This paper shows that the properties of nonlinear transformations of a fractionally integrated process depend strongly on whether the initial series is stationary or not. Transforming a stationary Gaussian I(d) process with d 0 leads to a long-memory process with the same or a smaller...

We document the importance of the choice of error measure (percentage vs. logarithmic errors) for the comparison of alternative valuation procedures. We demonstrate for several multiple valuation methods (averaging with the arithmetic mean, harmonic mean, median, geometric mean) that the ranking...

We estimate a standard principal agent model with constant relative risk aversion and lognormal stock prices for a sample of 598 US CEOs. The model is widely used in the compensation literature, but it predicts that almost all of the CEOs in our sample should hold no stock options. Instead, CEOs...

This paper investigates whether observed executive compensation contracts are designed to provide risk-taking incentives in addition to effort incentives. We develop a stylized principal-agent model that captures the interdependence between firm risk and managerial incentives. We calibrate the...

"This paper studies the reasons and the costs of separating ownership from control by analysing the decision of German dual class firms to consolidate their share structure from dual to single class equity between 1990 and 2001. We find that the firm value increases significantly by an average...

"This paper studies how the use of alternative valuation methodologies affects investment performance for a sample of 53 German venture capitalists. We measure investment performance by the amount of investments they need to write off and by the number of companies they take public. We find that...

This paper provides a proof of Granger's (1986) error correction model for fractionally cointegrated variables and points out a necessary assumption that has not been noted before. Moreover, a simpler, alternative error correction model is proposed which can be employed to estimate fractionally...

Voting and non-voting shares of ten German companies are analysed for fractional cointegration. It turns out that seven pairs of price series are fractionally cointegrated. The estimated long-memory parameter of the equilibrium errors lies between 0.5 and 0.8. If two stocks are fractionally...

This paper shows that the properties of nonlinear transformations of a fractionally integrated process depend strongly on whether the initial series is stationary or not. Transforming a stationary Gaussian I(d) process with d 0 leads to a long-memory process with the same or a smaller...