy, and the Market Turn, he argues the Nobel Memorial Prize in Economics has disproportionately been awarded to proponents of the neoclassical school.
According to the book's thesis, the Nobel Prize provides a halo of scientific authority but its committee has underrepresented social democracy as a school of economical thought.