Published online by Cambridge University Press: 07 April 2006
I am most grateful to Marco Fantuzzi, Massimo Vetta, and, in particular, to Richard Hunter for helpful criticism of an earlier draft of this paper. I am equally grateful to Christopher Carey for improving with his suggestions the last section of this paper. My thanks are also due to the editors and an anonymous CQ referee for their suggestions.
* I am most grateful to Marco Fantuzzi, Massimo Vetta, and, in particular, to Richard Hunter for helpful criticism of an earlier draft of this paper. I am equally grateful to Christopher Carey for improving with his suggestions the last section of this paper. My thanks are also due to the editors and an anonymous CQ referee for their suggestions.