Constantinos C. Markides Quote
A fundamental part of any firm's corporate strategy is its choice of what portfolio of business to compete in. According to the academic literature, this decision should reflect the 'superiority' of related diversification over unrelated diversification... This is because related diversification presumably allows the corporate center to exploit the interrelationships that exist among its different businesses (SBUs) and so achieve cost and/or differentiation competitive advantages over its rivals.
p. 149 - "Related diversification, core competences and corporate performance", 1994