David Sadtler is an Associate of the Ashridge Strategic Management Centre. His research, teaching and consulting activities are concentrated on questions of strategy at both the corporate and business unit levels. He is the author of a number of articles on the issues and challenges of corporate level strategy. Andrew Campbell is a Director of Ashridge Strategic Management Centre. Andrew's work includes directing research projects, running management programmes and consulting with client companies. Andrew has authored 10 books based on his research and has also published numerous articles i...