Variance estimation when donor imputation is used to fill in missing values

Donor imputation is frequently used in surveys. However, very few variance estimation methods that take into account donor imputation have been developed in the literature. This is particularly true for surveys with high sampling fractions using nearest donor imputation, often called nearest‐neighbour imputation. In this paper, the authors develop a variance estimator for donor imputation based on the assumption that the imputed estimator of a domain total is approximately unbiased under an imputation model; that is, a model for the variable requiring imputation. Their variance estimator is valid, irrespective of the magnitude of the sampling fractions and the complexity of the donor imputation method, provided that the imputation model mean and variance are accurately estimated. They evaluate its performance in a simulation study and show that nonparametric estimation of the model mean and variance via smoothing splines brings robustness with respect to imputation model misspecifications. They also apply their variance estimator to real survey data when nearest‐neighbour imputation has been used to fill in the missing values. The Canadian Journal of Statistics 37: 400–416; 2009 © 2009 Statistical Society of Canada     

Multiculturalism and Disability: a critical perspective

In an effort to counter discrimination and powerlessness, the disability community has espoused sociopolitical and cultural factors as defining characteristics of disability identity. This view of disability has replaced the historical medical model of disability as a deficit, and has had important implications for social action, political agendas, legislation and overall quality of life for individuals with disabilities. This article reviews current multicultural thinking, and offers a critical view of the advantages and disadvantages of positioning disability within the emergent multicultural discourse. Implications for future thinking and action to promote equal opportunity and self-determination for persons with disabilities as a cultural group with a political agenda are then advanced.     

Managing Change in Museums

Museums and the Paradox of Change, by Robert R. Janes. (2nd ed.) Calgary, Alberta: University of Calgary Press, 1997. 276 pp., $24.95 paper. Museum Strategy and Marketing: Designing Missions, Building Audiences, Generating Revenues and Resources, by Neil Kotler and Philip Kotler. San Francisco: Jossey‐Bass, 1998. 297 pp., $41.95 cloth.     

Strategies for model‐revision in a high school genetics classroom

Recent proposals to improve science education (e.g., AAAS, 1989; Rutherford & Ahlgren, 1990) have stressed the importance of providing high school students with a broad knowledge base consisting of a body of core concepts and theories. Science educators (Duschl, 1990; AAAS, 1989; Peterson & Jungck, 1988) have also argued that while concepts are an important part of any education, no student's scientific education can be considered complete without a complementary knowledge of the nature of science, including an understanding of the tentative nature of scientific knowledge and how it is constructed. In this paper we describe a science classroom in which students are given opportunities to construct and use scientific knowledge to solve realistic genetics problems, and suggest that allowing students to engage in the production of scientific knowledge can support science learning.     

The Assessment of Research Quality in UK Universities: Peer Review or Metrics?

This paper investigates the extent to which the outcomes of the 2008 Research Assessment Exercise in the UK, determined by peer review, can be explained by a set of quantitative indicators. Three cognate units of assessment are examined in detail: business and management, economics and econometrics, and accounting and finance. The main finding is that each of the three components of research activity (namely, research output, esteem and research environment) is highly correlated with various quantitative indicators. A further finding is that the judgement of the Research Assessment Exercise panels was biased in favour of Russell Group universities. There is also evidence of bias by the economics and econometrics panel. The results support the use of quantitative indicators in the research assessment process, particularly a journal quality index. Requiring the panels to take bibliometric indicators into account should help not only to reduce the workload of panels but also to mitigate the problem of implicit bias.     

Financial capability and psychological health

Financial capability is receiving increasing interest among policy makers, who wish to reduce problem debt and welfare dependency and increase savings and general skills. We examine whether financial capability has impacts on psychological health independent of income and financial resources more generally using a nationally representative survey. Data from the British Household Panel Survey 1991-2006 are used to construct a measure of financial capability, which we relate to respondents’ psychological health using the 12-item General Health Questionnaire. Estimates from within-group panel data models indicate that financial capability has significant and substantial effects on psychological health over and above those associated with income and material wellbeing more generally. For men, having low financial capability has an effect larger than that associated with being unemployed, while for women it is similar to that of being divorced. Furthermore having low financial capability exacerbates the psychological costs associated with unemployment and divorce, while high financial capability reduces these costs.     

Reliability and Validity of the World Health Organization Quality of Life: Brief Version (WHOQOL-BREF) in a Homeless Substance Dependent Veteran Population

With the high number of homeless, there is a critical need for rapid and accurate assessment of quality of life to assess program outcomes. The World Health Organization’s WHOQOL-100 has demonstrated promise in accurately assessing quality-of-life in this population. However, its length may make large scale use impractical for working with a homeless population. The World Health Organization Quality of Life—Brief version (WHOQOL-BREF), though providing a shorter instrument and being, theoretically, more manageable has not been evaluated for use with homeless individuals. This study evaluated the psychometric properties of the WHOQOL-BREF in 389 homeless veterans. Adequate internal consistency for all domains was found and validity for each domain was supported using the Personality Assessment Inventory. The WHOQOL-BREF provides a reliable, valid, and brief assessment of quality-of-life. Due to the length of the instrument and the domains covered, it could have great utility in the assessment of homeless populations with multiple problem domains.