DS-optimal designs in one way ANOVA

Characterization and construction of optimal designs using the familiar optimality criteria, for example A-, D- and E-optimality are well studied in the literature. However the study of the Distance Optimality (DS-) criterion introduced by Sinha (1970) has very recently drawn attention of researchers. In the present article, we consider the singularly estimable full rank problem of estimating the full set of elementary treatment contrasts using the DS optimality criterion in the set up of a one way ANOVA model. Using a limit argument it turns out that a CRD in which difference between any two allocation numbers is at the most unity is uniquely DS-optimal. Acknowledgement. We are thankful to Prof. B. K. Sinha for suggesting the problem to us and many helpful discussions with him. We are also thankful to the referees for drawing our attention to the reference of Bischoff (1995) and many helpful comments.     

Budget deficits and real interest rates: Updated empirical evidence on causality

Using error-correction model (ECM) estimation, the paper empirically examines the causality relationship between the federal government budget deficit and the ex ante real interest rate yield on high grade long term tax free municipal bonds in the U.S. To clarify this deficit or interest rate relationship, the budget deficit is measured by the primary budget deficit, which excludes net interest payments by the Treasury. In a model that includes federal personal income tax rates and net international capital flows, as well as money supply growth, the ECM estimates strongly suggest a bi-directional relationship between the primary budget deficit and the ex ante real interest rate yield. Budget deficits apparently do matter! William Simon's concerns were justified.The author is indebted to P. A. V. B. Swamy for ideas and helpful suggestions and Will Perry for data assembly and processing.     

审计风险模型探讨

在对审计风险的理解基本一致的前提下,通常认为存在着一个审计风险模型。教科书中的审计模型通常是这样的:审计风险=固有风险×控制风险×检查风险(或译“觉察风险”)。对于这个审计风险模型,曾经有过的争论集中于检查风险。作为学术争论的结果和表现形式,美国审计准则说明第39号《审计抽样》曾将检查风险分解为分析性检查风险和详细测试风险,英国审计实务委员会1987年推荐的审计风险模型则在检查风险后加上了“抽样风险”。尽管存在争议,但这一基本模型已经被美国的职业团体和学术界所认可。我国《独立审计具体准则第9号——内部控制与审计…