We claim that there is a link between corporate control structure and manag
ers' strategy towards unrelated mergers and risk diversification. Companies
with greater ownership concentration are less diversified. Evidence also s
hows that corporate diversification generally results in value lass while f
ocussing is value increasing. This highlights the potentially detrimental e
ffect of agency problems on corporate strategy. Copyright (C) 1999 John Wil
ey & Sons, Ltd.