Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
The valuation effect of diversification is examined for large samples of firms in Germany, Japan, and the United Kingdom for 1992 and 1994. We find no significant diversification discount in Germany, but a significant diversification discount of 10 percent in Japan and 15 percent in the U.K. Concentrated ownership in the hands of insiders enhances the valuation effect of diversification in Germany, but not in Japan or the U.K. For Japan, only firms with strong links to an industrial group have a diversification discount. These findings suggest that international differences in corporate governance affect the impact of diversification on shareholder wealth.