The internationally composed examination board and the disputant traveled to the Universidad de Burgos for the defense. In his cooperative doctoral program, David Knäble focused on the topic of "Circular Economy from Macro to Micro: National Impact, Corporate Strategies and Digital Engagement." He was supervised by Prof. Dr. Thomas Baumgärtler (Hochschule Offenburg) and Prof. Dr. Esther de Quevedo Puente (Universidad de Burgos).