Communicative Language Testing of Speaking

Testing speaking ability offers plenty of scope for meeting the criteria for communicative testing.The article describes the model of CLA,analyzes basic factors involved in speaking competence,discusses what is a communicative language test of speaking,and suggests some factors that should be taken into consideration when designing a communicative language test of speaking.     

中国宏观经济和金融总量结构变化及因果关系研究

宏观经济和金融总量是否平稳是研究总量动态特征以及总量之间关系的前提。本文在考虑经济中结构变化的基础上对中国宏观经济和金融总量的时序列是具有单位根的非平稳还是分段趋势平稳进行了研究,结果发现在检验的10个总量中,有6个,即实际GDP、人均实际GDP、就业、实际银行信贷、实际储蓄负债和实际固定投资等总量的时序列是围绕着1个或2个结构断点的分段趋势平稳。分段趋势平稳的结论对于政策主导下的长期经济发展战略和短期经济稳定措施是否有效,以及总量之间关系的研究具有重要的启示。在单位根检验结果的基础上,本文还对消除趋势后的分段趋势平稳总量之间的因果关系进行了分析。     

Specification and sensitivity analysis of cross-country growth regressions

We compare the sensitivity analysis of cross-country growth regressions based on extreme bounds analysis to a more direct specification testing approach using non-nested hypotheses tests. The results suggest that those specifications that are adequate are also those that include two of the only few conditioning variables that are found to be robust, namely the standard deviation of inflation and the standard deviation of domestic credit. First Version Received: November 2000/Final Version Received: May 2001     

Robust tests for heteroskedasticity in the one-way error components model

This paper constructs tests for heteroskedasticity in one-way error components models, in line with Baltagi et al. [Baltagi, B.H., Bresson, G., Pirotte, A., 2006. Joint LM test for homoskedasticity in a one-way error component model. Journal of Econometrics 134, 401–417]. Our tests have two additional robustness properties. First, standard tests for heteroskedasticity in the individual component are shown to be negatively affected by heteroskedasticity in the remainder component. We derive modified tests that are insensitive to heteroskedasticity in the component not being checked, and hence help identify the source of heteroskedasticity. Second, Gaussian-based LM tests are shown to reject too often in the presence of heavy-tailed (e.g. t$t$-Student) distributions. By using a conditional moment framework, we derive distribution-free tests that are robust to non-normalities. Our tests are computationally convenient since they are based on simple artificial regressions after pooled OLS estimation.     

A Test of the Reliability of Current Cost Disclosures

Using data from corporate acquisitions recorded under the purchase method, this research tests the reliability (representational faithfulness) of current cost disclosures. The fair value of property, plant, and equipment recorded by the acquiring company following the acquisition is found to be significantly related to the current cost disclosures made by the acquired company prior to the acquisition. When the data are segmented according to reporting regime, the significant relationship pertains to the SFAS 33 disclosures but not to ASR 190 disclosures of current cost. The study also finds that the results pertain primarily to current cost disclosures made shortly before the acquisition date. Overall, the results support current initiatives for increased departure from historical-cost approaches to accounting, especially if these measures are made along the lines of SFAS 33 techniques rather than ASR 190 techniques.     

An approach to fuzzy hypothesis testing

In this paper an approach is presented how to test fuzzily formulated hypotheses with crisp data. The quantitiesα andβ, the probabilities of the errors of type I and of type II, are suitably generalized and the concept of a best test is introduced. Within the framework of a one-parameter exponential distribution family the search for a best test is considerably reduced. Furthermore, it is shown under very weak conditions thatα andβ can simultaneously be diminished by increasing the sample size even in the case of testingH ₀ against the omnibus alternativeH ₁: notH ₀, a result completely different from the case of crisp setsH ₀ andH ₁: notH ₀.     

An empirical comparison of GARCH option pricing models

Recent empirical studies have shown that GARCH models can be successfully used to describe option prices. Pricing such contracts requires knowledge of the risk neutral cumulative return distribution. Since the analytical forms of these distributions are generally unknown, computationally intensive numerical schemes are required for pricing to proceed. Heston and Nandi (2000) consider a particular GARCH structure that permits analytical solutions for pricing European options and they provide empirical support for their model. The analytical tractability comes at a potential cost of realism in the underlying GARCH dynamics. In particular, their model falls in the affine family, whereas most GARCH models that have been examined fall in the non-affine family. This article takes a closer look at this model with the objective of establishing whether there is a cost to restricting focus to models in the affine family. We confirm Heston and Nandi's findings, namely that their model can explain a significant portion of the volatility smile. However, we show that a simple non affine NGARCH option model is superior in removing biases from pricing residuals for all moneyness and maturity categories especially for out-the-money contracts. The implications of this finding are examined. JEL Classification G13     

大豆粉中脂肪检测能力验证分析

通过大豆粉中脂肪检测能力验证计划的实施,对全国参试的21个省（自治区、直辖市）84家实验室的检测结果进行系统评价和分析,了解和掌握国内实验室该检测领域的技术水平,明确对试验结果产生影响的重要因素。结果显示总体情况较好,满意率为79.8%。     

浅谈我国第三方检测机构的现状和发展

随着我国加入WTO以及改革开放的不断深入,第三方检测机构在我国相继涌现。本文介绍了我国第三方检测机构的发展历程,阐述了它的重要性,展望了今后的发展趋势,并根据现状和目前存在的一些问题提出了一些建议。     

银行宏观审慎监管框架下的压力测试应用研究

国外对于银行体系宏观压力测试的研究已较为系统,全球金融危机进一步凸显了压力测试对于银行体系宏观审慎监管的重要作用。为加强银行的宏观审慎监管,增强金融稳健性,美国和欧盟相继开展了银行体系的压力测试工作,在压力测试范围、压力情景设置、测试方法等方面积累了一定的经验。对比我国商业银行体系压力测试情况,我国应从加强应用研究、完善银行体系宏观审慎监管数据库、提高压力测试效率和透明度、强化测试结果应用等方面改进压力测试工作。