On the Centenary of Progress and Poverty

A bstract . Henry George was more fortunate than many authors of classics. His Progress and Poverty won understanding, appreciation and recognition from the start. The book presented a theory of the business cycle based on monopoly of which theorists must take account. It also represented the peak of the development of the classical school. George shared with the school's great figures, particularly Adam Smith and David Ricardo , a Utopian vision of a free economy. But George went beyond them in envisioning a free society in a new moral order; he was one of the great libertarian philosophers. Moreover, as Teilhac has shown, he projected into economics a social rationalism that opened the way for a reborn political economy based on scientific method. Though his is one of the enduring creations of the human mind which spur the species on to greater cultural achievements, it is, first and foremost, an economic classic. Insofar as George pointed to monopoly and privilege as socially disastrous institutions , his teaching has been adopted by economists everywhere. His doctrine that all men share a common right to the earth now rules space exploitation—that is, the universe —and the deep oceans and it is winning grudging recognition in the one-fourth of the earth humanity inhabits.     

基于随机波动率假设的权证定价理论评述

随机波动率(SV)模型在衍生品定价和风险管理中的应用开始发挥越来越重要的作用,但是,由于很难得到似然函数的闭型表达式,SV模型的参数估计问题严重限制了它在金融实践领域的普及应用。不过,近年来,学者们提出了许多旨在解决SV模型参数估计问题的有效且可行的新方法,大大推进了SV模型的应用化进程。本文将在权证定价分析的框架内,重点评述SV模型的参数估计方法,并从理论和实证的角度对它们的优点和不足进行简要评介和比较。