Advertising in an oligopoly with differentiated goods under general demand and cost functions: A differential game approach. - Masahiko Hattori; Yasuhito Tanaka (CoRR, 2019)

License Fees in Oligopoly When Outside Innovator can Enter the Market: Two-Step Auction. - Masahiko Hattori; Yasuhito Tanaka (IGTR, 2020)