This paper examines executive turnover -- both for management and supervisory boards - - and its relation to firm performance in the largest companies in Germany in the 1980s. The management board turns over slowly -- at a rate of 10% per year -- implying that top executives in Germany have...

We study CEO turnover - both internal (board driven) and external (through takeover and bankruptcy) - from 1992 to 2005 for a sample of large U.S. companies. Annual CEO turnover is higher than that estimated in previous studies over earlier periods. Turnover is 14.9% from 1992 to 2005, implying...

This paper examines executive turnover -- both for management and supervisory boards - - and its relation to firm performance in the largest companies in Germany in the 1980s. The management board turns over slowly -- at a rate of 10% per year -- implying that top executives in Germany have...

We examine whether stock prices fully reflect the value of firms' intangible assets, focusing on research and development (R&D). Since intangible assets are not reported on financial statements under current U.S. accounting standards and R&D spending is expensed, the valuation problem may be...

We evaluate the performance of different models for the covariance structure of stock returns, focusing on their use for optimal portfolio selection. Comparisons are based on forecasts of future covariances as well as the out-of-sample volatility of optimized portfolios from each model. A few...

We evaluate the performance of different models for the covariance structure of stock returns, focusing on their use for optimal portfolio selection. Comparisons are based on forecasts of future covariances as well as the out-of-sample volatility of optimized portfolios from each model. A few...