“…Second, this paper is in line with the literature on public education, infrastructure, and inequality . With a few exceptions (e.g., Ziesemer, ), this literature pays scant attention to public R&D investment . Third, our work complements the literature on innovation and inequality (Aghion, Akcigit, Bergeaud, Blundell, & Hémous, ; Chu, ; Cozzi & Impullitti, ) with the following important differences.…”