Publisher’s acknowledgements

We are grateful to the following for permission to reproduce copyright material:

Figure on p 65 adapted from The BCG Portfolio Matrix from the Product Portfolio Matrix, © 1970, The Boston Consulting Group (BCG); figure on p 84 adapted from Porter, M.E. (1979) ‘How competitive forces shape strategy’, Harvard Business Review, March/April: 21–38. Copyright © 1979 by the Harvard Business School Publishing Corporation, all rights reserved. Reprinted by permission of Harvard Business Review; figure on p 106 adapted from Christensen, C.M. (1997) The Innovator’s Dilemma: When new technologies cause great firms to fail. Boston, MA: Harvard Business Review Press. Copyright © 1997 by the Harvard Business School Publishing Corporation, all rights reserved. Reprinted by permission of Harvard Business Review.