中国股票市场风险和收益风格效应的非参数检验

本文利用Kendall协同系数检验考察我国股票市场风险和收益的风格效应。通过实证研究首次发现各风格指数的收益率、总风险及指数特有风险均具有明显的分层结构,风格效应显著。对影响风险和收益的风格因素进行的分析表明:股票风险受规模因素的影响十分明显;而股票回报率受价值因素的影响比较显著,受规模因素的影响不明显。并进一步用Spearman相关系数考察了风险与收益之间的秩相关性。本文研究结果对资产配置和风险监管等问题具有参考价值。     

FDI占中国固定资产投资比重变动的倒U形特征与决定因素实证分析

1979～2008年,FDI进入占中国年度固定资产投资总额比重的变动过程,呈现显著的倒U形变动特征。1979～2000年前后,FDI占中国年度固定资产投资比重显著上升,起促进作用的因素主要是国有企业和集体企业劳动就业人口比重相对下降,税收政策优惠,以及对外贸易开放度提高。2002～2008年,FDI占中国年度固定资产投资比重显著下降,起关键作用的因素主要有中国高等教育入学率提高,以及中国加入WTO后对外贸易壁垒下降。此外,本文还就FDI占中国年度固定资产投资比重变动的决定因素分不同地区进行了实证研究。     

One-step R-estimation in linear models with stable errors

Classical estimation techniques for linear models either are inconsistent, or perform rather poorly, under α$\alpha$-stable error densities; most of them are not even rate-optimal. In this paper, we propose an original one-step R-estimation method and investigate its asymptotic performances under stable densities. Contrary to traditional least squares, the proposed R-estimators remain root-n$n$ consistent (the optimal rate) under the whole family of stable distributions, irrespective of their asymmetry and tail index. While parametric stable-likelihood estimation, due to the absence of a closed form for stable densities, is quite cumbersome, our method allows us to construct estimators reaching the parametric efficiency bounds associated with any prescribed values (_α0,_b0)$({\alpha }_0,b_0)$ of the tail index α$\alpha$ and skewness parameter b$b$, while preserving root-n$n$ consistency under any (α,b)$(\alpha ,b)$ as well as under usual light-tailed densities. The method furthermore avoids all forms of multidimensional argmin computation. Simulations confirm its excellent finite-sample performances.     

Spatial wage disparities: Sorting matters!

Spatial wage disparities can result from spatial differences in the skill composition of the workforce, in non-human endowments, and in local interactions. To distinguish between these explanations, we estimate a model of wage determination across local labour markets using a very large panel of French workers. We control for worker characteristics, worker fixed effects, industry fixed effects, and the characteristics of the local labour market. Our findings suggest that individual skills account for a large fraction of existing spatial wage disparities with strong evidence of spatial sorting by skills. Interaction effects are mostly driven by the local density of employment. Not controlling for worker heterogeneity leads to very biased estimates of interaction effects. Endowments only appear to play a small role.     

A semiparametric GARCH model for foreign exchange volatility

A semiparametric extension of the GJR model (Glosten et al., 1993. Journal of Finance 48, 1779–1801) is proposed for the volatility of foreign exchange returns. Under reasonable assumptions, asymptotic normal distributions are established for the estimators of the model, corroborated by simulation results. When applied to the Deutsche Mark/US Dollar and the Deutsche Mark/British Pound daily returns data, the semiparametric volatility model outperforms the GJR model as well as the more commonly used GARCH(1,1) model in terms of goodness-of-fit, and forecasting, by correcting overgrowth in volatility.     

房价,地方政府与经济人行为逻辑

房价持续快速上涨的原因是多方面的,地方政府的行为值得认真分析,本文认为借助经济人假设能很好地分析地方政府表现出的房价助推行为是为了自身利益的最大化,因此对中央政府的宏观调控不会认真对待.解决这一问题,也应该重视经济人行为逻辑,进行体制改革.     

基于企业类型差异的企业家报酬-业绩的相关性

关于企业家报酬与企业业绩的相关性分析,主要存在强相关性和弱相关性两种相悖的观点.本文通过对不同类型的企业的经验分析资料认为,企业的类型特征差异直接影响报酬-业绩的相关性,根据不同类型企业的报酬-业绩的相关性来制定激励政策才具有现实意义.     

蜜月游市场特征的相关与回归分析——针对北京常住居民蜜月游市场

在我国,蜜月游市场发展迅猛,潜力巨大,收益率颇高.特别值得注意的是,我们调研发现:高收入者与非高收入者共享蜜月游这一高端旅游产品.为此我们进行了相关的定量分析,以进一步研究其发展脉络,揭示其变动趋势,为政府主管部门及相关旅游企业提供决策依据.