Paul Harvey Aron (1921-1991) was an expert on Japanese investments and a historian of the Soviet Union. Researchers interested in the Japanese stock market, Japanese industry, American investment in Japan, and Japanese investment in the United States in the 1970s and 1980s will be particularly interested in Series I. But the bulk of these files pertain to Aron's academic career, and will be of greatest interest for researchers studying Russian and Soviet history—in particular, Soviet historians and historiography in the 1930s (the subject of Aron's unpublished dissertation, much of which is included in Subseries II.3).