Open Innovation is a phenomenon in both research and management practice. Since radical innovation or new business development often require external technologies or ways of commercialization, many firms have shifted from a Closed to an Open Innovation model. However, firms often face difficulties during the implementation. While the implementation effort usually focuses on external ideas and technologies as well as the processes to identify them, cultural challenges are neglected.§§Philipp Herzog develops a theoretical framework arguing that Open Innovation and Closed Innovation cultures...