CUMULATIVE ADVERTISING EFFECTS: THE ROLE OF SERIAL CORRELATION; A REPLY

In a recent paper, Houston and Weiss applied a non-linear estimation procedure to a serial correlation model of advertising effect. Although the methodology is interesting, their conclusions, based on the annual Lydia Pinkham data, are in error. This paper locates the source of the error and corrects the conclusions. It also applies the Houston and Weiss methodology to the monthly Lydia Pinkham data with interesting results.     

The Detection of Nonnegligible Directional Effects With Associated Measures of Statistical Significance

ABSTRACT

When comparing two treatment groups, the objectives are often to (1) determine if the difference between groups (the effect) is of scientific interest, or nonnegligible, and (2) determine if the effect is positive or negative. In practice, a p-value corresponding to the null hypothesis that no effect exists is used to accomplish the first objective and a point estimate for the effect is used to accomplish the second objective. This article demonstrates that this approach is fundamentally flawed and proposes a new approach. The proposed method allows for claims regarding the size of an effect (nonnegligible vs. negligible) and its nature (positive vs. negative) to be made, and provides measures of statistical significance associated with each claim.     

Pairwise comparison of scale using deviances

Permutation tests based on medians are examined for pairwise comparison of scale. Tests that have been found in the literature to be effective for comparing scale for two groups are extended to the case of all pairwise comparisons, using the Tukey-type adjustment of Richter and McCann [Multiple comparison of medians using permutation tests. J Mod Appl Stat Methods. 2007;6(2):399–412] to guarantee strong Type I error rate control. Power and Type I error rate estimates are computed using simulated data. A method based on the ratio of deviances performed best and appears to be the best overall test.     

Prevention of Elder Mistreatment in Nursing Homes: Competencies for Direct-Care Staff

Existing training on elder mistreatment in nursing homes focuses on detection and reporting of abuse, with little training specifically targeted toward prevention of mistreatment before it occurs. We used qualitative interviews with nursing home staff, policy makers, and related professionals to identify training needs. Based on participant accounts, we drafted a number of competencies essential for caregiver training to prevent mistreatment in nursing homes. Competencies include those dealing with definitions and policies, risks for mistreatment, communication and respect in relationships with residents, and development of a cooperative work environment. Competencies are discussed along with illustrative examples, and implications for practice and policy are addressed.     

The World Bank's “Employing Workers” index: Findings and critiques – A review of recent evidence

This note provides an update on the ongoing debate over the World Bank's Doing Business project with a particular focus on its “Employing Workers” index, which is intended to measure difficulty of hiring, rigidity of working hours and difficulty of firing. The authors review the findings of studies that have used this index or been influenced by it and of those that inspired its construction. They go on to examine criticisms of this instrument, highlighting both conceptual and empirical problems. Their paper concludes with suggestions for alternative approaches and future research.     

Step-Down Multiple Comparison Procedures Using Medians and Permutation Tests

Richter and McCann (2007 Richter , S. J. , McCann , M. H. ( 2007 ). Multiple comparisons using medians and permutation tests . Journal of Modern Applied Statistical Methods 6 ( 2 ): 399 – 412 . [Google Scholar]) presented a median-based multiple comparison procedure for assessing evidence of group location differences. The sampling distribution was based on the permutation distribution of the maximum median difference among all pairs, and provides strong control of the FWE. This idea is extended to develop a step-down procedure for comparing group locations. The new step-down procedure exploits logical dependencies between pairwise hypotheses and provides greater power than the single-step procedure, while still maintaining strong FWE control. The new procedure can also be a more powerful alternative to existing methods based on means, especially for heavy-tailed distributions.     

A MADM justification of a budget reduction decision

In 1988, a significant budget reduction at the University of Wyoming left the Athletic Department nearly $700,000 short on operating funds compared to the previous biennium. In order to make the necessary monetary cuts, the Athletic Department eliminated the men's and women's varsity ski teams from University sponsorship, thus removing one of the most successful and popular programs from the athletic family. A protest of this action quickly spread throughout the state and the Athletic Department received harsh criticism. However, through the cardinal preference techniques of Multiple Attribute Decision Making, it was determined that the criticism of the Athletic Department for dropping the ski programs was unfounded. But in light of the politics of the situation, after several months of deliberation, the ski programs were eventually reinstated with a greatly reduced budget and the team committed to raise a certain percentage of their monetary requirements through their own fund raising efforts.     

语言意识形态和语言秩序:全球化与美中两国的多语(教育)战略

全球化给美国和中国的多语教育带来什么挑战?美中两国采取何种语言战略应对全球化挑战?这些都是全球化时代大国在政治斗争和软实力较量中不可回避的问题.针对这些问题,本文提出语言意识形态和语言秩序两个概念,并以这两个概念为理论框架,对美中两国的语言意识形态、语言秩序及语言战略的历史和现实做出初步分析.全球化正在改变美中两国的语言意识,并重组两国的语言秩序,从而给多语教育带来挑战和机会.