Zeppelin University’s Leadership Excellence Institute Zeppelin | LEIZ combines economic and psychological approaches to leadership and related issues. The purpose of the “Leadership Log” is to track the research activities of the Institute’s two professorial chairs, its degree programmes, and its strategic goals. The “Log’s” main addressees are academic institutions as well as leaders in business, politics, public administration, and civil society. The fourth issue of the “Log” places a focus on the concept of Behavioural Business Ethics. Behavioural ethics is a relatively new interdisciplinary research field aimed at contributing to a better understanding about what inhibits or facilitates ethical behaviour.