LOG-PERIODOGRAM ESTIMATION OF LONG MEMORY VOLATILITY DEPENDENCIES WITH CONDITIONALLY HEAVY TAILED RETURNS

ABSTRACT

Many recent papers have used semiparametric methods, especially the log-periodogram regression, to detect and estimate long memory in the volatility of asset returns. In these papers, the volatility is proxied by measures such as squared, log-squared, and absolute returns. While the evidence for the existence of long memory is strong using any of these measures, the actual long memory parameter estimates can be sensitive to which measure is used. In Monte-Carlo simulations, I find that if the data is conditionally leptokurtic, the log-periodogram regression estimator using squared returns has a large downward bias, which is avoided by using other volatility measures. In United States stock return data, I find that squared returns give much lower estimates of the long memory parameter than the alternative volatility measures, which is consistent with the simulation results. I conclude that researchers should avoid using the squared returns in the semiparametric estimation of long memory volatility dependencies.     

Applying the international wellbeing index to investigate subjective wellbeing of New Zealanders with European and with Maori heritage

Abstract

The International Wellbeing Index (IWI), a global measure for investigating subjective wellbeing, consists of a Personal Wellbeing Index (PWI) and a National Wellbeing Index (NWI). The index is applied to the two largest ethnic populations in New Zealand—New Zealanders with European heritage and New Zealanders with Maori heritage. Psychometric characteristics of the IWI for both subsamples compare favourably to those found in other countries. However, for both subsamples, the absolute value of reported subjective wellbeing is lower than expected. Consistent with other social indicators, New Zealanders with Maori heritage show even lower values of PWI and NWI than New Zealanders with European heritage.     

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This article develops a new identification procedure to estimate the contemporaneous relation between monetary policy and the stock market within a vector autoregression (VAR) framework. The approach combines high-frequency data from the futures market with the VAR methodology to circumvent exclusion restrictions and achieve identification. Our analysis casts doubt on VAR models imposing a recursive structure between innovations in policy rates and stock returns. We find that a tightening in policy rates has a negative impact on stock prices and that the Federal Reserve (Fed) has responded significantly to movements in the stock market. Estimates are robust to various model specifications.     

On the Nonlinear Predictability of Stock Returns Using Financial and Economic Variables

In a recent article by Qi, neural networks trained by Bayesian regularization were used to predict excess returns on the S&P 500. The article concluded that the switching portfolio based on the recursive neural-network forecasts generates higher accumulated wealth with lower risks than that based on linear regression. Unfortunately, attempts to replicate the results were unsuccessful. Replicated results using the same software, approach and data detailed by Qi indicate that, in fact, the switching portfolio based on the recursive neural-network forecasts generates lower accumulated wealth with higher risks than that based on linear regression.     

经理股票期权制借鉴·问题·对策

阐述了企业经理人员股票期权制(ESO)的含义、作用和形式.分析了在我国现阶段推行该计划的主要问题,并据此提出了适合我国企业实情的对策.     

中国流通A股市场大盘股价指数研究

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浅议经营者实行股票期权存在的问题

股票期权作为一种对经营者新的激励机制在我国取得了一定的发展,但还存在一些问题,主要表现在:法律法规方面、法人治理结构方面、有效市场方面、技术方面、思想观念方面等,只有解决这些问题,股票期权才能在我国顺利发展.     

论我国推广股票期权制度的困难及其克服

股票期权作为一种对企业家的激励机制在我国还是一种新生事物,这种“舶来的洋货”对我国这种社会主义的发展中国家还有许多不适应,在实际的运行过程中也遇到了许多的困难和障碍.本文从分析这些困难和障碍入手,提出优化和完善法制环境、股票市场和企业家人才市场是我国成功地推广股票期权制度必不可少的前提条件.     

The True Cost-of-Living Index With Changing Preferences

This article investigates the theoretical and empirical properties of a true cost-of-living index under conditions of changing preferences. A family of true indexes is defined based on the notion of the current utility function. A particular index, based on the previous period's utility level, is then defined. Given this definition, a true cost-of-living index is computed based on a quadratic expenditure system estimated with quarterly data from 1960–1981. For empirical purposes, changes in preferences are represented by the linear habit formation hypothesis. This index is then compared with Paasche and Laspeyres indexes. The true cost-of-living index grows somewhat faster than either the Paasche or Laspeyres index. It also displays considerably more variability.     

高校财务核心能力的指标体系研究

文章针对目前高校财务管理的现状，引入财务核心能力理论，并对高校财务核心能力特点和构成要素进行了分析。围绕高校财务活动能力、高校财务管理能力、高校财务表现能力三个方面，设计了一套用于评价高校财务核心能力的指标体系。