审计准则国际化的经济学分析

审计准则是一种制度，审计准则国际化是制度变迁的过程。本文试采用经济学中的制度变迁理论来分析审计准则国际化，具体涉及变迁主体、外部利润的来源、变迁发生的前提条件、变迁的类型。最后结合我国情况提出我们应该积极应对审计准则国际化。     

转型经济利率市场化与我国货币市场发展

由于经济转型独特的初始条件,利率市场化不单单表现为放松利率管制,期间还交叉了一个利率定价传导机制重构的过程。利率定价传导机制取决于一国的金融制度与结构,尤其与货币市场的发育密切相关。目前,由于利率定价传导机制尚未完全成型,相应的利率市场化进程应以完善利率定价传导机制为重点,并最终完成以放松利率管制为主要特征的利率市场化改革。     

预防性储蓄模型及其不确定性分解

本文构造了一个包含不确定性和消费增长率的预防性储蓄模型。将引致预防性储蓄的总不确定性分解成两个成分：利率波动的不确定性和消费增长率波动的不确定性；分别用利率的条件方差和消费增长率的条件方差度量不确定性。此外，本文还使用GARCH模型模拟上述两个条件方差，使对预防性储蓄的实证分析成为可能。     

Revealed preference and differentiable demand

Summary. We prove that, for finitely many demand observations, the Strong Axiom of Revealed Preference tests not only the existence of a strictly concave, strictly monotone and continuous utility generator, but also one that generates an infinitely differentiable demand function. Our results extend those of previous related results (Matzkin and Richter, 1991; Chiappori and Rochet, 1987), yielding differentiable demand functions but without requiring differentiable utility functions.Received: 1 November 2001, Revised: 5 February 2004, JEL Classification Numbers: D11, D12. Correspondence to: Kam-Chau WongThis is a much revised version of Lee and Wong (2001). We are grateful to the Referee for valuable suggestions. We also thank Professor Marcel K. Richter for his comments.     

Social Security, Poverty and Economic Transition: An Analysis for Bulgaria 1992–96

The paper addresses the issues of poverty and social security in a transitional environment on the basis of recent economic developments in Bulgaria. Special emphasis is placed on the need for a new type of social safety net stemming from the radical changes in the political and economic system. The evolution of the social security system in Bulgaria during the transition is analysed focusing on such elements as the pension system, unemployment benefits, child allowances, etc. The empirical analysis is based on extensive use of data from the Bulgarian Household Budget Surveys during the period 1992–1996. Poverty in Bulgaria is measured using different poverty measurements and some quantitative results showing the changing dimensions of poverty in the transition period are presented and discussed in the paper.EES or e-mail at Corresponding author. E-mail:     

人民币走向自由兑换的时机选择

汇率制度的选择是一个动态的转换过程。我国目前采用的是钉住美元的汇率制度,这一汇率制度存在着明显弊端,已不适应我国市场经济发展的需要,我国经济的发展迫切需要人民币汇率由钉住汇率转向真正的管理浮动汇率。从现在起到未来的一两年内,是人民币走向浮动,实行人民币自由兑换的最佳时机。     

Modelling the dynamics of Bitcoin and Litecoin: GARCH versus stochastic volatility models

We examine and compare a large number of generalized autoregressive conditional heteroskedastic (GARCH) and stochastic volatility (SV) models using series of Bitcoin and Litecoin price returns to assess the model fit for dynamics of these cryptocurrency price returns series. The various models examined include the standard GARCH(1,1) and SV with an AR(1) log-volatility process, as well as more flexible models with jumps, volatility in mean, leverage effects, t-distributed and moving average innovations. We report that the best model for Bitcoin is SV-t while it is GARCH-t for Litecoin. Overall, the t-class of models performs better than other classes for both cryptocurrencies. For Bitcoin, the SV models consistently outperform the GARCH models and the same holds true for Litecoin in most cases. Finally, the comparison of GARCH models with GARCH-GJR models reveals that the leverage effect is not significant for cryptocurrencies, suggesting that these do not behave like stock prices.     

资本形成、工业化与经济增长:中国的转轨特征

把中国的经济转轨、增长与工业化联系起来是本文的一个尝试。作者认为 ,中国的经济增长在近年来越来越表现出静态的特征 ,至今尚不具备持续的动态改进的力量 ,而中国在 2 0世纪 80年代以后的转轨过程则又典型地表现为以新兴工业部门的进入和扩张为特征的持续的工业化过程。本文给出了一个帮助理解转轨后中国经济增长可持续性的概念框架和经验描述。在这个框架里 ,中国的经济增长在过去 1 0年来所表现出的下降趋势可以由过度的工业化进程来解释。     

On the forecastability of share prices on the Viennese stock exchange

In this paper the Viennese stock exchange data are analysed by using ARMA and GARCH technology. After using AIC and BIC for estimating the linear structure of the time series, to the resulting innovations a GARCH(1,1) model is fit. The resulting residuals are then tested for serial independence and constancy of its distribution to check whether the models are reasonable. Main result is that the residuals of this ARMA-GARCH(1,1)-model are reasonably iid (which is checked by BDS and classical independence tests) for index data and significantly less well-behaved for stock data. Second, there is considerable autocorrelation in the data (especially in the Viennese indices WBK and ATX) which can be exploited even with 1.25% transaction costs (which is checked by a posteriori analysis of a strategy which exploits an underlying time-varying AR(1) model), however, much higher profit can be made with 0.5% transaction costs. Furthermore, the same techniques are applied to US Standard & Poor 500 index and the results for both data sets are compared giving the result that the US-market looks much more mature than the Viennese one.Financial Support by the Institute for Advanced Studies, Vienna, and the Fonds zur Förderung der wissenschaftlichen Forschung, Vienna, Grant P 9176 is gratefully acknowledged. This paper is a slightly abbreviated version of the Research Report No. 135 by the same authors (see References), which contains many detailed plots of the results.