23. How would you estimate the sustainability of a firm's competitive advantage? 24. What does the empirical evidence (cited in the book) say about the ability of firms to sustain ROIC over time? 25. Per the book, what can managers do to exploit the difference between the intrinsic value and the market price? 26. Per the book, what are the drivers of growth? 27. What does the empirical evidence (cited in the book) say about the ability of individual firms to sustain growth over time