I am a Senior Lecturer (Associate Professor) at Cass Business School in London.
I work particularly on the idea of 'expert leadership'. We are accustomed to seeing organizations from Fortune 500 firms to hospitals choosing charismatic general managers for senior leadership positions over core-business experts. My research suggests that this may be wrong; organizations on average seem to perform better when they are led by individuals with expert knowledge.
The theory of expert leadership proposes a first-order requirement -- it is that leaders should first have expert knowledge in the core-business of the organizations they are to lead, holding constant both management and leadership experience and personality factors.
Cass Experts Page Here